Pumps & Pump Spares

Marine Pump
Spare Parts Supplier

Engine-room marine pump spare parts supply for cooling, fuel, lube oil, ballast, cargo and sewage pump components.

Evidence intake

Maker, model, serial, photos, nameplates, drawings, quantity, port and ETA.

Technical check

Request context is structured before supplier routing or quotation work.

Supply route

OEM route or verified alternative route can be reviewed where appropriate.

RFQ handoff

Commercial request is prepared for clearer supplier review and buyer reply.

Pump systemsCooling, fuel, lube, ballast, cargo, sewage
OEM + verified alternativesRoute review by requirement
Technical ID reviewMaker, model, serial, nameplate, drawings
Port-aware deliveryUrgency, ETA and handover planning
Pump spare parts supplier

Marine pump parts sourced around the installed system.

Vessel Core supplies purchasing teams, superintendents, marine engineers, repair yards and maritime agents with pump spares across engine-room and ship service systems.

The request can include a complete part number, or it can start from the pump maker, model, serial number, installed system, nameplate photo, drawing position or component photos. The aim is to structure the RFQ quickly enough for commercial review without losing technical accuracy. For an overview of common marine pump types, see the marine pumps spare parts guide; lube oil pumps also appear, next to duplex filters and coolers, in the lube oil system guide.

Supply scope

Pump systems and spare parts we can structure into an RFQ.

Commercially useful spare parts supply coverage for planned maintenance, time-critical repairs and engine-room supply review.

01

Cooling water pumps

Impellers, wear rings, mechanical seals, shafts, bearings, gaskets and overhaul parts.

02

Fuel pumps

Screw sets (power rotor and idlers) and gear sets, pump inserts and liners, relief valve parts, mechanical seals, couplings, filters and gasket kits. Fuel transfer, booster and supply duty is usually a screw or gear pump rather than a centrifugal, and the two take different internals, so state which is fitted; screw-pump identification is covered on the IMO AB, Allweiler and KRAL pages.

03

Lube oil pumps

Pump internals, shaft seals, bearings, coupling elements, strainers and service kits.

04

Ballast, bilge and fire pumps

Impellers, wear rings, mechanical seals or gland packing, shaft sleeves, bearings, casing parts and gaskets. Fire and bilge duty carries survey and documentation expectations beyond the mechanical fit, so flag it on the request and the route and paperwork question is settled before quotation; how those duties are identified is set out on the Naniwa, Shinko and Azcue pages.

05

Cargo pumps

Impellers and rotors, mechanical seals, shafts, couplings, bearings and overhaul kits. On a line-shaft-driven deepwell cargo pump, the shaft column, its slide bearings and the deck arrangement belong on the request beside the wet end; the deepwell codes are listed on the Hamworthy page.

06

Sewage pumps

Cutters, impellers, seals, gaskets, motor-related components, valves and service parts.

07

Mechanical seals

Seal assemblies, seal face pairs, elastomer kits, shaft sleeves and gland packing. A seal is matched by its arrangement, face-material pairing and elastomer grade, not by shaft size alone, and the seal fitted may come from a seal maker rather than from the pump maker: see EagleBurgmann, John Crane, AESSEAL and Vulcan.

08

Overhaul kits

Grouped service items for maintenance jobs where multiple wear components are replaced together.

Model index

88 models in this category, filterable.

Start typing a designation, a maker or a part and the rows filter as you go. The full list across every category and maker lives on the maker reference page.

