Fuel Oil Separator · Separators & Purifiers
Alfa Laval S846-HFO-Purifier high-speed disc-stack centrifugal separator for fuel/lube oil treatment, marine main, optimised for heavy fuel oil purification. Fuel oil capacity 12500 l/h, lube oil capacity 10000 l/h. Bowl diameter 468 mm, motor power 11 kW. Part of the S-series — the current generation marine separators with ALCAP control.
| Bowl opening, cleaning, and seal ring inspection | typically 500-2,000 running hours depending on fuel quality and sludge load, per manufacturer schedule |
|---|---|
| Bearing replacement (spindle and gearbox) | typically every 8,000-16,000 running hours - confirm against the S846 maintenance manual |
| Friction clutch/belt inspection | typically annually, per manufacturer schedule |
| Gravity disc selection review | whenever the fuel supply/density changes significantly |
| Bowl seal ring condition | replace at every bowl opening as routine practice rather than by a measured limit - reused rings are a common cause of leakage |
|---|---|
| Bearing vibration/noise trend | increasing vibration or noise beyond the baseline set at commissioning indicates bearing wear - confirm against Alfa Laval's condition criteria rather than running to failure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Fuel oil purifiers in the main fuel treatment line are within the class machinery survey scope - expect checks on bowl overspeed/vibration protection, safe sludge/discharge arrangements, and that overhaul records match the manufacturer's recommended interval.
Estimated lifetime: Major wear parts (seal rings, bearings) are replaced on a running-hours/condition schedule rather than the separator having a fixed overall life; bowls and frames in HFO duty commonly remain in service 15-20+ years with proper overhaul discipline.
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