Fuel Oil Filter

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to
  Check: Check and replace both filter elements on a defined service interval (differential pressure or calendar-based), even if only one element has been in service, to ensure symmetric filter performance.
• Area: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions
  Check: Inspect and test the duplex transfer/rotary valve for smooth operation, absence of cross-leakage between housings, and correct seating in both filter positions before and after each maintenance.
• Area: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor
  Check: Drain and inspect the sump bowls for accumulated water and sediment; verify proper function of the manual drain valve and any in-line water-in-fuel (WIF) sensor or alarm.
• Area: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to pre
  Check: Check all O-rings, bowl seals, and head gaskets for cracking, swelling, or deformation; replace with manufacturer-specified parts at every element change to prevent bypass leakage.
• Area: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limi
  Check: Monitor the differential pressure gauge/indicator under operating conditions; replace the active element immediately if pressure drop exceeds the published limit (typically 0.5–1.0 bar depending on series) to avoid filter collapse.
• Area: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar
  Check: Inspect housing bowl, head, and mounting bracket for corrosion, mechanical damage, and secure fastening; verify torque on bowl wing bolts or locking ring collar to manufacturer specification.
• Area: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), ope
  Check: Verify fuel compatibility and temperature: confirm the filter assembly and element media are rated for the actual fuel type (diesel, HFO, biodiesel blends), operating temperature, and pressure in service.
• Area: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are wi
  Check: After any maintenance involving the duplex valve or bowl removal, perform a leak test at working pressure and confirm fuel flow and vacuum gauge readings are within the specified normal operating range before returning to service.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replac
  Check: Check differential pressure indicator reading against manufacturer-specified maximum allowable differential pressure (typically triggers at 0.5–1.0 bar); replace or clean filter elements if exceeded.
• Area: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, a
  Check: Inspect and test the automatic backflushing / changeover mechanism (motorised valve, turbine drive, or compressed-air solenoid) for correct actuation, timing, and completeness of backflush cycle.
• Area: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, o
  Check: Verify integrity and cleanliness of filter elements (wire-mesh candles, star-pleated elements, or basket strainers): inspect for holes, deformation, blinding, or corrosion; replace per manufacturer interval.
• Area: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is dete
  Check: Check all seals, O-rings, and gaskets on filter heads, element seats, and drain valves for leaks, hardening, or extrusion; renew if any fuel oil weepage is detected.
• Area: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel
  Check: Inspect and clean drain valve(s) and flush / drain lines; confirm that backflush discharge lines are clear and not blocked by residues or solidified heavy fuel oil.
• Area: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve sea
  Check: Verify correct operation of the duplex changeover valve (plug, ball, or damper type): smooth actuation under pressure, no internal bypass leakage past valve seals to the stand-by chamber.
• Area: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and ab
  Check: Check heating medium circuit (steam or thermal oil jacket) for correct temperature (HFO systems: 80–100 °C supply, 130–160 °C booster), circulation flow, and absence of leaks.
• Area: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates fo
  Check: Confirm classification-society-required maintenance records (e.g., IACS, DNV, BV, LR) are up to date; verify that any pressure-vessel inspection certificates for the filter housing are valid and that safety relief valves on by-pass circuits are tested.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace eleme
  Check: Check differential pressure across filter element(s) and compare against manufacturer-specified alarm/change-out threshold (typically 15-25 psid); replace elements when threshold is reached.
• Area: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the stand
  Check: Inspect and test automatic switchover / changeover mechanism (duplex valve or handle) for smooth, leak-free operation under operating pressure; verify the standby side pressurizes correctly before cutover.
• Area: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
  Check: Drain and inspect automatic water drain valve (where fitted) and water collection bowl; verify no fuel carryover and that drain opens/closes fully.
• Area: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element cha
  Check: Examine filter housing seals, O-rings, and cover/bowl threads for deterioration, swelling, or leakage; replace per manufacturer interval or at every element change.
• Area: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered byp
  Check: Verify bypass valve integrity and set-point (e.g. 50 psid for Model 980/981 series): test opening pressure and confirm it closes fully to prevent unfiltered bypass flow.
• Area: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm wa
  Check: Sample filtered fuel downstream and test for water content (ppm) and ISO cleanliness code to confirm filter is performing to specification (e.g. <100-130 ppm water, ISO 4406 target code).
• Area: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
  Check: Inspect and clean inlet Y-strainer / pre-filter basket (where fitted) to prevent coalescer element blinding; check mesh for tears or deformation.
• Area: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace
  Check: Check all instrumentation (differential pressure gauges, sight glasses, pressure gauges, TELEFLO flow switches) for correct indication and calibration; replace faulty instruments promptly.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
  Check: Check and clean or replace strainer insert (basket or ring-type strainer) at defined differential pressure or time intervals
• Area: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
  Check: Inspect and test the duplex changeover valve (two-way valve / ball valve) for smooth, leak-free switching between filter chambers
• Area: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
  Check: Verify differential pressure indicator readings and calibrate or replace sensor/indicator as required
• Area: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
  Check: Inspect filter housing, covers, and sealing surfaces for corrosion, erosion, or damage; replace O-rings and gaskets
• Area: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
  Check: Check optional magnetic insert for accumulated ferrous particles; clean or replace as needed
• Area: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
  Check: Inspect sacrificial anode (if fitted) and replace when consumption exceeds 50% to ensure cathodic protection of housing
• Area: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential press
  Check: For automatic self-cleaning filters: verify correct function of pneumatic or electric drive unit, flush valve, and backwash cycle initiation (differential pressure trigger and/or timer)
• Area: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals
  Check: Flush filter housing and drain accumulated sludge/sediment from drain valve after each cleaning or at scheduled intervals

