Separator/Purifier · Separators & Purifiers
P645-MDO-Purifier by Alfa Laval S.p.A. is a high-speed centrifugal separator used to remove contamination from marine fuel or lubricating oil. It is normally installed in the purifier room or machinery space together with feed, heating where required, clean-oil discharge and sludge-handling arrangements. It belongs to Alfa Laval's P-separator platform for well-defined fuel and lubricating oils, using a manually selected gravity disc or clarifier arrangement rather than the automatic oil-density adaptation used by the S family. This MDO-Purifier variant is configured for cleaning marine distillate fuel by separating water and particulate contamination. Reliable separation depends on correct feed condition, bowl speed, clean internal passages and the correct bowl configuration for the oil being treated. Compared with the S platform, the P family is simpler in process control and is best matched to oils whose separation conditions are well established.
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What our service work and the manufacturer documentation say about keeping this model running.
Trend vibration, bearing condition, feed conditions, clean-oil quality and sludge-discharge behaviour. Clean the bowl and disc stack as required by condition and the maker's maintenance plan, inspecting seals, operating-water passages, locking parts and drive components. After overhaul, verify bowl assembly, free movement of the discharge mechanism and correct process configuration before putting the unit back on oil. Class or survey attention typically includes overspeed and safety functions, guarding, leakage, vibration records and maintenance traceability; refer to the manufacturer documentation for the exact figure.
Carry a complete bowl seal and O-ring kit, selected operating-water seals, bearings or drive wear parts according to the vessel's maintenance strategy, and the correct gravity/clarifier components for the installed duty. For critical separator plants, keep one planned-overhaul kit and the small locking, sealing and paring-disc items most likely to stop the machine after opening.
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