Marine Compressor Spare Parts Supplier

Compressor spare parts supplier

Compressor RFQs handled around the installed machine and onboard role.

Vessel Core supplies technical buyers with marine compressor spare parts for starting air, service air and refrigeration applications. Where a starting air compressor is suspected of low output, the receiver fill test calculator works out its free air delivery from a timed receiver fill. On the service and control air side, the pneumatic cylinder air calculator adds up the free air the pneumatic cylinders and actuators take per minute. Where a dryer serves the control air, the dew point calculator turns the pressure dew point read after it into the atmospheric dew point, or back, at the line pressure.

The request can include exact part numbers or begin from compressor maker, model, serial number, nameplate photos, manual pages or component photos. The supply route is reviewed against urgency, approval needs and delivery timing; lead time is confirmed only in the quotation.

See the starting air system on the engine room map →

Supply scope

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

Commercially useful spare parts supply coverage for planned overhaul, time-critical compressor faults and engine-room supply review. Compressor maker names and series codes appear on this page only to identify the machine on board: Vessel Core holds no dealership, distribution, representation or partnership agreement with Sabroe, York, Carrier, Daikin, MYCOM, Bitzer, Bock, GEA Grasso, Atlas Copco, Deno or any other manufacturer, and does not present itself as holding one.

01

Starting air compressors

Valve assemblies, piston rings, gaskets, liners, coolers and overhaul parts for the piston compressors that charge the starting-air receivers. Starting-air makers with their own pages here: Sperre (HL and HV frames), J.P. Sauer (WP designations), Hatlapa (W-series) and Tanabe (H-series), with Atlas Copco LT machines also met on the same duty. On any of them, name the stage the part belongs to and whether the machine is air- or water-cooled: first- and second-stage valves and rings are different items, and cooler parts do not interchange between the two builds. For the receivers themselves, the air receiver calculator gives the filling time between two pressures from the receiver volume and the compressor delivery.

02

Service air compressors

Valves, piston rings, filters, gaskets and coolers for working and service air compressors. Atlas Copco LT piston machines and Deno units both turn up on service and control air duty, and on either one the designation read off the plate matters more than the description of the machine: the same LT letters cover an air-cooled build and the water-cooled LT KE, which are different machines, so cooler, fan, jacket, valve and ring parts do not interchange between them. Where the service air comes from a screw machine rather than a piston machine, say so on the request: the wear items become the screw element, the oil separator and the filters instead of valves and rings.

03

Refrigeration compressors

Valve plates, shaft seals, gaskets, drive coupling elements and refrigeration compressor spares. Sabroe machines, later nameplated under York, carry the family in the type code — the CMO and SMC reciprocating frames are the ones most often named on provision and cargo plant enquiries, and the mark number after the type decides which valve and ring parts apply. Carrier reciprocating units come from the 5F and 5H families, MYCOM frames from the A and B reciprocating series, and Daikin plant is identified from the compressor plate rather than from the label on the unit. On any of them send the refrigerant with the type: a shaft seal and a gasket set for an ammonia machine are not the same items as for a halocarbon one. The refrigerant number reader decodes the number on the plant plate, such as R-404A or R-717.

04

Compressor valves

Suction and delivery valve assemblies, concentric valve assemblies, valve plates, springs, seats and unloader components. A valve plate follows the compressor frame and not the cabinet or room it serves, so the model line taken off the compressor itself is what opens the enquiry: Bitzer semi-hermetic frames, Bock open-drive units and GEA Grasso open-drive reciprocating machines each carry their own plate and gasket references, and a semi-hermetic frame also needs the terminal-plate and motor-side gaskets that an open-drive machine has no place for.

05

Piston rings

Piston rings, piston assemblies, cylinder wear items and matched overhaul parts.

06

Gaskets and filters

Gasket kits, O-rings, air filters, separator elements and filtration items.

07

Coolers and liners

Intercoolers, aftercoolers, cooler elements, cylinder liners and heads.

08

Overhaul kits

Grouped service kits and repair kits for scheduled compressor maintenance.

09

Instrumentation and safety valves

Safety valves, pressure gauges, pressure switches, temperature sensors and compressor automation components.

Model index

43 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.