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Filterelementüberlastung und Druckabfall
  Check: Differenzialdruck des Automatik-Rückspülfilters überwachen und dokumentieren; Umschaltung auf manuellen Bypassfilter prüfen; Verschleißzustand der Scheibenelemente kontrollieren; Filter bei visuellem Verschleiß oder unzureichender Reinigung austauschen; Inspektionsintervall alle 2.000 Betriebsstunden oder bei Differenzialdruck-Alarm
• Area: Viskositätskontrolle außerhalb Sollwert (Pump-Seize-Risiko, Einspritzfehler, Antriebs-Totalausfallrisiko)
  Check: EVT20-Viskositätssensor auf Funktionsfähigkeit prüfen; EPC50V/EPC70-Regler-Display auf Soll-/Istwert vergleichen; Heizer-Thermostat-Funktion testen (bei Öl-FCMs); Viscochief 3 Kalibrierung und Sensor-Sauberkeitsprüfung; Viskositätsbereich ±5% vom Sollwert (Motor-abhängig, typisch 10-40 cSt @ 50°C); Brennstoffwechsel-Rampenverfolgung dokumentieren
• Area: Pumpen-Ausfallrisiko und Druckversorgungsmangelerscheinungen
  Check: Druck in Hochdruck-Stufe kontrollieren: 6-16 bar (Motor-abhängig); Niederdruckpumpen (Reserve-/Betriebspumpe) auf Vibrationen, Geräuschentwicklung und Leckagen prüfen; Pumpen-Umschaltlogik testen (Redundanz-Check); Durchfluss-Sensor am Ausgang prüfen (Flow Transmitter Signalstabilität); Pumpen-Stromaufnahme (VFD-Versionen) überwachen
• Area: Heizer-Thermostat-Fehlfunktion (zu hohe/zu niedrige Brennstofftemperatur)
  Check: Thermostat-Sollwert (typisch 55-95°C für HFO, Motor-abhängig) am EPC-Display überprüfen; Heizer-Ausgangstemperatur mit Infrarot-Pyrometer oder Einbau-Sensor vergleichen; Heizelement-Stromaufnahme prüfen; Heizerblock auf Kalkablagerungen und Verschleiß inspizieren; Bypassventil auf Funktion testen; Inspektionsintervall: jährlich oder bei Temperaturabweichungen >5°C
• Area: Separator-Anbindung und FlowSync-Synchronisationsfehler (unzureichende Brennstoff-Klassifikation)
  Check: FlowSync-Pumpen-Drehzahl mit Motorlast-Signal abgleichen; Separator-Speisedurchfluss mit Sollwert vergleichen (variabler Durchfluss, nicht konstant); Speise-Rückkehr-Druckventil auf Verschleiß prüfen; Tank-Füllstand-Sensor überprüfen (Sicherheitsgrenzwert); VFD-Pumpendrehzahl-Ausgangssignal kontrollieren; Inspektionsintervall: alle 500 Betriebsstunden oder nach Brennstoffart-Wechsel
• Area: Automatisches Kontroll-System Ausfallrisiko (Fehlmeldungen, fehlende Automation, manuelles Notfallmodus erforderlich)
  Check: EPC50V/EPC70-Controller Boot-Sequenz testen; Alarm-LEDs und Display-Fehlercodes dokumentieren; Alarm-Quittierungsbutton auf Funktion testen; Sicherheitsschaltungen (Notabschaltung, Kühl/Heiz-Freigabe, Leck-Test, Spülung) prüfen; Kabelanschlüsse und Steckverbinder auf Korrosion inspizieren; Notfall-Umschaltung auf manuelle Bedienung trainieren; Inspektionsintervall: alle 6 Monate oder per Service-Empfehlung

Typ-universelle Inspektions-/Wartungspunkte fuer Fuel Oil Treatment (Alfa Laval, Mega-Schwarm 2026-06). Per-Modell-Specs nicht auto-gefuellt.

