Alfa Laval Separator
Spare Parts Supplier
Engine-room separator spare parts supply for ALCAP · WHPX · MAPX Series
Alfa Laval separator models covered
Vessel Core OÜ, an independent marine spare parts supplier in Tallinn, Estonia, quotes spare parts across the Alfa Laval marine separator programme — centrifugal separators for fuel oil purification and lube oil purification on commercial vessels — on an OEM route or a verified alternative route, and holds no agreement with Alfa Laval.
S831
ALCAP fuel oil and lube oil purifier. Disc stack assemblies, bowl liner, operating water valve, spindle assembly, O-ring kits.
S 926 – S 987
The current S range, built on the Alcap principle: no gravity disc, a water transducer in the clean-oil outlet and an EPC 60 controller. The bowl discharges through the CentriShoot slide and is locked by a non-threaded CentriLock snap ring, so bowl parts are read against this generation rather than against an older S designation.
WHPX 405 / WHPX 407
High-performance fuel oil purifiers. Disc stacks, bowl liner sets, operating water valves, spindle bearings, and seal kits.
WHPX 410 / WHPX 413
Larger WHPX series units. Complete bowl assemblies, paring discs, solenoid valve kits, bearing sets, and overhaul O-ring sets.
MOPX 205 / MOPX 207
Lube oil purifiers from a generation before the current S and P separators, with a gravity disc set to the oil. Disc stacks, bowl bodies and hoods, gravity disc sets, sliding bowl bottom seal rings, spindle bearings and O-ring kits.
MOPX 210 / MOPX 213
Larger MOPX units in lube oil and fuel oil duty. Bowl assemblies, disc stacks, friction pads and couplings, paring discs, bearing sets and complete gasket kits.
MAPX 207 / MAPX 309
Marine lube oil purifiers. Disc stacks, bowl liner, operating water valves, spindle assemblies, and full service kits. Requests for the related MOPX series are also accepted.
MAPX 313
Larger MAPX lube oil purifier. Bowl assemblies, paring disc, solenoid valves, bearing housings, seals, and overhaul gasket sets.
MAB 103 / MAB 104
Solids-retaining separators that are still in the maker's programme. They run as clarifier or purifier on fuel or lubricating oil, and the sludge collects in the bowl and is lifted out with a basket rather than discharged. Disc stacks, bowl components, sludge baskets, spindle bearings and seal kits for service and overhaul.
MMB 304 · MMB 305 · PureNOx
MMB 304 and MMB 305 are solids-retaining lube oil purifiers that can also run as clarifiers. They are cleaned by hand through a stainless-steel sludge basket, so there is no discharge hardware to order. PureNOx is a water treatment system for engines with exhaust gas recirculation: a centrifugal separator cleans the EGR bleed-off water before it goes overboard. Bowl assemblies, disc stacks, sludge baskets and overhaul kits.
Alfa Laval separator spare parts supply scope
Component-level supply for planned service intervals, running spares and time-critical separator failures across common Alfa Laval marine separator sub-assemblies for fuel oil and lube oil purification.
- Disc stacks & disc sets
- Bowl assemblies & bowl parts — hoods, discs, distributors
- Gravity discs
- Operating water valves & solenoid valves
- Spindle assemblies & spindle bearings
- Seals & O-ring service kits
- Paring discs & paring chambers
- Bearing sets & bearing housings
- Complete overhaul gasket & seal kits
- Frame & hood components
Spare parts for Alfa Laval purifiers and clarifiers
The same separator frame runs in two duties, and the duty decides which parts are on the request. Saying which one the unit is set up for narrows a parts list faster than almost anything else you can send.
Purifier
Separates water and solids from oil. The bowl holds an oil–water interface, held in place by a gravity disc sized to the density of the oil being treated. Requests here usually involve the gravity disc set, sliding bowl bottom and its seal rings, operating water valve parts, and the disc stack.
Clarifier
Removes solids only, with no water phase to hold. The gravity disc is replaced by a clarifier disc or blank plug that closes the water outlet. Requests centre on the disc stack, bowl liner, seal rings, and the same spindle and bearing wear parts as purifier duty.
On ALCAP units there is no gravity disc. A water transducer in the clean-oil outlet reports to the controller, which opens the drain valve or sends the water out with the sludge discharge. A request for a gravity disc on an S-series machine therefore usually means the model or the duty needs confirming first.
Alfa Laval purifier parts that wear first
Where separator requests concentrate in practice, whichever series the machine belongs to.