88 models · 41 notes

Model index for this category: designation, series, maker and the parts typically requested.
ModelSeriesMakerTypical parts
AE seriesEccentric screw · AE seriesAllweilerAllweiler's AE range eccentric screw pumps run a chromed rotor inside an elastomer stator, driven through a jointed drive shaft. The stator carries twice the rotor pitch and one lobe more, which is what forms the sealed cavities that travel along the axis. On sludge, bilge, waste oil and chemical dosing duty the stator is the consumable — and its compound, not the pump size, sets the replacement interval.
SN series — three-screw, fuel and lube oil dutyThree-screw · SN seriesAllweilerOne driving spindle meshing with two idler spindles inside a close-fitted bore. Seen on heavy fuel supply and circulating duty and equally on lube oil service, since the pumped oil is also the film that carries the idlers.
SNS series — three-screw, alternative bearing and sealing executionThree-screw · SNS seriesAllweilerA three-screw build differing in bearing arrangement, sealing execution and mounting rather than in application; it turns up on lube oil circulation, stern tube service, hydraulic power packs and fuel duty alike. Quiet running and virtually pulsation-free flow are the reason it is chosen, and the reason wear is noticed late.
NB · NIS · NISOCentrifugal · NB, NIS, NISOAllweilerAllweiler's NB, NIS and NISO ranges follow the EN 733 dimension standard, which is why a bearing bracket sometimes interchanges and a seal chamber does not. State the type code and the actual impeller diameter — these pumps leave the works with the impeller machined down to the ordered duty point, so the trim is not recoverable from the model name.
AN and BOB seriesCentrifugal · long-coupled baseplateAzcueBaseplate-mounted single-stage units driven through a flexible coupling, AN covering heavy-duty service. Requests cover the impeller, the wear-ring pair, the seal assembly, drive-end and non-drive-end bearings and the coupling element.
BT-HM / BT-LV seriesPositive displacement · triple screwAzcueTriple-screw pumps on fuel oil transfer, MDO and LSGO service, and low- and high-viscosity lube oil duty — BT-HM close-coupled, BT-LV vertical in-line. Component requests centre on the screw set (power rotor and idler screws), the insert or liner, shaft seal, bearings and the built-in relief valve spring and seat.
CA seriesCentrifugal · self-primingAzcueHorizontal self-priming single-stage centrifugal. The inlet sits high on the casing so liquid is retained after the first prime, allowing repeated priming on bilge, ballast, deck wash and grey water duty and short dry running. Passes soft solids — state the size actually required. Built close-coupled with a lantern bracket or as a bare-shaft head, in cast iron GG25, bronze or AISI 316. Wear parts: impeller — closed or semi-open depending on the build, so state which is fitted — casing and cover wear rings, mechanical seal, shaft sleeve and casing gasket.
CM, LN and VM/VR seriesCentrifugal · vertical in-lineAzcueVertically arranged in-line pumps used where deck and flat space is tight — cooling circuits, transfer and pressure sets. CM is long-coupled, LN is close-coupled, VM and VR are rigid-coupled. Shaft, sleeve, seal seat and bearing bracket components dominate the wear list.
CP seriesCentrifugal · close-coupledAzcueSmall close-coupled (monobloc) single-stage centrifugal, with lantern bracket and back pull-out design so the motor comes off without breaking pipework. Requests typically cover the impeller, wear-ring pair, mechanical seal, pump shaft and bearings.
MA, MO/BR, RA, KL/KB and RKZSide channel and eccentric screwAzcueThe MA, MO/BR and RA side channel ranges self-prime and keep pumping gas-laden liquid on tank stripping and priming duty, with a stage code carried in the model number. KL and KB eccentric screw units and RKZ vertical piston pumps handle viscous and sludge media. State the stage count and the medium so stage components, rotor and stator can be scoped.
MN seriesCentrifugal · monobloc to DIN 24255AzcueHorizontal close-coupled (monobloc) single-stage centrifugal built to the DIN 24255 footprint — the workhorse range on cooling, ballast and general service, dropping into existing DIN 24255 pipework. Impeller, casing and cover wear rings, mechanical seal and shaft sleeve dominate the wear list.
W/VTwin-screw pumps · W/V seriesBornemannBornemann lists W/V among its twin-screw series. Used-pump listings give codes that start with W, then a size number and further letters and digits, and show such pumps ashore on fuel oil and heavy oil. Every character of the code is copied, because the letters after the size belong to the pump, and screws and seals follow the code and the serial together.
HCTwin-screw pumps · HC seriesBornemannA second Bornemann twin-screw series, written HC with two groups of digits after the letters in the full code. An HC pump is never quoted from a W/V parts list of a similar size: its screws, seals and bearings come from its own code and serial.
DSL seriesCentrifugal · SL programmeDESMIConsult the plate — the SL designations separate suction and coupling arrangement, which changes the impeller, wear ring and bearing spares. Whether the unit in front of you is a double-suction build (no single suction-side wear ring, different impeller) has to be confirmed against the pump manual, not inferred from the three letters on the casing.
ESL seriesCentrifugal · SL programmeDESMIAnother SL designation separated by suction and coupling arrangement rather than by size. Seal face pairs, elastomer kits, impellers and rolling-element bearings recur on the line list, but an end-suction build brings its own bearing bracket, pump shaft and coupling spacer, so confirm the arrangement before a wear ring is matched.
NSL seriesCentrifugal · Vertical in-lineDESMISingle-stage vertical in-line centrifugal pumps bolted directly into cooling and general-service pipe runs, with the driver carried above the casing. The high-head variant (NSLH) carries a different plate designation and different hydraulic spares — read the plate rather than assuming NSL. Requests usually cover the casing wear ring, impeller, mechanical seal cartridge, shaft sleeve, motor stool/lantern and the seal chamber components. Long-coupled variants add a bearing bracket and coupling spacer — state which build is fitted, because the two carry different spares.
ROTAN internal gear pumpsPositive displacement · Internal gearDESMIDESMI's ROTAN internal gear pumps on fuel oil, lube oil and viscous transfer duty, where a centrifugal would lose prime or shear the medium. Line items typically cover the rotor and idler set, idler pin and bushings, front cover and gasket, mechanical seal or packing set, and relief valve parts. State the bushing material with the request: a fuel-duty build and a sludge-duty build of the same frame size take different ones.
12EC-24 · 16EC-24 · 16EC-24HCargo pumps · ECEbaraMain cargo unloading pumps fixed in the cargo tank and bracketed to the pump tower; the maker notes that a tank on a liquefied gas carrier typically has two of them. 16EC-24H is listed as a high-flow cargo pump alongside 16EC-24, so a request that drops the final letter describes a different pump.
2EC-12Spray and stripping pumps · ECEbaraA fixed in-tank pump that sprays LNG onto the inside top of the cargo tank to keep it cold and reduce boil-off, and takes the tank down to its minimum liquid level; the maker adds that spray pumps are often used for product recirculation. Its very low suction-head requirement rests on the inducer, so inducer condition is worth describing whenever one of these pumps is opened.