• Area: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
  Check: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
• Area: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
  Check: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
• Area: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
  Check: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
• Area: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
  Check: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
• Area: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
  Check: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
• Area: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
  Check: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
• Area: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
  Check: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
• Area: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present
  Check: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
  Check: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
• Area: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
  Check: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
• Area: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
  Check: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
• Area: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
  Check: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
• Area: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
  Check: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
• Area: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
  Check: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
• Area: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
  Check: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
• Area: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present
  Check: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
  Check: Check and clean the filter screen / disc elements for clogging, damage, or deformation; verify filtration grade integrity (micron rating maintained)
• Area: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
  Check: Inspect backflush mechanism and distributor drive motor for proper rotation, torque, and automatic backflushing cycle timing
• Area: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
  Check: Verify differential pressure indicator / alarm set-point; record pressure drop across filter at operating temperature and compare to baseline
• Area: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
  Check: Check all seals, O-rings, and gaskets on filter housing, end caps, and flanged connections for leaks or deterioration
• Area: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
  Check: Inspect and test the changeover valve (duplex units): confirm smooth switchover between chambers with no bypass of unfiltered oil
• Area: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
  Check: Check sludge collection chamber and automatic sludge drain valve: confirm periodic discharge is functioning and sludge is not accumulating excessively
• Area: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
  Check: Verify electrical connections and control panel: confirm alarm outputs, motor protection, and automatic backflush cycle controller are operational
• Area: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present
  Check: Inspect inlet/outlet pipework, drain connections, and mounting bolts; confirm counter-flanges (DIN/JIS) are leak-free and no corrosion is present

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
  Check: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
• Area: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limi
  Check: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limit)
• Area: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
  Check: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
• Area: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
  Check: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
• Area: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
  Check: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
• Area: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
  Check: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
• Area: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
  Check: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
• Area: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change
  Check: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
  Check: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
• Area: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limi
  Check: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limit)
• Area: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
  Check: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
• Area: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
  Check: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
• Area: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
  Check: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
• Area: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
  Check: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
• Area: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
  Check: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
• Area: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change
  Check: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
  Check: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
• Area: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limi
  Check: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limit)
• Area: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
  Check: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
• Area: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
  Check: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
• Area: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
  Check: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
• Area: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
  Check: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
• Area: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
  Check: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
• Area: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change
  Check: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
  Check: Check duplex selector valve (switch-over valve) for smooth operation and absence of fuel leaks at all positions — isolate each chamber in turn
• Area: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limi
  Check: Inspect filter elements: record service hours since last change; replace per manufacturer interval (up to 1,000 hours or when pressure differential reaches limit)
• Area: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
  Check: Drain water accumulator bowl: open manual drain valve and verify water separates cleanly; inspect bowl for sludge, microbial growth, or emulsification
• Area: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
  Check: Check all NPTF threaded connections, bowl seals, and O-rings for leaks, corrosion, or deformation
• Area: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
  Check: Verify WIF (Water-in-Fuel) sensor function and indicator light response where fitted
• Area: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
  Check: Inspect optional pre-heater (12/24 V electric or coolant): check wiring/hose connections, element resistance, and thermostat set-point
• Area: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
  Check: Confirm pressure gauges or vacuum indicators on each chamber are within normal operating range and not stuck
• Area: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change
  Check: Verify that priming pump (if fitted) holds prime and delivers adequate fuel pressure during cold start or after element change

