MYCOM Compressor
Parts Supplier
N series reciprocating · screw compressor frames
What a MYCOM compressor marking actually names
MYCOM builds both reciprocating and screw compressors, and the two programmes are told apart by the code or frame designation stamped on the machine itself rather than by the plant name.
N4B · N6BM · N12B
In a reciprocating code the leading letter is the refrigerant (N for ammonia, F for fluorocarbons, P for propane, C for CO2), the figure is the cylinder count, a two-figure group such as 42 or 62 marks a compound two-stage machine, and the letters after it name the series, such as B, WA, WB, K, M or HK. Valve plates and springs, piston and ring sets, shaft seal, gasket kits and bearing sets are the usual scope.
Screw compressor frames
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.
Mayekawa Mfg. Co., Ltd. — the name behind MYCOM
Mayekawa was founded in Tokyo in 1924 and established MYCOM as its compressor brand in the early 1960s. Its own history records an ammonia pump-recirculation refrigeration system for fishing vessels in 1965, its first screw refrigeration compressor on a large refrigeration mother ship in 1969 and a screw compressor in a deep-sea trawler in 1975 — the reciprocating and screw programmes seen on board today carry that same maker name.
A reciprocating code and a screw frame are not read the same way
MYCOM's reciprocating and screw compressors are both ordered from a marking on the machine, but a reciprocating code and a screw frame designation are not interchangeable information.
A reciprocating code such as N4WA or N6HK reads in three parts: the leading letter is the refrigerant the machine was built for (N for ammonia, F for fluorocarbons), the figure is the cylinder count, and the letters after it name the series. None of it is decoration: an A-series and a WA-series machine with the same cylinder count belong to different generations, and the refrigerant letter tells which medium the seals and gaskets must suit, so the code goes into the request exactly as stamped, any further suffix included.
The screw programme is a different machine entirely, and an enquiry for it starts from the frame and the drive arrangement rather than from the plant it serves — one plant can carry more than one compressor. Rotor sets, bearings, the shaft seal, the oil separator element and the slide valve items are what the screw programme actually draws on, and the frame designation read off the compressor plate is what opens that request.
What a MYCOM programme resolves to
Grouped by programme, because the N-series reciprocating machines and the screw frames are inspected differently and do not draw on the same parts.
- Valve plates and springs for the N series
- Piston and ring sets for the N series
- Shaft seal and gasket kits for the N series
- Bearing sets for the N series
- Rotor sets and bearings for the screw programme
- Shaft seal and the oil separator element for the screw programme
- Slide valve items for the screw programme
The trailing letter on an N-series code and the frame designation on a screw compressor are what an inspection checks first on either MYCOM programme — naming them before the rest of the list keeps a request from returning with a question.
Plate data that makes a MYCOM enquiry quotable
The compressor's own plate is the fastest route to a correct match. With the items below an enquiry can usually be priced in one pass; without them it comes back with a clarifying question first.
- Programme — N-series reciprocating or screw
- Full reciprocating code as stamped, with the refrigerant prefix, cylinder count and series letters, such as N4WA or N62WA
- Screw model designation as stamped, with its refrigerant prefix and series letters, such as N200VLD or N2016LSC, and the drive arrangement
- Serial number stamped on the plate
- Refrigerant in use
- Which items are needed from the valve, rotor or seal group
- Photograph of the compressor plate and of the part being requested
Tools for this equipment: the refrigerant number reader for the refrigerant named on the plant and compressor plates.
A shaft seal and a bearing set are not answered alike
Requests naming MYCOM compressor components arrive mixed, and the review differs by whether the shaft seal or oil separator element is the item named, rather than by the machine as a whole.
The shaft seal and the oil separator element are the items most likely to trigger a class or maker-specific check on a critical machine, and these go to an OEM-route review by default.
Gasket kits, bearing sets and other size-and-material consumables are ordinary supply questions, and a verified alternative can be reviewed on them where a buyer's approval requirements allow, with dimensional and material documentation checked at RFQ stage. Vessel Core is an independent spare parts supplier and marks the proposed route against each line on the list, so a mixed request naming both kinds of item is answered by line, not as one blanket route.
MYCOM compressor parts — questions from the engine room
Which MYCOM compressor programmes come up most often in spare-parts requests?
Open-type reciprocating machines and screw compressors are the two MYCOM programmes seen on board. Each is identified from its own model code on the compressor plate rather than from the plant name, and quoting that code, refrigerant prefix included, is what actually opens the enquiry.
How is an N-series code different from a screw frame designation?
The leading N is not a series: it is MYCOM's refrigerant prefix for ammonia, used on reciprocating and screw models alike, while F marks a fluorocarbon machine. On a reciprocating code the cylinder count follows the prefix and the series letters close it, as in N4WA. A screw model reads as a size figure followed by series letters, such as 200VLD, 2016LSC or 400LUD, and the screw parts follow that model designation on the compressor plate.
What parts are ordered on a MYCOM compressor request?
Valve plates and springs, piston and ring sets, shaft seal, gasket kits and bearing sets are the usual scope on the N series; rotor sets, bearings, shaft seal, the oil separator element and the slide valve items on the screw programme.
What should a MYCOM spare-parts RFQ contain?
A workable request lists the programme and its marking — the full N-series code with the trailing letter, or the screw frame designation with the drive arrangement — plus which items are needed from the valve, rotor or seal group. A photograph of the compressor plate and of the part being requested settles most of the remaining questions in one pass.
Can a MYCOM compressor part be identified without a part number?
Often yes. The decisive evidence is the programme and its marking — the full N-series code with the trailing letter, or the screw frame designation with the drive arrangement — together with a photograph of the removed item beside the nameplate. A part-book page or an earlier order line for the same unit is equally usable as reference.
Is Vessel Core connected to MYCOM?
No, and there is no agreement of any kind. Vessel Core holds no dealership, distribution, representation or partnership agreement with MYCOM, and quoting a component against one of its designations implies no approval by the maker and no claim of interchangeability.
Submit your RFQ now.
Send the programme and its marking (the full reciprocating code with its refrigerant prefix and series letters, or the screw model designation with the drive arrangement), plus a photograph of the compressor plate and the part needed. Vessel Core reviews the supply route and prepares a structured quotation.