1EC-063 · 1.25EC-082 · 1.25EC-083 · 1.5EC-092Fuel gas pumps · ECEbaraLow-flow, high-head pumps that feed LNG to the engines. The maker says it developed the first dedicated LNG fuel gas pump for LNG carriers more than three decades ago, and it now offers fuel gas pumps for fuel gas supply systems and LNG fuel tanks on LNG-fuelled ships. 1.25EC-082 and 1.25EC-083 share a size figure but are listed as two-stage and three-stage versions, so the last digits are not optional.
8ECR-12Emergency cargo pump · ECREbaraA retractable back-up pump, lowered down a column and seated on the foot valve to empty a tank if both of its cargo pumps fail. The maker lists its accessories as a set of their own: foot valve, cable support system, headplate, deck junction boxes and storage containers.
8EC-12Bunkering cargo pumps · ECEbaraSmaller-capacity cargo pumps for LNG bunkering vessels and barges, fixed in membrane or C-type tanks. The maker's bunkering sample curve is drawn for an 8EC-12 run from a low-voltage AC drive, which lets the speed be reduced to take the tank down to a low level. The drive is paired with the motor to give the pump curve, so the drive model belongs on the request as well.
1.25ECC-085Suction-vessel pumps · ECCEbaraAn ECC pump sits inside its own suction vessel, built to the applicable pressure vessel code, which serves as the outer pump casing. The maker uses this arrangement for high-pressure send-out on FSRUs, and its brochure shows the variable-speed CRYO-Fuel fuel gas pump as 1.25ECC-085. On floating units vessel-mounted pumps get additional lateral supports; those belong to the installation rather than to the pump.
OnlineVacOnline vacuum unitsEvacLiquid ring pumps V16 and V26, mechanical seals, bearings and macerating parts
EasyVacOnline vacuum unitsEvacLiquid ring pump, seals, bearings and macerating parts; unit sold in the Asia-Pacific market
OnlineFlex FX · 2FXLobe-pump vacuum unitsEvacLobe pump items and the retrofit pump sets offered for older installations
EasyFitEjector vacuum unitsEvacDriving pump, ejector and component kit items
CRVertical multistage · CRGrundfosGrundfos describes CR pumps as multistage in-line pumps, and its marine range lists them for fire and general service, boiler feed, thermal oil, freshwater generator and freshwater cooling duty. The hydraulic end is a stack of chambers and impellers between base and pump head, with neck rings in the chambers and a bearing ring in some of them. Enquiries centre on the shaft seal, chamber-stack parts, the coupling and the O-rings.
CRNStainless multistage · CRN, model GSGrundfosThe CRN keeps every part in contact with the pumped liquid in stainless steel. For marine and offshore service Grundfos offers the model GS, in which the parts outside the liquid are upgraded to stainless steel as well. The CRN is built in several material variants, among them G, GI, GX and GS, so the material code in the designation is copied with the rest of the line.
CRTTitanium multistage · CRTGrundfosThe titanium member of the CR family, which Grundfos lists for scrubber cooling and ejector pump duty in the engine room and describes as suitable for seawater. Grundfos covers a CRN and a CRT of the same size in one set of service instructions, so the range letters, not the frame size, tell the materials apart, and a chamber or a seal is never matched on size alone.
NB · NBG · NKEnd-suction · NB/NKGrundfosNB and NBG are single-stage volute pumps with an axial inlet and a radial outlet; Grundfos groups them with the NK as end-suction pumps for freshwater cooling and HVAC on board, in cast iron and duplex steel. NB complies with EN 733 and NBG with ISO 2858. Impellers, wear rings, shaft seals and pump-cover O-rings are the recurring lines, and the material code in the designation sets what the impeller and the wear ring are made of.
TP · TPDIn-line · TPGrundfosClose-coupled in-line pumps with a rigid shaft, which Grundfos lists for freshwater cooling and HVAC service on ships. TPD is the twin-head version, so the request states which head the parts are for. The pump plate prints the actual impeller diameter, and an E after the range letters, as in TPE, marks an electronically speed-controlled pump.
CM · Hydro MPC · SEG · SEV · DDE · DMEUtility systemsGrundfosThe marine range also reaches utility systems: CM pumps on freshwater generator and chilled water service, Hydro MPC booster sets, SEG and SEV sewage pumps and the DDE and DME digital dosing pumps. For a booster set or a dosing system, send the system designation together with the plate of the unit that has failed.
HL-CONT CompactSewage treatment plant · smallest rangeHamannThe maker's smallest flotation plant, built in one size, 0125, in two layouts: A as delivered, B for minimum depth such as wall mounting. A macerator is an option, since most toilet systems on vessels of this size already macerate.
HL-CONT PlusSewage treatment plant · main rangeHamannThe all-round flotation plant in sizes 0125, 025, 05, 10, 20, 40 and 80, built in a standard IMO/EU-MED/UK-MER execution and a USCG execution. It can be delivered dismounted for assembly on board, and a macerator is part of the plant from size 05 upwards.
HL-CONT Plus OceanCruiseAdvanced wastewater treatment · oceanHamannTwo flotation units with two moving bed biofilm reactors between them, installed as four separate modules that can sit on different decks. Built for discharge in the Baltic Sea special area and in Alaskan waters; ship's tanks may be converted into the reactor modules.
HL-CONT Plus RiverCruiseAdvanced wastewater treatment · inlandHamannTwo flotation units and one moving bed biofilm reactor in three separate modules, certified for inland waterway vessels under Commission Directive 2012/49/EU and to ES-TRIN.
TS Compact · TS PlusSewage tanks · transferHamannPumps, motor-operated valves and level sensors run from a control cabinet that move grey water into the sewage mixing tank: one way on TS Compact, and on TS Plus also between holding tanks and overboard, with a touch display showing the level of every tank.
TA BW · TA SL · TCSewage tanks · conditioningHamannTank aeration by air blower for black water (BW) and sludge (SL) holding tanks against hydrogen sulphide, and tank circulation (TC) that keeps the sludge tank pumpable, run together with a HAMANN discharge system.
DS Compact · DS Plus · VSDischarge and vacuumHamannDischarge systems in single or dual pump setups, DS Plus with discharge rates programmed to the vessel's discharge table; and VS vacuum systems built on a frame around Jets or Evac vacuum generators, so the generator is identified under its own maker's name.
CGA 50 · CGA 65CG · vertical single-stageHamworthyThe smaller CG frames of the vertical single-stage centrifugal family. Impeller, casing and cover wear rings, mechanical seal, shaft and sleeve, bearings and the casing gasket are the wear set; the figure after the letters is the connection size carried in the type code, not a capacity.
CGB 80 · CGB 100CG · vertical single-stageHamworthyMid-size CG frames on cooling, ballast and general service duty. Requests cover the impeller, the wear-ring pair, the mechanical seal assembly, drive-end and non-drive-end bearings and the shaft; state the execution suffix that follows the size, since it separates builds.
CGC 125 · CGC 150CG · vertical single-stageHamworthyThe larger CG frames, where a worn wear ring is felt as lost delivery before it is heard. Impeller, wear rings, seal assembly, bearing housings and the shaft sleeve are the recurring lines, and the pump serial rather than the size decides which drawing the parts come from.
CGD 200 · CGD 250 · CGE 300 · CGE 350CG · vertical single-stageHamworthyThe top of the CG range, met on main cooling and ballast duty. Impellers, wear rings, mechanical seals, bearings, shafts and sleeves are the usual scope; on these frames the coupling element and the driver identity are worth listing separately from the pump.