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufact
  Check: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufacturer-specified threshold (typically 0.35–0.5 MPa for duplex units).
• Area: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
  Check: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
• Area: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential press
  Check: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential pressure triggers the bypass valve.
• Area: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash wate
  Check: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash water consumption remains below specified limit.
• Area: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel o
  Check: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel oil.
• Area: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream componen
  Check: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream components.
• Area: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
  Check: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
• Area: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protecte
  Check: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protected from fuel oil ingress.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufact
  Check: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufacturer-specified threshold (typically 0.35–0.5 MPa for duplex units).
• Area: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
  Check: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
• Area: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential press
  Check: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential pressure triggers the bypass valve.
• Area: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash wate
  Check: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash water consumption remains below specified limit.
• Area: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel o
  Check: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel oil.
• Area: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream componen
  Check: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream components.
• Area: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
  Check: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
• Area: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protecte
  Check: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protected from fuel oil ingress.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufact
  Check: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufacturer-specified threshold (typically 0.35–0.5 MPa for duplex units).
• Area: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
  Check: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
• Area: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential press
  Check: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential pressure triggers the bypass valve.
• Area: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash wate
  Check: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash water consumption remains below specified limit.
• Area: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel o
  Check: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel oil.
• Area: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream componen
  Check: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream components.
• Area: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
  Check: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
• Area: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protecte
  Check: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protected from fuel oil ingress.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufact
  Check: Check differential pressure indicator/gauge reading at inlet and outlet — replace or clean filter element/basket when differential pressure reaches the manufacturer-specified threshold (typically 0.35–0.5 MPa for duplex units).
• Area: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
  Check: Inspect changeover (three-way diverter) valve for smooth, leak-free operation and verify standby chamber is fully pressurized and ready before switching over.
• Area: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential press
  Check: Examine filter element or strainer basket for mechanical damage, corrosion, or deformation; clean or replace per maintenance schedule or when differential pressure triggers the bypass valve.
• Area: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash wate
  Check: Verify automatic backwash or self-cleaning cycle (where applicable): confirm controller triggers, backwash drain valve opens/closes correctly, and backwash water consumption remains below specified limit.
• Area: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel o
  Check: Check all seals, O-rings, and gaskets on filter bowls, vent plugs, and drain plugs for leakage, swelling, or embrittlement, especially after contact with fuel oil.
• Area: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream componen
  Check: Inspect bypass valve function: confirm it does not open prematurely under normal operating pressure and does open at set pressure to protect downstream components.
• Area: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
  Check: Verify that vent/bleed plugs and drain plugs are correctly torqued and not leaking; check clean-side and dirty-side drain lines for blockages.
• Area: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protecte
  Check: Confirm electrical connections, solenoid valves, and differential pressure switches (for automatic/motorized units) are properly wired, functional, and protected from fuel oil ingress.

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm set
  Check: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm setpoint requires cleaning or element replacement
• Area: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-conta
  Check: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-contamination
• Area: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressur
  Check: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressure differential indicates fouling
• Area: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fu
  Check: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fuel oil
• Area: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and complete
  Check: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and completes without interruption to the fuel supply
• Area: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
  Check: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
• Area: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
  Check: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
• Area: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel
  Check: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel, and response at rated setpoint

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm set
  Check: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm setpoint requires cleaning or element replacement
• Area: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-conta
  Check: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-contamination
• Area: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressur
  Check: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressure differential indicates fouling
• Area: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fu
  Check: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fuel oil
• Area: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and complete
  Check: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and completes without interruption to the fuel supply
• Area: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
  Check: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
• Area: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
  Check: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
• Area: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel
  Check: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel, and response at rated setpoint

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm set
  Check: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm setpoint requires cleaning or element replacement
• Area: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-conta
  Check: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-contamination
• Area: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressur
  Check: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressure differential indicates fouling
• Area: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fu
  Check: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fuel oil
• Area: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and complete
  Check: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and completes without interruption to the fuel supply
• Area: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
  Check: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
• Area: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
  Check: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
• Area: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel
  Check: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel, and response at rated setpoint

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm set
  Check: Check differential pressure across each filter element (working and standby) against the manufacturer's rated maximum; differential pressure exceeding alarm setpoint requires cleaning or element replacement
• Area: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-conta
  Check: Inspect changeover valve (three-way cock) for smooth operation and absence of leaks; confirm the valve fully seals the standby chamber and allows no cross-contamination
• Area: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressur
  Check: Examine filter elements (candle or mesh type) for mechanical damage, deformation, corrosion or blockage; clean or replace at specified intervals or when pressure differential indicates fouling
• Area: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fu
  Check: Verify heating system integrity (steam or hot-oil heating coil/chamber): check for leaks, adequate heat supply, and correct temperature of the filtered heavy fuel oil
• Area: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and complete
  Check: Test the automatic backflush or switching mechanism under load: confirm the automatic cycle initiates at the correct differential pressure setpoint and completes without interruption to the fuel supply
• Area: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
  Check: Inspect all seals, gaskets and O-rings on element housings, end caps, drain valves and changeover valves for deterioration, cracking or fuel oil leakage
• Area: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
  Check: Check drain/blow-off valves for correct operation: they must open during backflush/cleaning and close fully afterwards to prevent by-pass of unfiltered fuel
• Area: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel
  Check: Review and test the differential pressure alarm and clogging indicator: confirm correct calibration, electrical/pneumatic signal transmission to the alarm panel, and response at rated setpoint