Filter by model, maker or part

43 models · 27 notes

Model index for this category: designation, series, maker and the parts typically requested.
Model	Series	Maker	Typical parts
LT series	LT · two-stage piston	Atlas Copco	LT is the two-stage oil-lubricated piston range, the one reached for on starting air duty, with LE naming the lower-pressure counterpart in the same programme. Concentric valve assemblies, piston ring sets, gasket and seal kits and cooler elements are the recurring lines; the frame size in the type code is what the parts follow.
LT KE	LT · water-cooled cast iron	Atlas Copco	The KE execution is the water-cooled cast iron build for marine starting air systems, and it is a different machine from the air-cooled aluminium one under the same LT letters. State which is fitted before valves, rings or cooler parts are quoted.
BM 5.1/30-7.5-V · BM 6.1/30-11-V · BM 10.1/30-15-V	Bauer BM series · two-stage	Bauer	Bauer's air-cooled, direct-coupled starting-air compressors for shipping, built with two stages in the lower pressure class. Every stage has its own safety valve, an integrated oil pump lubricates the main components, and intermediate separators with automatic condensate drainage are standard. Requests usually cover the valves for each stage, ring sets, drain valves and the elastic coupling element.
BM 20.1/40-30 · BM 30.1/40-45 · BM 60.1/40-90 · BM 70.1/40-110	Bauer BM series · three-stage	Bauer	The larger three-stage BM frames, which Bauer presents for ship installations, use on board and offshore duty. Classification approval by DNV, ABS or RINA is listed as an option, so a unit delivered with a class certificate is quoted with that certificate in view. A third stage means a third set of valves, rings and a third safety valve on the list.
I 15.1-7.5-V · I 15.11-11-V · I 18.1-15-V	Bauer VERTICUS series	Bauer	Air-cooled high-pressure units for air and nitrogen in a vertical layout, with a self-tensioning V-belt drive and the B-DRAIN automatic drain on the intermediate and final separators. Bauer's tables list some of these designations, such as I 15.11-11-V, in two pressure classes, so the final pressure from the plate has to travel with the designation.
I 100-3-MV · I 120-5.5-MV · I 12.14-7.5-MV	Bauer MINI-VERTICUS series	Bauer	Compact vertical high-pressure units for air and nitrogen. Bauer offers an integrable P 61 or P 81 purification system on them, so the cartridge type and the filter housing belong in the same request as the valves, piston rings and V-belt.
PE 100-3-VE · PE 120-5.5-VE · PE 180-15-VE	Bauer PE-VE series	Bauer	Bauer's compact high-pressure package for air and nitrogen where space is tight, delivered with B-CONTROL MICRO control and B-DRAIN as standard. The -VE-420 builds are separate designations in Bauer's tables, so copy the ending in full rather than shortening it to the family name.
IB 23.0-30 · I 26.0-55 · I 52.0-110 · B 26.4-55	Bauer I and IB series · water-cooled	Bauer	Water-cooled high-pressure units for air and nitrogen, plus the B 26 medium-pressure counterpart. Bauer describes targeted water cooling of the block, the valve heads, the intercoolers and the aftercoolers on these series, built on its BK 23 to BK 52 blocks, and says its block design makes cylinder water jackets unnecessary. A plate heat exchanger set is offered to keep seawater out of the compressor circuit.
4NES · 6FE	Semi-hermetic reciprocating	Bitzer	The semi-hermetic reciprocating frames met on provision and air-conditioning plants. Valve plates, gasket sets, piston and ring sets and the oil pump items are the usual lines; the refrigerant and the oil charge belong in the request with the type.
5F 20 · 5F 30	5F · reciprocating	Carrier	The 5F frames are long-serving reciprocating machines, and parts lists for them are drawn per frame rather than per plant. Oil pump, crankshaft, bearings, pistons, valve assemblies and the discharge valve set are the recurring lines.
5H series	5H · reciprocating	Carrier	The 5H frames sit beside the 5F in the same programme and share the way they are enquired about: frame size, refrigerant and the driver arrangement. State the frame from the compressor plate rather than from the plant nameplate, because one plant can hold more than one machine.
C 55 · 4C 55 · 6C 55 · 8C 55	C series · reciprocating	Daikin	The C codes are written with the cylinder count in front of the size, and the letters and figures after it carry the execution. Valve plates and reeds, piston and ring sets, gasket kits, shaft seals and bearing sets are the usual scope.