DL · DW · DWK/P · DWG · CKL · DolphinDeepwell and submerged cargo pumpsHamworthyHere the code is a letter group and a cargo, not a size: DWK/P is the nitric acid and VCM variant, DWG carries an inducer for ammonia and gases, CKL is the oil-lubricated family for crude and refined cargoes and Dolphin is the centrifugal line. A DL is line-shaft driven, so the drive shaft column, slide bearings and the deck arrangement belong in the request beside the wet end.
RV · RVA · RVDRV seriesHeishinThe RV group is the Heishin code met most often on parts enquiries, RVA and RVD naming separate executions of it. Requests are written from the letters together with the size figure stamped after them, and cover the rotating set, the shaft seal, bearings and the casing gasket.
VSK · VDK · VKVSK / VDK seriesHeishinThree neighbouring letter codes that are easy to transpose, and a transposed code lands on a different pump. VDK sizes are written with a letter suffix after the figure, so copy the whole string; the wear scope is the rotating set, the seal, bearings and static gaskets.
CYCY seriesHeishinA short code with executions written as CY and CY-F-MN, and the suffix is part of the identity. Send the plate as it reads: on a two-letter code, a suffix dropped in transcription is the most common reason a quotation has to be reopened.
PV · PVNPV seriesHeishinPV and PVN sit next to each other in the programme and are not interchangeable. Requests cover the rotating element, the shaft seal arrangement, bearings and the gasket set, listed against the pump serial rather than the code alone.
NHL · NVL · NTH · NY · 2NLProgressing-cavity rangesHeishinThe N codes are the progressing-cavity ranges, where a rotor turns inside an elastomer stator and the stator is the consumable. State the medium and the stator compound with the request, because on sludge, bilge and waste-oil duty the compound, not the pump size, sets the replacement interval; the drive shaft joints and the shaft seal belong on the same list.
ACD — high-capacity framesIMO ACD SeriesIMO ABDouble-suction construction feeds both rotor ends and discharges in the centre, which doubles displacement for a given rotor size and cancels axial thrust between the two halves rather than raising differential pressure. Typical duties are high-flow, moderate-pressure lube oil and transfer service. High-pressure hydraulic duty is met by single-suction frames with a short rotor lead and more sealed closures in series.
ACE — transfer and booster framesIMO ACE SeriesIMO ABCompact single-suction three-screw pumps on fuel oil transfer, separator feed, burner supply and hydraulic power pack duty, where a short rotor lead and more sealed closures in series carry the high differential pressure. Requests commonly resolve to a matched rotor set, the idler bearing surfaces, the pump insert, or a mechanical seal and bearing kit.
ACG — lube oil service framesIMO ACG SeriesIMO ABLarger single-suction frames on four-stroke and geared plants for engine and gearbox lubricating oil circulation, on stern tube and prelube service across ship types, and on heavy fuel booster and hydraulic power pack duty. On large two-stroke installations the main LO circulating pumps are centrifugal; the screw pumps sit on stern tube, prelube, transfer and purifier feed. Housing liners, cartridge assemblies and relief valve internals are the recurring lines on this family.
CNLB · CNLeCentrifugal pump familiesIron PumpCNLB and CNLe are two of Iron Pump's centrifugal families, alongside BDV piston pumps, QT anti-heeling sets and the Ellehammer ejector range under the same maker. The pump itself is stamped IRON on the casing rather than the full Iron Pump name, a detail worth checking before a different maker is assumed.
K, L and C seriesScrew pumpsKRALGeneral-purpose K series, medium-pressure L series and the high-capacity C series (CK, CL, CG sub-types) cover fuel, lube oil, hydraulic and burner duty. State the sub-type letter on a C-series request, since housing material and screw set differ between CK, CL and CG.
ILN, ILNS and ILNECentrifugal · vertical in-lineKSBVertical in-line pump with a closed impeller and a mechanical seal, back pull-out. ILNS adds an auxiliary vacuum pump and ILNE an ejector, quoted as their own lines. Impeller, mechanical seal, shaft parts, bearings and casing joints.
MovitecMultistage · vertical high-pressureKSBRing-section multistage pump, close-coupled, nozzles in line. Stage parts follow the complete designation on the plate rather than the family name; impellers, stage parts, shaft seal and O-rings.
Magnochem and Magnochem-BlocSeal-less · magnetic driveKSBSeal-less volute casing pumps with a magnetic drive and no shaft seal. Requests centre on the containment shroud, the wetted-side bearings and the drive, quoted against the serial number and the shroud fitted.
L2 range (L2NG, L2NT)Twin-screw pumpsLeistritzSingle-volute twin-screw pumps with one shaft seal and spindles carried in bearing bushes; the L2NT is the semi-submerged cargo pump hung in a barrel. Spindle set, bearing bushes and the seal letter at the end of the type code.
L3 range (L3NG, L3NT, L3MF)Three-spindle screw pumpsLeistritzLube oil, fuel and hydraulic duty, including engine-mounted gear-driven main lube oil pumps without a shaft seal, submerged L3NT units and L3MF steering gear pumps. Give the engine maker for engine-mounted units.
L4 and L5 rangesDouble-volute and five-screw pumpsLeistritzThe L4 is a timing-gear twin-screw pump with a replaceable insert and oil-lubricated bearings; the L5 is the five-screw cargo design. The range digit is not a spindle count.
FLEXCORECartridge screw pumpsLeistritzThe exchangeable pump cartridge is changed as one unit on fuel and lube oil service; confirm magnetic drive or mechanical seal before ordering.
NEMO BYProgressing cavity · block designNETZSCHThe compact NEMO execution: the drive is flanged straight onto the pump lantern, and a coupling rod with two joints carries the drive to the rotor. The rotor turns eccentrically inside a fixed stator, so on oil sludge, bilge and oily-water duty the wear concentrates in the stator and in the joints that drive the rotor.
NEMO SYProgressing cavity · bearing housingNETZSCHA NEMO with its own bearing housing: a large double bearing, a two-part shaft and a free shaft extension, so the pump can take an electric, hydraulic or diesel drive. An SY adds bearing-housing bearings and seals to the parts list; rotor, stator and joint parts are read the same way as on a block pump.
NEMO FSIP · FSIP.ready · FSIP.advanced · FSIP.proProgressing cavity · Full Service in PlaceNETZSCHFSIP gives the suction housing a large inspection cover. FSIP.ready adds the cover; FSIP.advanced adds a split coupling rod, joined to the rotor by a sleeve coupling on a single screw, so rotor and stator are changed with the pump left in its pipework; FSIP.pro adds a cartridge mechanical seal that comes out through the same opening. Installed BY and SY pumps of the sizes NETZSCH lists can be converted, so the housing on board may be newer than the order documents.
iFD-Stator 2.0 · xLCStator buildsNETZSCHA conventional NEMO stator has its elastomer vulcanised into the tube with seals at both ends, and the whole stator is the spare. The iFD-Stator 2.0 keeps a reusable two-part housing with a polygonal profile and renews only the NEMOLAST elastomer part inside it. Where an xLC unit sits on the stator flange, it compresses the elastomer axially to restore the preload between rotor and stator as wear sets in.
NOTOS 2NS · 3NS · 4NSMulti-screwNETZSCHNETZSCH's marine material puts NOTOS 2NS and 3NS pumps on lube oil, hydraulic units and fuel transfer and supply to the engines, the 3NS on lube oil for steering gear and controllable pitch propellers, and the 2NS and 4NS on bunkering. The 4NS is a geared twin-screw pump. A NOTOS request is read against spindles, bearings and shaft seals, never against a stator.
