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unitrol Series

Fuel Oil Separator · Separators & Purifiers

Class-certified type (DNV register) · technical data sheet not yet verified​‌​⁠‌⁠‍‍⁠‌⁠‌‌‍​‌‍⁠⁠​

GEA Westfalia Separators & Purifiers. GEA Westfalia Marine Separators are self-cleaning centrifugal separators used for clarification and purification of fuel oil and lube oil on marine vessels. The OSD series (introduced 2000) and newer OSE eagleclass (2008/2010) feature 3-phase AC motor drive with centrifugal clutch and flat belt transmission. The OSE generation delivers 30% energy r

Specifications

Technical data.

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Separator TypeFuel Oil Separator
Inspection

Inspector Detail

Common issues

  • Bowl/disc stack fouling from sludge buildup reducing separation efficiency
  • Seal/gasket wear causing leakage between phases
  • Gearbox or friction clutch wear on the drive
  • Vibration from bowl imbalance due to incomplete desludging
  • Control system (PLC) faults in the automatic self-cleaning cycle
  • Bowl spindle bearing wear
  • Sludge discharge valve wear or incomplete sealing

Inspection checklist

  • Check separation efficiency and water content in treated fuel
  • Inspect the bowl disc stack for fouling/sludge deposits at scheduled opening
  • Check gearbox oil condition and level
  • Inspect friction clutch/brake for wear
  • Verify automatic desludging cycle timing and completeness
  • Check bowl spindle bearing condition and vibration levels
  • Inspect seals and O-rings for wear at bowl opening
  • Verify control panel alarms (vibration, back-pressure, low flow) function correctly
  • Check inlet/outlet valves and piping for leaks

Service intervals

Gearbox oil changetypically every 2000-4000 hours or per manufacturer schedule
Bowl disc stack cleaninginterval depends on fuel quality and running hours, commonly checked every 500-1000 hours or per desludging performance
Bearing/seal renewaltypically at major overhaul, commonly every 8000-12000 hours - confirm against the GEA Westfalia service schedule for this frame size
Friction clutch inspectionannually

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Critical spares

  • Bowl disc stack gasket/seal set
  • Friction clutch/brake pads
  • Gearbox bearings
  • Bowl spindle bearings
  • Sludge discharge valve seals
  • Drive belt (belt-driven variants)

Safety

  • High-speed rotating bowl - do not open until fully stopped and locked per manufacturer procedure
  • Hot fuel oil handling - burn hazard
  • Pressurised sludge/water discharge lines
  • Electrical hazard at the control panel during automatic cycle testing

Class survey

Class typically checks that separator performance (water/sediment removal ahead of the engine) meets fuel treatment requirements, that automatic control and alarm functions are tested, and that maintenance records for bowl opening and desludging intervals are available.

Estimated lifetime: Fuel oil separator bowls and drive units commonly remain in service 15-20+ years with scheduled bearing, seal and gearbox renewal; individual wear parts such as seals, bearings and the clutch are renewed on a running-hour or condition basis well before that.

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