HC 55 · 4HC 55 · 6HC 55	HC series · reciprocating	Daikin	The HC codes are the neighbouring family, and the extra letter is not decoration: parts are drawn per code. Longer strings such as 4HC552B-UC appear on parts lists, so copy the marking in full from the compressor plate.
2L · 3L · L3 · L4 · L2-20 · L2-35	L · starting air piston	Deno	The L codes are the multi-stage direct-driven starting air piston machines, written both as 2L and 3L in front of the size and as L2 and L3 with the size after it. Valve assemblies, piston and ring sets, crankshaft and connecting rod bearings, gasket sets and cooler elements are the usual scope.
DSA · DSD	Screw compressors	Deno	DSA is the belt-driven and DSD the direct-driven rotary screw programme. A screw machine is enquired about differently from a piston one: the air end, the oil separator element, the filters, the thermostatic valve and the coupling are the items, and the drive execution is part of the identity.
DPA	Service air piston	Deno	The DPA machines are the air-cooled belt-driven piston compressors on service air duty. Belts, valve assemblies, rings, gaskets and the intake filter are the recurring lines, and the service air machine is worth naming separately from the starting air one when both are on the same request.
V · VT	Open-drive reciprocating	GEA Grasso	The V and VT series are open-drive reciprocating machines met on larger refrigeration plant. Shaft seal, valve plates, piston and ring sets, connecting rod bearings and the oil pump are the recurring lines; on ammonia plant the refrigerant and the approval paperwork held aboard belong with the request.
2TM · 2TF	Starting air compressors	Hamworthy	Starting air compressors on Hamworthy enquiries appear as 2TM, with variants such as 2TM6, 2TM62, 2TM63, 2TM67 and 2TM68, and as 2TF with 2TF5 and 2TF54. These designations come from third-party parts listings rather than maker documentation, and the support lineage for these machines ran from Hamworthy KSE to Hatlapa to MacGregor, so the plate and the supporting house no longer carry the same name.
W110	W-series · smaller frame	Hatlapa	Smaller-frame starting-air unit, often installed as the topping-up or second compressor. Requests typically cover concentric valve assemblies, piston ring sets, oil scraper rings and crankcase seal kits.
W140	W-series · mid frame	Hatlapa	Mid-frame unit found on general cargo, coaster and workboat installations. Cylinder and piston sets, big-end bearings, safety valves and cooler elements are the common items.
W220	W-series · larger frame	Hatlapa	Larger free air delivery for main-engine starting duty on bigger installations. Valve seats and plate stacks, HP piston assemblies, intercooler tube stacks and unloading valve components.
W330	W-series · larger frame	Hatlapa	Larger frame within the range shown here; the W-series continues above this size. Main bearings, big-end bearings, connecting rod bolts, cylinders, aftercooler elements and separator internals are typical overhaul-scope requests.
Hurricane series	Series	J.P. Sauer	High-pressure arrangements used where breathing air or elevated final pressure is required, reaching well beyond a starting-air machine's rated pressure. Purification-stage cartridges, separator elements and high-pressure fittings sit alongside the usual mechanical wear items.
Passat series	Series	J.P. Sauer	Starting-air and control-air packages built around the same reciprocating core. Valve plates, springs, unloader components and pressure switches are the recurring consumables.
WP15L	Type designation	J.P. Sauer	Compact low-throughput unit typically found on emergency and topping-up duty. Requests usually concentrate on suction and delivery valve assemblies, first- and second-stage rings, and the small-bore liner.
WP81L	Type designation	J.P. Sauer	Mid-range machine built for starting air and general working air. Piston and guide rings, stage valve sets, intercooler elements and condensate drain components dominate the RFQ traffic on this size.
WP311L	Type designation	J.P. Sauer	Larger WP unit charging main-engine air receivers. Crankshaft and connecting-rod bearings, cylinder liners, aftercooler elements and safety valve components appear more often here because duty cycles are longer.
MSO compressor (FSRU)	Vertical reciprocating · FSRU	Kobelco	Kobelco also lists vertical reciprocating machines as MSO compressors on floating storage and regasification units. Treat one as a machine in its own right: send the plate and the parts-list page rather than assuming it shares items with an LNG carrier fuel gas unit.