TORNADO T.Envi · N.Mac · M-OvasRotary lobe and grindingNETZSCHTORNADO rotary lobe pumps turn up on sewage, wastewater and ballast duty and on waste-oil and oily-water transfer; NETZSCH presents the T.Envi as the execution adapted to service at sea, with metal-elastomer lobes, elastomer inserts and an oil-free toothed-belt synchronising drive. On passenger ships an N.Mac or M-Ovas macerator is often fitted ahead of the sewage pump to cut solids.
VID · VIBVID / VIB seriesShin ShinTwo of the Shin Shin letter codes met on Korean-built tonnage. The code and the size figure stamped after it are what identify the pump, and the wear scope is the impeller, the wear-ring pair, the mechanical seal, the shaft with its sleeve and the bearings.
SVF 150 · SVS-100 · SVS-150SVF / SVS seriesShin ShinThe SV codes are written with and without a hyphen before the size, and both forms appear on parts lists for the same pump. Impeller, wear rings, mechanical seal, shaft sleeve and casing gasket are the recurring lines.
VF 125 · MLO 200A1VF and MLO seriesShin ShinTwo more codes from the same programme, MLO carrying a letter-and-figure suffix after the size. The suffix separates executions, so a request written from the first three characters narrows to a family rather than to a part.
EHS 50B · EHC 40A · SHC 40AEHS / EHC / SHC seriesShin ShinThree codes that differ by one letter and are frequently mixed up in transcription. Send a photograph of the plate with the request where possible; the parts asked for are the impeller, the seal, bearings, shaft components and the gasket set.
KV designationVerticalShinkoVertical arrangement with the shaft carried on bearings in the bracket above the casing. Where the design includes a priming arrangement, the priming chamber joints, the non-return valve and the air separator internals belong in the same request; whether they apply is read from the pump section drawing rather than assumed. Seal face condition, wear ring clearance and bearing bracket wear drive most of the requests raised against these pumps.
RVP designationVertical in-lineShinkoMotor mounted above the casing on a spacer bracket, suction and discharge on a common horizontal axis. Chosen where floor plate space is short. Wear parts move as a group: impeller, casing wear ring, mechanical seal, shaft sleeve and coupling rubbers.
DW Gas · DWGDW Cargo Gas PumpsSvanehøjLineshaft-driven deepwell cargo pump that discharges through its own column, built for gas carriers from small fully pressurised ships to fully refrigerated VLGCs; the maker lists LPG, ammonia, ethane, ethylene, LNG and CO2 among the cargoes it handles without component changes. The maker's deck-level service schedule names the flexible coupling element, the bearing arrangement, the sealing liquid and the anti-rotation device; the double mechanical seal set comes in when the seal system shows a fault.
NMB Booster PumpBooster pumpsSvanehøjRaises discharge pressure when a fully refrigerated carrier offloads lighter cargoes, and is also built as an in-line vertical unit. The maker describes its shaft bearings and seals as easy to reach and its drive as a heavy-duty flexible coupling to the electric motor, so seal items, bearings and the coupling element are the parts to name.
DW Fuel PumpFuel gas pumpsSvanehøjThe DW gas pump downsized for fuel gas supply: a multistage centrifugal pump in cryogenic stainless steel with the motor outside the fuel tank, offered for LNG and also for LPG, ethane, methanol and ammonia. The maker states that the pump can be retracted even with gas in the tank, which is what its foot valve system is for; name those parts first, then seal and bearing items.
CS Fuel Pump · HPP Triplex Pump Unit · HP NH3 Booster PumpFuel gas pumpsSvanehøjThe CS Fuel Pump is the maker's all-electric submerged design for LNG fuel, with a self-cleaning filter; the HPP Triplex Pump Unit is a high-pressure piston pump unit for LNG; the HP NH3 Booster Pump for ammonia, also presented as the HP NH3 Fuel Pump, is hermetically sealed and has no mechanical shaft seals. Name the unit exactly, since the three are built on different principles.
2VCS · VCS · 2VSRCanned motor · VCSTeikokuOn these pumps the size figure is written in front of the code, as in 250-2VCS or 200 VCS, and the whole string is the identity. A canned motor pump has no shaft seal, so the items that wear are the plain bearings and thrust surfaces, the rotor and stator cans and the internal circulation parts.
300 VCD · 350 VCD-B2 · 450 VCD-ACanned motor · VCDTeikokuVCD units are met on central cooling fresh water duty, and the suffix after the code separates executions. Bearings, thrust washers, the liner, internal filters and the wear monitor components are the recurring lines; quote the suffix, because a VCD-A and a VCD-B2 are not the same build.
BF · TVC · VCB · TVDCanned motor · BF / TVC / VCB / TVDTeikokuFour neighbouring codes in the same programme, met with the size figure in front and an execution suffix behind. The internal parts follow the exact string rather than the family, so a code shortened by one letter routinely reaches the wrong bearing set.
CSM 50 · CSM 65 · CSM 80Canned motor · CSMTeikokuA compact family written with the size after the letters. Bearings, thrust plates, cans and the gasket set are the usual scope, and the motor and the pump are one sealed body, so a winding fault is quoted as a unit matter rather than as a component one.
40X25 MSS · 50 MSS-J · 100 MSS-BH1M · MS · MSNCanned motor · MS / MSSTeikokuThe MS group is written in several forms, including a two-figure inlet and outlet pair in front of the letters. Copy the string exactly as it stands on the plate: the suffixes on this group are long, and they carry the execution the internal parts follow.
Atmos GIGA-IIn-line · single stageWiloGlanded in-line centrifugal pump with flanged suction and discharge on one centre line, a lantern, a coupling and an IEC standard motor. Wilo builds it for heating water, chilled water and water-glycol mixtures. The designation gives the connection size, impeller size, motor power and number of poles, and a suffix marks the variant: -L1 for a bronze impeller, -L4 for a stainless steel impeller, -P6 for back pull-out with a cartridge mechanical seal.
Atmos GIGA-NEnd suction · back pull-outWiloLong-coupled end-suction standard pump on a baseplate, which Wilo describes as its entry-level model among glanded pumps. The rotor unit pulls out to the back, and the spacer coupling lets the mechanical seal be changed without moving the motor. Impellers are made in grey cast iron, bronze or stainless steel, so the material belongs on the request.
SCPAxially split caseWiloHorizontal split-case pump, single- or two-stage, with a volute casing split along the shaft axis and a double-suction impeller (Wilo's type key also lists single-suction versions). The suction and discharge branches are cast with the bottom half, so the top half lifts off while the pipework stays in place. The shaft runs in a mechanical seal or in stuffing box packing.
Helix FIRST V · Helix VVertical multistageWiloVertical high-pressure multistage pumps with in-line connections and stainless steel impellers, stage housings and guide vanes. Helix FIRST V has a grey cast iron pump housing; on Helix V the pump housing is stainless steel as well. Both take either a plain mechanical seal or a cartridge seal, and the type string says which one is fitted.
SiBoost Smart (FC) Helix VPressure-boosting setWiloA factory-built water pressure set: two to four Helix V pumps in parallel on a galvanised frame with vibration absorbers, a diaphragm pressure vessel, a pressure sensor and gauge, shut-off and non-return valves for each pump and the Smart Controller SC. The FC version adds a frequency converter for the base-load pump. Set parts and pump parts are separate lines.