- Gravity discs & clarifier discs
- Friction pads, friction blocks & couplings
- Sliding bowl bottom & bowl body seal rings
- Disc stacks & top discs
- Spindle bearings & drive belts
- Operating water valve internals
- Paring discs & paring tubes
- Complete overhaul O-ring & gasket kits
The bowl number, the machine serial from the nameplate and the oil grade the unit runs on identify most of these without a part number. Photographs of the nameplate and of the part in question are usually enough to start.
Which machine takes a gravity disc, and which has none
A conventional purifier holds the oil–water interface with a gravity disc whose bore is chosen for the oil being treated, so the disc size belongs on the order line. An ALCAP machine has no gravity disc at all: a transducer watches the water content of the cleaned oil and the control system discharges instead.
The two wrong sizes fail in opposite ways. Too small a bore holds the interface too far in, so water reaches the disc stack and leaves with the cleaned oil — with a water alarm behind it. Too large a bore holds it too far out, so the seal at the top disc breaks and oil leaves with the water, which shows nothing until a sludge tank fills early or a bunker runs out ahead of the figures.
A disc is therefore quoted against the oil the machine is set for, not against the model alone. How the bore is chosen, and why its size follows the oil rather than the machine, is set out in the gravity disc selection guide.
Disc-stack separator — general arrangement
A licensed photograph of Alfa Laval equipment was not available at publication, so this technical reference illustrates the general arrangement shared by this equipment class.
Illustrative technical reference, not a photograph of Alfa Laval equipment or a Vessel Core installed reference — a licensed photo of this maker's equipment was not available. Vessel Core has no dealership, distribution, representation or partnership agreement with Alfa Laval; it operates as an independent spare parts supplier.
Two machines in one row are not the same machine
A fuel-oil unit and a lubricating-oil unit can look alike from outside while their internals differ, and where several machines stand in a row the plates are the only reliable way to tell which is which. Give the position tag as well as the model: a spare bought for one machine and fitted to its neighbour is a common way to lose a bowl.
The same care applies inside each machine. The bowl is a balanced rotating assembly, so exchanging one component inside it is a balancing question as well as a fitment question, and the disc stack belongs to the bowl it came out of rather than to the model name.
The plate data that makes a separator line quotable
A separator designation names a bowl size and a generation, and the parts inside the bowl follow from both. The machine serial number is what places a component in the right build, which is why it does more work in review than the type designation on its own.
- Full separator designation as stamped, with the bowl size digits — S861, MAPX 313, WHPX 410, not just the family
- Machine serial number and year of build from the nameplate
- Duty: fuel oil, lube oil or bilge, and the oil grade the machine is set for
- Gravity disc diameter where the machine takes one, or a note that it is an ALCAP machine and does not, with the controller type from the control unit (EPC 60 on the current S range)
- Bowl disc count and whether the stack has been renewed or is mixed from more than one set
- Whether the request is for the bowl, the frame, the drive or the control side — four different part groups on one skid
- Feed pump and its drive arrangement, where the line concerns the pump rather than the separator
- Part number and the parts-book page it came from, treated as a starting point rather than a conclusion
- Running hours since the last bowl overhaul, and whether the bowl has been balanced since
- Photographs of the nameplate, of the bowl top with the lock ring markings, and of the component in place
Tools for this equipment: the oil cleanliness code reader for an oil analysis report and the O-ring size finder for loose O-rings. For a fuel purifier, the marine fuel grade reader explains the ISO 8217 grade of the fuel being treated. For the bunker itself, the bunker quantity calculator converts the volume in the tank to the volume at 15 °C and tonnes by the VCF. For the separating temperature itself, the fuel viscosity-temperature calculator gives the viscosity of the fuel at that temperature from two measured points on the fuel analysis.
Parts supply for fuel oil and lube oil purification.
Separator RFQs should identify the exact installed unit, serial/build, bowl or component reference, required documentation, quantity, port and ETA. Vessel Core reviews OEM-route and verified alternative options against that evidence.
OEM or Alternative — Your Choice
We review OEM-route Alfa Laval parts for class-sensitive overhauls and warranty-required repairs. We review verified alternative components for planned service kits — disc stacks, O-ring sets, and operating water valves — where buyer approval allows it.
Time-Critical Separator Failure Review
Fuel oil or lube oil separator failures can be operationally time-critical. Operating water valves, bowl seals, disc stacks and solenoid valve kits are reviewed against supplier availability, documentation needs and freight options.
Common ALCAP, WHPX, MAPX, MAB and MMB Requests
Requests run from older WHPX, MOPX and MAPX machines still in service to the current S and P separators and the solids-retaining MAB and MMB, which are still in the maker's programme. The generation matters as much as the size: an S machine has no gravity disc, while a P machine is set with one.
