"> Alfa Laval S.p.A. MOPX-207-HFO-Clarifier
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Alfa Laval S.p.A.

MOPX-207-HFO-Clarifier

The Alfa Laval S.p.A. MOPX-207-HFO-Clarifier is a legacy high-speed disc-stack oil separator configured for heavy fuel oil clarification. It is normally installed in the machinery-space fuel treatment system to reduce suspended solid contamination in conditioned fuel. In clarifier service the primary duty is solids removal rather than continuous separation of a defined water phase. Centrifugal force drives denser contamination away from the cleaned oil as the fuel passes through the rotating bowl and disc stack. The MOPX family was used in marine fuel- and lubricating-oil separation systems; the exact bowl, discharge and control arrangement depends on the installed specification. Compared with the corresponding purifier version, the MOPX-207-HFO-Clarifier uses a clarifier arrangement and must be assembled and operated accordingly. Exact throughput, permissible feed conditions, bowl arrangement and service limits must be verified from the manufacturer documentation for the installed unit.

Components & Design

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Technical Data

Model number MOPX-207-HFO-Clarifier
Capacity (HFO) 5525 l/h
Capacity (lube oil) 4420 l/h
Bowl diameter 395 mm
Motor power 11.0 kW
Application oil-cooled purifier, optimised for heavy fuel oil clarification
Drive type Direct / gear-driven
Bowl type Self-cleaning disc-stack
Fuel type optimised HFO clarifier
Capacity (at optimum fuel) 5525 l/h

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Common failures & inspection points

●Excessive sludge accumulation caused by contaminated fuel or extended cleaning intervals, producing poor clarification, restriction or vibration
●Incorrect clarifier assembly after maintenance, producing poor separation, abnormal internal flow or unstable operation
●Inadequate fuel conditioning or heating, producing deposits on the disc stack and reduced solids separation
●Worn spindle, bearings or drive components, producing abnormal noise, vibration or speed instability
●Leaking seals, blocked passages or malfunctioning discharge components where fitted, producing external leakage or abnormal separator behaviour

Service & Maintenance

Open and inspect the bowl and disc stack according to actual contamination load and the manufacturer maintenance plan. Confirm that the machine is assembled in its clarifier configuration and that all bowl components are correctly positioned. Check sludge characteristics because unusual metal, catalyst fines or other debris may indicate upstream contamination or machinery problems. Inspect the drive, bearings, spindle, seals and any operating-water or sludge-discharge mechanism fitted to the separator. Refer to the exact manual for wear limits, cleaning procedures, tightening values and operating settings.

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Replacement Parts

Keep the correct seal and service kits for the exact clarifier specification. Additional spares should reflect the installed drive and discharge arrangement and may include bearings, gaskets, valve parts and selected bowl-service components. Match critical parts by serial number and parts catalogue rather than by family name alone.
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Equipment Model #153283 · ✓ still in production