Service and identification notes

Wear patterns, duty context and plate-reading advice from the maker pages. They help scope a request; they are not designations.

Service and identification notes for this category: topic, context, maker and detail.
TopicContextMakerDetail
Pump, coupling and driver on a baseplateComplete unitsAllweilerMany shipboard installations are supplied as a mounted set. Coupling elements, guards, baseplate hardware and the driver identity are worth listing separately, since a vibration complaint is often a coupling or alignment matter rather than a pump matter.
Transfer and bunkering dutyThree-screw · larger framesAllweilerLarger screw frame sizes handle fuel transfer between tanks and bunker lines — high delivered volume at modest differential pressure. Pressure capability comes from the number of sealing chambers along the spindle, so on these frames it is the condition of the flanks and the bore, rather than the driver rating, that decides whether rated capacity is still reached.
Fire, bilge and sanitary setsStatutory serviceAzcuePumps serving fire main, bilge and sanitary systems usually carry documentation expectations beyond the mechanical fit. Flag those duties in the request so the route and paperwork question is settled before quotation.
Multiphase boosting systemsMultiphase pumpingBornemannBornemann's main oil and gas business is multiphase pumping: twin-screw pump systems for oil and gas production. Such a unit is read like any other Bornemann pump, by type code and serial, with the package plate where the pump sits on a skid.
Ballast, bilge & fire lineDuty contextDESMIBallast, bilge and fire-line installations where suction conditions are harsh and running is intermittent. Seal arrangement, priming provision and driver data must be stated with the pump identity.
Casing gaskets and coversStatic sealingDESMICasing gaskets, cover O-rings and drain plug seals are cheap to include and expensive to omit once the pump is open. They belong on the same RFQ as the rotating parts, listed against the same pump serial.
Coupling elements and alignmentDriveDESMIFlexible coupling elements degrade with heat, oil contact and misalignment, and a worn element accelerates seal and bearing wear downstream. Note the coupling make, size and element type — the coupling is frequently not the pump maker's own part.
Impeller erosion and cavitationHydraulicsDESMILeading edges thin out and vane suction faces show pitting just behind the leading edge, often carrying into the shroud. Pitting there points to suction-side conditions — strainer, sea chest or NPSH — so a like-for-like impeller alone may not settle the fault. Where a bronze impeller runs in a cast iron casing, the casing and casing wear ring are the anodic parts and lose metal first: inspect the ring bore and casing faces, not only the impeller, and note any sacrificial anodes fitted in the covers and their condition. Record the trimmed diameter that came out, because it rarely equals the nominal diameter of the family.
Modular pump buildsCentrifugal · ModularDESMIPumps assembled from shared hydraulic, sealing and bearing modules. Identification depends on the module combination recorded on the plate and in the order documents, so the family name alone is not enough to fix a spare.
Seal faces and face pairingSealingDESMISeawater carries sand, silt and marine growth straight into the seal chamber. The pairing wears, weeping appears at the seal chamber drain and a salt crust builds on the lantern/motor stool below it. The face material combination and elastomer grade decide the replacement — the seal size alone does not.
Seawater cooling serviceDuty contextDESMISeawater pumps serving the central cooler and the SW cooling line, and the fresh-water circulating pumps on the closed jacket and low-temperature circuits. The two duties are built in different wetted materials, so the circuit must be stated with the pump identity: a bronze or duplex build cannot be replaced from a fresh-water parts list of the same nominal size.
Self-priming unitsPrimingDESMISelf-priming pumps and separately mounted priming units on bilge, ballast and stripping duty. Vacuum unit elements, priming valves, non-return components and seal kits are requested as sets.
Shafts, sleeves and bearingsRotating assemblyDESMIFretting under the seal, corrosion at the sleeve shoulder and bearing housing bore wear usually surface together. When a shaft is ordered, state whether the sleeve, key, lock nut and bearing set are being renewed with it.
Wear ring clearance opening upClearancesDESMIAs the casing ring and impeller neck ring lose their fit, recirculation grows and the pump quietly falls below its duty point while sounding mechanically healthy. Ring bore, ring width and the matching impeller neck dimension should be measured before the RFQ is sent.
Eureka, Thune Eureka and Kværner Eureka on the same casingMaker identityHamworthyCG pumps were sold under several plates as the business changed hands, and parts lists for the family are shared across those names. A CG casing with a Eureka or Thune plate is the same pump identity for RFQ purposes, so send the plate as it reads and the CG code beside it.
Built-in relief and bypass valvesProtection deviceIMO ABSpring, cone or piston, seat and adjusting parts of the integral relief valve. It is an over-pressure protection device for a positive displacement pump — not a flow regulator — and its condition is worth stating in the request.
Mechanical seal variantsSealing arrangementIMO ABThe seal execution is encoded in the designation suffix, not the size figure — two ACG pumps of identical bore can carry different faces and elastomers because one was built for heated HFO at the booster and the other for distillate transfer. Give the suffix characters and the working temperature; where the plate is gone, the medium and the line temperature substitute for them.
Pump inserts and cartridgesRotating assemblyIMO ABIMO supplies the rotating assembly as a unit on most ACE and ACG frames: matched rotors in their liner, dropped into the casing that is already bolted to the foundation. Ordering at insert level reduces the clearance guesswork of rebuilding a worn body around new rotors, and on a pump whose casing is welded into a fuel line it is often the only route that does not need the pipework broken.
Bilge ejectorsWater-driven · bilge dutyKörtingBilges and engine rooms come first among the spaces Körting names for its bilge ejectors. The ejector is driven by seawater from one of the ship's own pumps and has no motor or shaft of its own, so ejector parts and anything needed on the supplying pump are separate lines.
Ballast tank, cofferdam and forepeak ejectorsWater-driven · ballast dutyKörtingKörting lists ballast tanks, cofferdams and the forepeak among the spaces its ejectors empty. An ejector reaches the residual water a centrifugal pump leaves behind, which is why one often sits on the stripping side of a ballast system and appears on the ballast piping diagram rather than in the engine-room drawings.
Chain locker and bow thruster ejectorsWater-driven · fore-ship spacesKörtingChain lockers and bow thruster rooms are on Körting's list too. These ejectors sit far from the engine room, often in spaces that are hard to reach, and the photograph of the plate is usually the first thing missing from the enquiry, so ask for it before the ship leaves port.
