"> Alfa Laval S.p.A. MAPX-309-HFO-Clarifier
OceanSphere
Engines
⚓ Working on this equipment?
Ask the AI troubleshooter, log your hours on board and turn them into invoice-ready service reports — for this exact model.
Start free — 14 days →
No credit card required
🔧 80 verified suppliers & service companies for Alfa Laval S.p.A. in the Maritime Network Find suppliers →
Is Alfa Laval S.p.A. your company? Claim this page
Alfa Laval S.p.A.

MAPX-309-HFO-Clarifier

The Alfa Laval S.p.A. MAPX-309-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 MAPX designation belongs to an older Alfa Laval separator family; the exact sludge-handling and operating-water arrangement varies by specification and must be checked in the applicable instruction book. Compared with the corresponding purifier version, the MAPX-309-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

Component data being added…

Technical Data

Model number MAPX-309-HFO-Clarifier
Capacity (HFO) 11900 l/h
Capacity (lube oil) 9520 l/h
Bowl diameter 455 mm
Motor power 15.0 kW
Application purifier, belt-driven, large, optimised for heavy fuel oil clarification
Drive type Belt-driven
Bowl type Solids-retaining disc-stack
Fuel type optimised HFO clarifier
Capacity (at optimum fuel) 11900 l/h

🤖 Ask about this model

One free question — answered like a marine engineer. No account needed.

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.

Suppliers & Spare Parts

Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.

📄 Request sourcing links & documents
🛠 Manage this equipment in your fleet

Cases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.

Start free trial →
🔎 Suppliers & service for this equipment

Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.

Maritime Network →

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.
Working on this unit?
Log hours, photos and findings into an invoice-ready service report — OceanSphere Marine, 14-day free trial.
Need a service partner for Alfa Laval S.p.A.?
114,000+ shipyards, suppliers and service companies in the Maritime Network directory.
Equipment Model #153236 · ✓ still in production