Separator/Purifier · Separators & Purifiers
The Alfa Laval S.p.A. MMPX-503-MDO-Purifier is a compact high-speed disc-stack oil separator configured for purification of marine diesel oil or comparable distillate fuel. It is generally installed in the engine-room fuel-cleaning system upstream of service tanks, booster equipment or engine fuel-system components. The rotating disc-stack bowl separates denser water and suspended solids from the lighter fuel phase. The duty is typically less viscosity-sensitive than heavy-fuel-oil separation, but stable feed conditions and the correct separator setup remain essential. The MMPX family is used in packaged oil-separation systems; the exact bowl, operating-water and discharge sequence depends on the installed specification. The MMPX-503-MDO-Purifier should be treated as a specific MDO purifier configuration rather than as automatically interchangeable with HFO or lubricating-oil versions of the same basic separator size. Exact process conditions, capacity and configuration details must be taken from the manufacturer documentation for the installed serial number.
Do you have the manufacturer datasheet for this model? Send it with the enquiry form — we check it and name the source.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect the bowl, disc stack and sludge space for water-related corrosion, particulate deposits and mechanical damage. Confirm the purifier arrangement after maintenance and verify correct routing of clean-oil and water outlets. Check drive condition, bearings, spindle, seals and any operating-water or discharge system fitted to the exact model. Review downstream fuel quality and separator operating behaviour after reassembly. Use the manufacturer documentation for exact process settings, wear limits, tightening values and maintenance intervals.
Carry the correct routine service kit with seals, O-rings and model-specific renewable items. Depending on redundancy and voyage profile, consider selected bearings, drive parts, valve components and bowl-service items specified by the manufacturer. Verify compatibility with the separator serial number before using spares from another apparently similar unit.
Free of charge — send us your request for Alfa Laval S.p.A. equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Alfa Laval S.p.A. first.
Tell us what you need for this Alfa Laval S.p.A. MMPX-503-MDO-Purifier — a part, a service call, a second opinion. Are you Alfa Laval S.p.A.? Claim this brand page.
Service engineer? Write the day report for this MMPX-503-MDO-Purifier in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.