Grey and black water ejectorsWater-driven · sewage dutyKörtingKörting also names grey and black water among the media its ship ejectors handle. Here the suction side carries solids and fibre, so a blocked nozzle or mixing section is a more likely cause of lost suction than on a clean ballast line, and the medium belongs on the request.
Ballast serviceVertical centrifugalNaniwaIntermittent, high-flow duty with sediment and shell growth in the water. Over service life, wear ring clearance and impeller eye erosion decide how much of the rated duty the pump still delivers. Within a single deballasting operation the limit is different — as tank level falls, available NPSH drops and the pump approaches cavitation or loses suction, which is why ballast sets are commonly backed by a vacuum priming system for stripping.
Bilge & general serviceSelf-primingNaniwaA recirculation chamber lets the pump clear air from a lifted suction line. Failure to prime is usually traced to loss of the liquid charge in the priming chamber, air ingress at suction line joints, mud box covers or valve glands, or a leaking gland and scored sleeve. Worn impeller front clearance also matters directly here — in a self-priming pump that clearance is what generates the vacuum, so it is checked before the pump is condemned.
Central fresh water coolingVertical centrifugalNaniwaClosed-circuit duty running near-continuously. Wear is slower than on the sea water side, so the recurring items are the mechanical seal, bearings and casing gasket rather than the hydraulic parts.
Close-coupled vs separately coupledDrive arrangementNaniwaSome units carry the impeller on an extended motor or stub shaft; others use an intermediate shaft, a rigid coupling and their own bearing housing on the pump. The two arrangements need different shafts, sleeves and bearing covers even at the same hydraulic size.
Fire & emergency fireVertical centrifugalNaniwaClass-surveyed duty tested against a required pressure at a stated number of jets. Restoring a failed pressure test is generally a wear ring, impeller and seal question, and the survey context decides which route is acceptable. Note the split: the main fire pump sits in the machinery space, while the emergency fire pump is a separate unit sited outside it with an independent driver and its own priming arrangement, so its parts list and its survey context are not the same.
Packed gland vs mechanical sealSealing arrangementNaniwaOlder units frequently left the yard with a packed gland and lantern ring; many have since been converted to a cartridge mechanical seal. Confirm what is actually installed — the conversion changes the sleeve and the stuffing box parts, not only the seal.
Sanitary & domestic waterSelf-priming / centrifugalNaniwaSmall-frame units cycling on a pressure switch. Frequent starts load the bearings and seal faces, so ball bearings, seal kits and the lip seals and O-rings in the bearing covers are the common replacements. Short-cycling on this duty usually points at a waterlogged hydrophore tank rather than the pump.
Sea water coolingVertical centrifugalNaniwaMotor mounted on top of a lantern-type motor stool, single-stage impeller drawing from the sea chest line. Typically a cast iron casing with bronze (BC6 / CAC406) impeller and wear rings, stainless steel shaft, and a renewable sleeve through the stuffing box. Some sea water builds are all-bronze or aluminium-bronze — confirm from the nameplate or the section drawing. Impeller vane erosion and wear ring opening dominate the overhaul list.
Reading a Shin Shin codeType designationShin ShinThe code carries no capacity and no duty: it is a family letter group followed by a connection size and, on many executions, a suffix. That is why the pump serial and the system it serves are worth sending with it — the same code covers builds with different seal and material executions.
Ballast serviceDutyShinkoIntermittent, heavily loaded, often run with air entrained during stripping. Seal faces and shaft sleeves take the damage, and wear ring clearance opens faster than the running hours alone would suggest.
Bilge and general serviceDutyShinkoSolids in the pumped medium score seal faces and sleeves. Many of these units still run gland packing, so packing rings, the lantern ring and the sleeve are listed together with the gland studs and nuts.
Cooling seawater serviceDutyShinkoThe hardest life of any pump on board. Bronze impellers suffer cavitation and erosion-corrosion at the vane inlet edges and in the suction eye, wear rings open up, and seal faces suffer from silt drawn through the sea chest. Casing material on the nameplate must be read before any wetted part is requested.
Fire serviceDutyShinkoRarely run, surveyed regularly, and expected to reach rated head on demand. Requests are usually driven by a survey finding on capacity or on gland leakage, so the head and capacity figures on the nameplate belong in the RFQ.
Fresh water cooling serviceDutyShinkoCleaner water, longer intervals, but seal faces still glaze and coupling rubbers still harden with engine-room heat. Requests here are typically seal kits, gasket sets and bearings rather than complete hydraulic components.
Horizontal single-stage designationsHorizontalShinkoHorizontal single-stage set on a bedplate with a flexible coupling to the motor. Bearings sit in a separate bracket and the set is back pull-out, so the rotating element, sleeve and bearings can be withdrawn with the casing and pipework left connected. Casing and cover gaskets are usually renewed at the same opening. Designations vary across the horizontal range, so the code cast or stamped on the machine is read from the pump rather than assumed from the duty.
Taiko cooling circulation unitTaiko pump line · jacket and central coolingTaiko KikaiA jacket or central cooling unit runs continuously, so its request pattern is bearings, seal and coupling insert on a running-hours interval rather than hydraulic wear. Send running hours since the last seal change and say whether the weep shows at the seal or at the casing joint — that single observation decides whether the shaft sleeve goes into the request alongside the seal.
Taiko fire and combined bilge/fire unitTaiko pump line · fire and emergencyTaiko KikaiOn a Taiko fire or combined bilge/fire unit the number that decides the job is not rated head but the pressure held at the two most remote hydrants during the drill, because that is the figure the attending surveyor writes down. Ring clearance is what erodes it between drills. Send the drill pressure reading with the ring and impeller request and the scope usually settles in one exchange.
Taiko self-priming unit on bilge and drain dutyTaiko pump line · bilge and drainTaiko KikaiSelf-priming construction clears air from a dry suction line only as long as the priming chamber holds its liquid charge. So the request here is almost never the impeller: it is the priming-chamber internals, the non-return seat and the casing joint gasket — a Taiko unit on drain duty loses prime through a weeping joint long before it loses hydraulic performance. Send the suction lift the unit is asked to hold and the priming time recorded at the last test.
Taiko single-stage seawater centrifugal on ballast and GS dutyTaiko pump line · ballast and general serviceTaiko KikaiThe renewable ring pair is what an overhaul on this line consumes, not the impeller. Record the diametral ring clearance measured at the last opening and the shaft diameter at the seal from the Taiko sectional drawing — those two figures alongside the plate capacity in m³/h close a ring-and-impeller request with no part number at all.