N4B · N6BM · N12B	N · reciprocating	MYCOM	The reciprocating codes are written with the cylinder count between the letters, and a trailing letter marks the execution. Valve plates and springs, piston and ring sets, shaft seal, gasket kits and bearing sets are the usual scope.
CMO 24 · CMO 26 · CMO 28	CMO · reciprocating	Sabroe / York	The CMO units are the smaller reciprocating machines of the programme, met as stand-alone or backup compressors. Valve plates, piston and ring sets, shaft seal, gasket kits, oil pump items and bearing sets are the recurring lines.
SMC 104 · SMC 106 · SMC 108	SMC · reciprocating	Sabroe / York	The SMC frames are the medium-sized reciprocating machines and the ones met most often on marine plant, with TSMC and TCMO naming related builds. Requests cover valve plates and springs, liners and pistons, the shaft seal, connecting rod bearings and complete gasket sets.
SBO 21 · SBO 22	SBO	Sabroe / York	SBO is an older group still read off plates on working plant, and parts lists for it are drawn per frame. Send the frame from the compressor plate together with the refrigerant, because the elastomers in a gasket set follow the refrigerant and the oil.
BFO 3 · BFO 4 · BFO 5	BFO	Sabroe / York	The BFO frames are enquired about as complete overhaul scopes more often than as single items: valve assemblies, pistons and rings, bearings, shaft seal and the gasket set together. The designation is written both as BFO 3 and BFO3 on parts lists, so both spellings find the same machine.
SAB · SGC	Screw compressors	Sabroe / York	Larger screw compressor units used on bigger reefer and industrial installations, less common on general cargo tonnage. Rotor sets, bearings and shaft seal parts are ordered against the unit serial rather than the family name.
HL2/77	Sperre HL family · air-cooled	Sperre	Compact air-cooled two-stage frame typical of smaller vessels, standby duty and topping-up service on a second receiver. There is no cooling-water jacket to drain here — the cylinders are finned castings. Short filling cycles make valve plates and piston ring sets the items most often replaced on this frame.
HL2/105 · HL2/120	Sperre HL family · air-cooled	Sperre	Mid-range HL2 frames. Requests can cover valve plate and spring sets, piston ring sets, gudgeon-pin bushes, and the gasket and O-ring set needed to close the unit after a top overhaul. State whether the frame is splash-lubricated or carries a crankshaft-driven oil pump.
HV1 / HV2 — vertical two-stage, water-cooled	Sperre HV family · water-cooled	Sperre	Vertical frames with a large-bore first stage and a small-bore second stage on one crankshaft, jacket-cooled and coupled to a foot-mounted motor. Wear concentrates in the valve plates and in the second-stage ring pack, which works against the highest differential pressure in the machine and takes any moisture carried over from the intercooler.
HV2/120 · HV2/140	Sperre HV2 series	Sperre	Mid-capacity twin-cylinder frames on general cargo, ferry and offshore tonnage. Enquiries usually cover suction and discharge valve assemblies for both stages, ring sets, and the intercooler nest between the stages.
HV2/210	Sperre HV2 series	Sperre	A larger water-cooled HV2 frame on starting-air duty, with the rated working pressure stamped on the crankcase plate rather than published here. HV2/210 requests can include first- and second-stage liners, complete valve assemblies, connecting-rod bearing shells and the crankshaft seal. Confirm the serial and rated pressure from the plate.
H-63	H-series	Tanabe	Two-stage water-cooled starting-air compressor in the H family. Valve assemblies, ring sets and intercooler tube stacks are the recurring line items on requests naming this machine.
H-64	H-series	Tanabe	H-family machine in a different size band from the H-63, so seat diameters and ring sections can differ between the two. Confirm the machine number stamped on the crankcase before rings or liners are ordered.
H-73	H-series	Tanabe	Larger H-family frame, seen where the main engine air receivers call for a higher charging rate. Requests commonly cover main and crankpin bearing shells, ring sets and delivery valve assemblies.
H-74	H-series	Tanabe	H-family machine in the larger size band. Aftercooler tube stacks, unloader components and lubricating oil pump parts appear alongside the standard valve and ring scope.

