Fuel Oil Separator · Separators & Purifiers
The Alfa Laval ALCAP S831 is a centrifugal fuel oil purifier that removes water, sediments and contaminants from marine fuel oils, featuring an automatic water detection system for continuous monitoring.
What our service work and the manufacturer documentation say about keeping this model running.
ALCAP system auto-detects water content; overhaul bowl at class survey.
| Bowl opening and disc stack cleaning | per running hours per maker's manual (fuel-quality dependent) |
|---|---|
| Bowl gasket/O-ring renewal | at each bowl overhaul |
| Spindle bearing renewal | at maker's multi-year overhaul interval |
| Gear/lubrication oil change | per maker's schedule, commonly annually or every few thousand hours |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Spindle bearing radial play | renew per the maker's tolerance, typically a few hundredths of a millimetre - confirm against the separator's own manual |
|---|---|
| Friction clutch/belt condition | renew on slip or glazing - follow the maker's criteria, no universal numeric limit |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Fuel oil purifiers normally fall under Continuous Machinery Survey; class looks for maker's maintenance/overhaul records, correct operation of the automatic control and alarm functions, and intact safety guards/interlocks on the rotating bowl.
Estimated lifetime: Disc-stack separator units of this size are typically designed for continuous duty over the vessel's service life provided the bowl, bearings and gaskets are overhauled per the maker's running-hour schedule; individual wear parts are consumables renewed well before the unit itself.
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