Fuel Oil Separator · Separators & Purifiers
Alfa Laval S805-MDO-Purifier high-speed disc-stack centrifugal separator for fuel/lube oil treatment, small marine, optimised for marine diesel oil purification. Fuel oil capacity 3104 l/h, lube oil capacity 2484 l/h. Bowl diameter 365 mm, motor power 5.5 kW. Part of the S-series — the current generation marine separators with ALCAP control.
| Seal rings / O-ring set | typically every 4,000-8,000 running hours or at bowl overhaul - confirm against maker's manual |
|---|---|
| Bowl disc stack cleaning | every 500-2,000 hours depending on fuel quality and desludge interval |
| Gearbox oil change | typically every 4,000-8,000 hours or per maker's schedule |
| Major bowl overhaul / bearing replacement | typically every 8,000-16,000 hours - confirm against maker's manual |
| Seal ring wear | replace when visibly hardened, cracked, or below maker's minimum thickness - no universal figure, check maker's manual |
|---|---|
| Bowl body / disc stack corrosion or pitting | any pitting or cracking is cause for rejection regardless of measured depth - inspect per maker's guidance |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Fuel oil purifiers are typically covered under the vessel's general machinery survey rather than a dedicated class item; surveyors check that overhaul records match the maker's recommended interval and that safety interlocks (bowl-closed detection, guard) are functional.
Estimated lifetime: Bowl and rotating parts commonly remain in service 15-20 years with scheduled overhauls; seals and O-rings are consumables replaced far more frequently. Actual life depends heavily on fuel/lube quality and desludge discipline.
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