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.
Topic	Context	Maker	Detail
Valve, ring and gasket sets	Overhaul items	Atlas Copco	On a starting air compressor the parts that decide whether the main engine turns are the valve assemblies, the rings and the gaskets, and they are ordered as sets against the compressor serial. Add the safety valve, the unloader and the oil level items to the same list, since a stripped machine is open only once.
Motor inside the housing	Semi-hermetic identity	Bitzer	On a semi-hermetic machine the motor sits inside the compressor body, so a winding fault is answered as a unit matter rather than as a component one. That is the fork in the request: valve plate, gaskets and rings are parts, a burnt motor is an exchange, and the two are quoted differently.
Open-drive reciprocating units	Open drive	Bock	Bock machines are met in the open-drive reciprocating group, where the motor is separate and the crankshaft passes through a shaft seal. That seal is the wear item an open machine adds over a semi-hermetic one, and it belongs on the request beside the valve plate, gaskets and ring set.
Air-cooled builds	Cooling arrangement	Hatlapa	Finned cooler sections and fan-side components replace the water-side hardware. Cooler section, fan wheel and guard part references do not carry over from a water-cooled machine of the same type number.
Coupling and drive side	Drive arrangement	Hatlapa	Flexible coupling elements, drive bushes and mounting hardware differ between direct-coupled and belt-driven installations. A photograph of the drive end usually settles which arrangement is fitted.
Legacy W-frames	Older and superseded frames	Hatlapa	Older W-series machines still in service may reference part numbers that have been superseded. Serial number and a nameplate photograph are needed before any current reference is treated as equivalent. The type may be stamped with or without a space — W 110 and W110 are the same machine — and later units may be nameplated under the MacGregor group. Larger and smaller W-frames outside the four shown here are handled on the same evidence.
Water-cooled builds	Cooling arrangement	Hatlapa	Intercooler and aftercooler tube stacks, cooler covers, jacket seals, water-side gaskets, and zinc anodes on seawater-cooled builds. State the cooling arrangement on the request — it changes a large share of the parts list.
Air handling units	Accommodation air · AHU	Heinen & Hopman	The central units that treat and move air for the accommodation: fan and motor, cooling and heating coils, filters and dampers in one casing. Fan bearings, belts, filters and coil repairs are the recurring lines. The unit plate fixes the drawing they are read against, and where a frequency drive runs the fan, its own plate goes in the request too.
Cabin units	Accommodation · cabins	Heinen & Hopman	Cabin and room units take conditioned air from the central plant and finish it locally; on some passenger ships they work with variable air volume. Dampers, reheaters where fitted, small fans and the room controller are the usual items, and the controller may carry another maker's label.
Ventilation fans	Supply and exhaust air	Heinen & Hopman	The fans that move supply and exhaust air through the ship, built into Heinen & Hopman systems. Impeller, bearings, motor and, on belt-driven fans, belts and pulleys are the parts lines. The fan plate and the motor nameplate are read separately, because the motor is often a standard frame from a motor maker.
LeBlanc · Teknotherm on the plate	Maker identity	Heinen & Hopman	Two companies joined the Heinen & Hopman group and kept their own names: LeBlanc & Associates of Houma, on the US Gulf coast, in 2014, and the refrigeration maker Teknotherm Marine, in which Heinen & Hopman took a majority stake in 2015. A plate reading either name is read as it stands, with its own serial.
Air-cooled and water-cooled builds	Build variants	J.P. Sauer	Sauer normally carries the cooling arrangement in the type code itself — the suffix on the WP designation distinguishes the air-cooled build from its water-cooled equivalent. Send the full designation including suffix letters, since cooler elements, fan wheels, cooling water connections and temperature switches do not cross between the two builds.
Breathing-air packages	Duty variants	J.P. Sauer	Where the machine feeds SCBA or escape-set charging, final pressure is well above a working-air unit's and the stage count rises accordingly — state the rated pressure from the plate. Filter cartridges, separator elements and moisture-monitoring items carry documentation expectations that plain working-air spares do not.
Other WP designations	Type designation	J.P. Sauer	The WP designations span many intermediate sizes and build revisions. A type code on its own rarely settles a part; the series name, the serial and the stage count decide which of several superseded assemblies applies.
Screw compressor for X-DF and ME-GA fuel gas	Oil-injected screw · fuel gas	Kobelco	Kobelco calls these oil-injected, or oil-flooded, screw compressors; in 2016 Kobe Steel announced the first order for screw compressors to supply fuel to X-DF dual-fuel engines. Boil-off gas is warmed in a pre-heater, passes a filter and a check valve and is compressed in a single stage, and Kobelco's oil-injected screw range sets capacity with a slide valve. Typical items are suction filter elements, coalescing elements for the secondary oil separator, oil cooler and pre-heater parts, and temperature control valve parts.