Service Kit Supply
Kits are named the way the maker names them for the machine on board. On the current S range these are the Inspection Kit (bowl O-rings and seals), the Overhaul Kit (drive parts, belt, bearings and pads, with an Inspection Kit inside) and the Support Kit of strategic spares. Name the kit together with the machine designation, because the contents follow the machine, not the kit name.
Port-Aware Route Planning
Supply route, handover option and freight timing are reviewed against confirmed RFQ details, vessel ETA, port context, documentation needs and part availability before quotation. No fixed delivery commitment is made before availability and route are confirmed.
Technical Identification from Model Data
Separator model designation, serial number range and component description are sufficient to begin identification and sourcing review. Part numbers are helpful but not always required. Photographs of failed components or worn disc stacks are also accepted for part identification.
Alfa Laval separator parts — common questions
Can Vessel Core review OEM-route and verified alternative routes for Alfa Laval separator spare parts?
Yes. Vessel Core can review OEM-route and verified alternative supply options for ALCAP, WHPX, MOPX, MAPX, MAB, MMB, and PureNOx separators. Alternative-route items such as disc stacks, O-ring kits and operating water valves are reviewed at RFQ stage with documentation requirements confirmed before offer.
Which Alfa Laval separator models do you cover?
RFQs may reference ALCAP S-series, WHPX, MOPX, MAPX, MAB, MMB or PureNOx separator configurations. Provide the complete model, serial/build, bowl or component identity and part evidence before a route is confirmed.
Can you supply Alfa Laval separator parts for time-critical situations?
Yes. Separator failures affecting fuel oil or lube oil purification can be treated as time-critical RFQs. Priority supply routes and freight options are reviewed after the part details, vessel timing, port and documentation needs are confirmed.
How do I submit a quote request for Alfa Laval separator parts?
Submit vessel name, separator model designation as stamped on the nameplate (for example S 946), part numbers or a description of the component required, and your port or vessel ETA. If part numbers are not available, the separator model and component description are sufficient to begin identification and sourcing review. Photographs of worn or failed parts are also accepted.
Can an Alfa Laval disc stack or gravity disc be fitted to a Westfalia or Selfjector bowl?
No, in either direction. Alfa Laval and Westfalia bowls differ in bowl geometry, disc angles and caulk spacing, and in the gravity disc seat and bore, and a Selfjector opens its bowl with operating water acting on a pilot valve and a main cylinder, hardware the other two do not have in that form. Bowl parts are quoted against the Alfa Laval machine type and serial number, never against a cross-maker equivalence table; a separator room with all three makes can still go in one request, each machine identified from its own plate.
Which gravity disc does my Alfa Laval purifier need?
That depends on the machine and on the oil, not on the model alone. A conventional purifier holds the interface between oil and water with a gravity disc whose bore is chosen for the oil being treated, so the disc size belongs on the order line and is quoted against the oil the machine is set for. A machine with ALCAP has no gravity disc at all: a transducer watches the water content of the cleaned oil and the control system discharges instead. Send the full designation, the machine serial number and the oil grade the machine runs on.
Is the parts list different for purifier and clarifier duty?
Yes. The same separator frame runs in both duties. In purifier duty the bowl holds an interface between oil and water, set by the gravity disc, so requests usually involve the gravity disc set, the sliding bowl bottom and its seal rings, operating water valve parts and the disc stack. In clarifier duty there is no water phase to hold: the gravity disc is replaced by a clarifier disc or blank plug that closes the water outlet, and requests centre on the disc stack, bowl liner, seal rings and the same spindle and bearing wear parts. Say which duty the unit is set up for.
Do you supply parts for Alfa Laval ALCAP purifier systems?
Yes. ALCAP is Alfa Laval's control principle for fuel and lube oil separators such as the S-series: there is no gravity disc, and a water transducer in the clean-oil outlet tells the controller when water reaches the disc stack, so the machine discharges. An ALCAP list therefore holds the usual bowl parts, disc stack, seal kits and operating water parts, and sometimes the transducer or the control unit. Send the machine type and serial number from the nameplate, for example S861, and the controller type shown on the control unit.
Is Vessel Core connected to Alfa Laval?
No, and there is no agreement of any kind. Vessel Core holds no dealership, distribution, representation or partnership agreement with Alfa Laval, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Why the maker name appears on this page
Maker names help identify equipment and prepare an RFQ. They do not imply any dealership, distribution, representation or partnership agreement between Vessel Core and the manufacturers named on this page; there is none. Alfa Laval and its separator designations are referenced solely so that a buyer can describe the machine on board and the component required.
Submit your RFQ now.
Send your Alfa Laval separator spare parts request — vessel name, separator model (e.g. ALCAP S861, WHPX 410), part numbers or descriptions, and required port or ETA. Vessel Core reviews the supply route and prepares a structured supply quotation.
