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Kaydon Filtration

CFS Series Critical Fuel Skid

Fuel Oil Filter · Fuel Oil Treatment

Technical data from manufacturer or class sources · not yet verified by a person

Kaydon Filtration CFS Series Critical Fuel Skid — Mission-critical diesel fuel polishing for data centers, hospitals, and standby generator installations. Draws fuel from bulk storage for continuous or as-needed polishing. Modbus or Ethernet communication for real-time monitoring.

Specifications

Technical data.reference — unverified

Water removal (ppm)below 100 ppm
Inspection

Inspector Detail

Common issues

  • Filter elements clogging faster than expected, indicating upstream tank sediment or water ingress rather than a filter fault
  • Water sensor/probe fouling causing false or missed high-water alarms
  • Pump mechanical seal weeping or leaking after extended running
  • Suction strainer at the source tank blocking and starving the skid
  • Modbus/Ethernet communication dropouts to the building or engine room monitoring system
  • Coalescer media saturation reducing water removal efficiency over time
  • External corrosion of the skid frame and piping in a humid or poorly ventilated space
  • Differential pressure gauges reading incorrectly due to trapped air or a faulty transmitter

Inspection checklist

  • Read and log differential pressure across primary and secondary filters
  • Check for fuel weeping or leaks at pump seals, unions, and filter housings
  • Verify automatic water drain operates and actually removes water from the sump
  • Test Modbus/Ethernet communication and confirm alarms reach the monitoring point
  • Listen for unusual pump noise or vibration indicating bearing or seal wear
  • Confirm all local and remote alarms (high DP, high water, low flow) function correctly
  • Inspect the skid frame, piping, and fittings for corrosion or mechanical damage
  • Confirm filter housing seals and bowls are seated and leak-free after any element change

Service intervals

Primary and secondary filter element replacementwhen differential pressure reaches the manufacturer's stated change-out threshold, not on a fixed calendar - check the gauge, not the calendar
Water separator sump drain checkeach operating cycle or per the automatic drain's own schedule
Pump seal inspectionannually, or sooner if weeping is observed
Full function and alarm testannually

Typical wear limits

Filter change-out differential pressuretrigger point is set by the manufacturer for this skid, typically a rise of roughly 0.5-1.0 bar above the clean-element baseline - confirm against the unit's own control panel setpoint before relying on this figure

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Primary fuel filter elements
  • Secondary/coalescer filter elements
  • Pump mechanical seal kit
  • Water sensor/probe
  • Filter housing O-rings/gaskets

Safety

  • Pressurised fuel system - relieve pressure before opening filter housings
  • Static discharge risk during filter element changes on flammable fuel
  • Fuel spill and fire hazard if housings are not correctly reseated
  • Confined or poorly ventilated space if the skid is installed in a small plant room

Class survey

Where this skid supports an emergency or standby power source rather than main propulsion fuel, class treats it as part of the emergency generator fuel supply and will want to see functional test records and filter change-out logs at the relevant survey, not just the generator itself.

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