Six-stage reciprocating compressor for ME-GI gas supply	Vertical reciprocating · ME-GI	Kobelco	A vertical machine that raises boil-off gas to the injection pressure of the ME-GI engine and also feeds the dual-fuel generator engines and the re-liquefaction plant. Stages one to five run with non-lubricated cylinders; only stage six, where friction is highest, receives lubricating oil, with an oil separator after it. Resin piston rings, rider rings and piston rod packings are the main consumables.
Three-stage non-lubricated compressor for X-DF re-liquefaction	Vertical reciprocating · re-liquefaction	Kobelco	Where an X-DF ship boosts its surplus gas for re-liquefaction with a reciprocating compressor, Kobe Steel's machine for that duty takes the gas from the screw compressor and works without any cylinder lubrication. Kobe Steel standardised its cylinder design with stages three to five of the ME-GI machine to keep the range of consumables small, so a ring or packing request should name the machine and the stage, not only the maker.
Screw compressor frames	Screw	MYCOM	A screw-programme enquiry starts from the frame and the drive arrangement rather than from the plant. Rotor sets, bearings, shaft seal, the oil separator element and the slide valve items are the components, and the frame designation on the compressor plate is what they follow.
Sabroe plate, York or Johnson Controls paperwork	Maker identity	Sabroe / York	The compressor plate, the plant documentation and the invoice can each carry a different one of these names, and the type designations did not change between them. Send the plate as it reads and the type code beside it; the corporate name is context rather than identity.
30 bar starting-air duty	Duty context	Sperre	Starting-air frames are normally rated around 30 bar to the receiver, with an interstage relief valve, a final safety valve and a non-return valve in the delivery line. Relief settings and the delivery-line arrangement belong in the enquiry.
Moisture carryover into the second stage	Cooling and drains	Sperre	If the intercooler drain is neglected the separated condensate is carried forward with the charge; and if cooling water runs hotter than the design point, moisture stays as vapour past the separator and condenses in the second stage and the receiver. Water strips the oil film off the second-stage bore, accelerates ring and liner wear, scores the running surface and corrodes the valve seats. The same neglect leaves oil carryover and carbonised deposits in the delivery line, the recognised precursor to a starting-air line explosion. A unit that consumes rings twice as fast as its sister machine is usually telling you about drains, not about the rings.
Older HV1 and HL2 frames	Earlier builds	Sperre	Long-serving HV1 and HL2 units still run on coasters, fishing vessels and harbour craft. Valve and liner details changed across build years, so a part-book page or an earlier order line for the same serial carries more weight than the frame name.
Ring pack and bearing wear	Running gear	Sperre	Blow-by past the first-stage rings shows up as crankcase pressure and rising oil consumption before it shows up as lost capacity. Once the ring pack collapses, blow-by and skirt contact scuff the bore and the piston has to come out with the rings. Further down, big-end shells and gudgeon-pin bushes wear past their clearance limits, oil delivery to the running gear falls off, and the crankshaft seal begins to weep onto the tank top.
Unloader and safety valve faults	Control and protection	Sperre	A sticking unloader lets the machine start against full delivery pressure, which trips the motor overload and loads the bearings on every start. Safety and relief valves that have been lifting repeatedly rarely reseat cleanly afterwards. Both belong on the parts list whenever a top overhaul is planned rather than being left for a second enquiry.
Valve plate fatigue from short cycling	Valve gear	Sperre	The thin concentric plate flexes against its seat on every revolution. When a receiver non-return valve leaks back, or when air consumption keeps the machine cutting in and out, the plate accumulates cycles far faster than the running-hour counter suggests. The result is a fatigue crack, then a broken plate, then debris carried into the second stage. Symptoms are longer filling time and a hot delivery line. The interstage gauge tells you which stage: pressure below normal points to a first-stage valve, pressure above normal — up to the interstage relief lifting — points to a second-stage valve or a fouled intercooler.
Working and service-air frames	Duty context	Sperre	Lower-pressure service-air machines from the same families use a different unloader arrangement and pressure-switch setting. State the duty, because two frames with the same designation can carry different control components.
Nameplate missing	Unlabelled or repainted units	Tanabe	Where the plate has been painted over or replaced, the machine can still be narrowed down from crankcase casting marks, cylinder centre distance, flywheel diameter and photographs of the valve cages and cooler end covers.