This list indicates coverage. It is not stock on hand and not a claim of affiliation with any manufacturer.

In the field

Rarely one pump. Usually a row of them.

The first photograph is licensed and representative only, not a Vessel Core installed reference or completed job — photo: NAC, Wikimedia Commons, CC BY-SA 4.0. The second and third are Vessel Core's own, taken aboard a vessel during a yard visit in July 2026 and published with the owner's permission. The fourth is Vessel Core's own, taken aboard a vessel during a client visit in October 2026; that vessel is not named. No manufacturer is identified in any of the four: the stencilled markings give a service and a unit number, not a maker, and no maker plate is legible at published resolution. None of this is a claim that Vessel Core supplied or worked on the equipment shown.

What to send

Send enough context to identify the pump and the operating system.

Part numbers are helpful but not always available. A nameplate photo, pump drawing, manual page or installed pump photo can be enough to begin technical cross-checking before supply routes are reviewed. For wet-end parts, add what the model name does not carry: the impeller diameter actually fitted (impellers are often trimmed to the ordered duty point), the casing and impeller material from the plate or section drawing, and whether the shaft runs a mechanical seal or gland packing. The size in an end-suction pump’s designation, such as 65-50-160 or NK 50-250/241, is taken apart by the end-suction pump size reader: the nozzles, the nominal impeller and, after a Grundfos slash, the impeller actually fitted. For gland packing, the gland packing calculator works out the section, the rings and the length from the shaft, bore and depth. For a mechanical seal, the mechanical seal material code reads EN 12756 letters such as BQ1EGG. For a seal built to EN 12756 dimensions, the mechanical seal size finder gives the installation length from the shaft diameter. A rolling bearing carries its own designation on the ring; the bearing designation reader splits it into type, bore and suffixes for the request. Where that bearing is regreased in service, the bearing grease quantity calculator gives the grease to add from the outside diameter and the width, Gp = 0.005 x D x B, and the strokes of the grease gun. When the pump itself is being replaced, the flange identifier reads the suction and discharge flange drilling, and the motor nameplate reader the drive motor’s plate. For a replacement pump, the pump power calculator gives the shaft power from the flow and head, and the affinity laws calculator shows what a centrifugal pump delivers on another supply frequency. The parallel key finder names the key on an impeller or coupling from the shaft diameter. For the spring of a built-in relief valve, the compression spring calculator gives the rate and the load at the fitted length from the wire, the outside diameter and the coils, so a replacement spring can be set against the old one. The RFQ evidence checklist takes the same fields in order, and RFQs without a part number shows how a request starts from the plate alone. The tools for pumps are also gathered on one view of the measurement tools page.

Vessel and timing

  • Vessel name / IMO
  • Company name
  • Urgency level
  • Port / ETA

Pump reference

  • Maker
  • Model
  • Serial number
  • System served

Part request

  • Part number
  • Description
  • Quantity
  • OEM / alternative / both

Attachments

  • Photos
  • Nameplate
  • Drawing
  • Excel list
Pump RFQ FAQ

Short answers for technical buyers.

Can you quote without a pump part number?

Yes. Send maker, model, serial number, pump nameplate, installed pump photos, drawings or manual pages. The request can be structured from technical context.

Can you handle time-critical pump failures?

Time-critical requests should include vessel / IMO, port, ETA and system criticality. That allows the supply route, availability and documentation work to be aligned with timing. Lead time is confirmed only in the quotation.

Can Vessel Core review OEM-route and verified alternative supply?

Yes. The supply route can be reviewed against approval needs, lead time, budget logic and equipment criticality. Where class requirements apply to the work, an OEM-route review can be requested. The offer can clarify which route is being proposed.

Send pump RFQ

Have a pump spare parts request?

Send pump maker, type/model, system, part number or description, quantity and port/ETA. If part numbers are missing, send photos, nameplates, drawings or an Excel list directly to sales@vesselcore.eu.