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Verify differential pressure across both filter housings and confirm alarm/switch setpoint is within manufacturer limits before and after changeover
  Check: Verify differential pressure across both filter housings and confirm alarm/switch setpoint is within manufacturer limits before and after changeover
• Area: Inspect and clean or replace filter elements/cartridges at prescribed intervals or upon high differential pressure indication
  Check: Inspect and clean or replace filter elements/cartridges at prescribed intervals or upon high differential pressure indication
• Area: Check switchover mechanism (handwheel, gearbox, inlet/outlet valves) for smooth operation and absence of leaks during changeover procedure
  Check: Check switchover mechanism (handwheel, gearbox, inlet/outlet valves) for smooth operation and absence of leaks during changeover procedure
• Area: Drain and inspect the standby housing sump for water, sludge, and sediment accumulation before returning it to service
  Check: Drain and inspect the standby housing sump for water, sludge, and sediment accumulation before returning it to service
• Area: Inspect all O-ring seals, gaskets, and closure hardware for wear, deformation, or leakage; replace per service schedule
  Check: Inspect all O-ring seals, gaskets, and closure hardware for wear, deformation, or leakage; replace per service schedule
• Area: Verify automatic changeover actuator (if fitted) functionality and calibration; test alarm output to control system
  Check: Verify automatic changeover actuator (if fitted) functionality and calibration; test alarm output to control system
• Area: Check housing vent and drain valves for correct operation; confirm no air lock exists in standby housing prior to switchover
  Check: Check housing vent and drain valves for correct operation; confirm no air lock exists in standby housing prior to switchover
• Area: Inspect filter housing exterior for corrosion, coating damage, and structural integrity; verify mounting bolts and supports are tight and undamaged
  Check: Inspect filter housing exterior for corrosion, coating damage, and structural integrity; verify mounting bolts and supports are tight and undamaged

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Area: Verify differential pressure across both filter housings and confirm alarm/switch setpoint is within manufacturer limits before and after changeover
  Check: Verify differential pressure across both filter housings and confirm alarm/switch setpoint is within manufacturer limits before and after changeover
• Area: Inspect and clean or replace filter elements/cartridges at prescribed intervals or upon high differential pressure indication
  Check: Inspect and clean or replace filter elements/cartridges at prescribed intervals or upon high differential pressure indication
• Area: Check switchover mechanism (handwheel, gearbox, inlet/outlet valves) for smooth operation and absence of leaks during changeover procedure
  Check: Check switchover mechanism (handwheel, gearbox, inlet/outlet valves) for smooth operation and absence of leaks during changeover procedure
• Area: Drain and inspect the standby housing sump for water, sludge, and sediment accumulation before returning it to service
  Check: Drain and inspect the standby housing sump for water, sludge, and sediment accumulation before returning it to service
• Area: Inspect all O-ring seals, gaskets, and closure hardware for wear, deformation, or leakage; replace per service schedule
  Check: Inspect all O-ring seals, gaskets, and closure hardware for wear, deformation, or leakage; replace per service schedule
• Area: Verify automatic changeover actuator (if fitted) functionality and calibration; test alarm output to control system
  Check: Verify automatic changeover actuator (if fitted) functionality and calibration; test alarm output to control system
• Area: Check housing vent and drain valves for correct operation; confirm no air lock exists in standby housing prior to switchover
  Check: Check housing vent and drain valves for correct operation; confirm no air lock exists in standby housing prior to switchover
• Area: Inspect filter housing exterior for corrosion, coating damage, and structural integrity; verify mounting bolts and supports are tight and undamaged
  Check: Inspect filter housing exterior for corrosion, coating damage, and structural integrity; verify mounting bolts and supports are tight and undamaged

Typ-universelle Inspektionspunkte fuer Fuel Oil Treatment (verifiziert, 2026-06).

• Changeover valve leakage
• Filter element collapse from high DP
• Drain valve seeping

• Backflush valve stuck
• Filter element mesh rupture
• Differential pressure sensor drift
• Motor drive failure