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

In the field

The machines that decide whether the main engine starts.

Two starting air compressors mounted on a two-tier frame in a ship engine room, with their air receivers alongside — Starting air compressorsTwo units on a two-tier frame with their receivers. A two-stroke main engine turns over on stored air, not on a starter motor.

Two starting air receivers stacked in a ship engine room, with an isolating valve, pressure gauge and drain pipework at the head of the lower vessel — Starting air receiversThe stored air the engine actually turns over on. Isolating valve, gauge and drain sit together at the head of the receiver, which is where most receiver-side requests are photographed from.

Two reciprocating refrigeration compressors on a common frame in a ship engine room, one terminal box hand-numbered 2, a gauge board below — Refrigeration compressors, numbered 1 and 2The other half of this page. Duty and standby on one frame, terminal boxes above, gauge board below. On board they are told apart by the numbers painted on the covers; for an RFQ, the model comes from the nameplate on the compressor itself, so photograph that as well.

The first photograph is licensed and is representative only, not a Vessel Core installed reference or completed job — photo: Eduard47, 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 September 2026 and published with the owner's permission. No manufacturer is identified in any of the three: the plates in the frames are illegible at published resolution and none was recorded on site. 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 compressor and part family.

Part numbers are helpful, but nameplates, manual pages, photos and serial numbers can be enough to start cross-checking before supply routes are reviewed. For valve, ring and liner lines, add the stage the part belongs to and whether the machine is air- or water-cooled; for a refrigeration compressor, add the refrigerant and the oil, because seal and gasket elastomers follow both; for a screw machine, say so, since the wear items become the air end, the oil separator element and the filters. The RFQ evidence checklist takes these fields in order, and for an electrically driven compressor the motor nameplate reader explains the motor plate.

Vessel and timing

Vessel name / IMO
Company name
Urgency level
Port / ETA

Equipment reference

Maker
Model
Serial number
Equipment application

Part request

Part number
Description
Quantity
OEM / alternative / both

Attachments

Photos
Nameplate
Drawing
Excel list

Related categories

Connect this RFQ to the wider engine-room supply scope.

Compressor RFQ FAQ

Short answers for technical buyers.

Can you quote without a compressor part number?

Yes. Send maker, model, serial number, nameplate photo, compressor photos, drawings or manual pages so the request can be structured technically.

Can you handle time-critical compressor failures?

Yes. Add vessel / IMO, port, ETA and whether the compressor is starting air, service air or refrigeration. This helps prioritize the supply route.

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

Yes. OEM-route and verified alternative supply routes can be reviewed depending on equipment criticality, approval requirements, lead time and budget logic. Lead time is confirmed only in the quotation.

Send compressor RFQ

Have a compressor spare parts request?

Send compressor maker, model, serial number, application, part reference or description, quantity and port/ETA. Photos, nameplates, drawings or Excel lists are welcome.

Submit RFQ Email sales@vesselcore.eu

Marine Compressor Spare Parts Supplier

Compressor RFQs handled around the installed machine and onboard role.

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

Starting air compressors

Service air compressors

Refrigeration compressors

Compressor valves

Piston rings

Gaskets and filters

Coolers and liners

Overhaul kits

Instrumentation and safety valves

43 models in this category, filterable.

Service and identification notes

The machines that decide whether the main engine starts.

Send enough context to identify the compressor and part family.

Vessel and timing

Equipment reference

Part request

Attachments

Connect this RFQ to the wider engine-room supply scope.

Engine Room Equipment

Hatlapa Compressor Parts

J.P. Sauer & Sohn Compressor Parts

Sperre Compressor Parts

Tanabe Compressor Parts

Sabroe Compressor Parts

Atlas Copco Compressor Parts

Deno Compressor Parts

Bauer Compressor Parts

Kobelco Compressor Parts

Heinen & Hopman HVAC Parts

Supply Route Advisor

Marine RFQ Glossary

Filters, Gaskets & Seals

Valves & Pipe Systems

Electrical & Control

Sensors & Safety

Supply Process

Short answers for technical buyers.

Can you quote without a compressor part number?

Can you handle time-critical compressor failures?

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

Have a compressor spare parts request?

Essential

Analytics

Marketing

Marine Compressor
Spare Parts Supplier