Marine Air Compressor Spare Parts
Valve sets, pistons, rings, bearings, unloaders, coolers and complete overhaul kits for marine starting air and working air compressors.
A starting air compressor is a simple machine that gets neglected until the day the main engine will not start. Valves are the consumable — suction and delivery plates, springs and seats fail long before anything else — and the second-stage valve usually goes first because it sees the highest temperature. Most compressor trouble traces back to valves left in service too long, a fouled intercooler or a leaking unloader.
We supply valve sets, piston and ring sets, bearings, gaskets, unloader assemblies, safety valves and complete overhaul kits for the makes that actually sail: Sperre, Tanabe, JP Sauer, Hamworthy, Matsubara and the rest. Kits are supplied as a running-hour set so you overhaul once rather than opening the machine twice.
What We Supply
- First and second stage suction and delivery valve sets, plates and springs
- Pistons, piston rings and gudgeon pins
- Main, big end and small end bearings
- Complete gasket and O-ring overhaul kits by running-hour interval
- Unloader assemblies, solenoid valves and drain valves
- Intercooler and aftercooler elements, tube stacks and zinc anodes
- Safety valves, pressure switches and non-return valves
- Crankshafts, connecting rods and cylinder liners for compressor blocks
Air Compressor Symptoms and Their Usual Cause
- Long charging time or failure to reach working pressure — valve leakage, usually second stage
- High second-stage discharge temperature — leaking first-stage delivery valve or fouled intercooler
- Intermediate pressure above normal — second-stage suction valve leaking
- Intermediate pressure below normal — first-stage valve leaking or filter blocked
- Compressor not unloading on start — faulty unloader or solenoid
- Oil carryover into the air receivers — worn rings or overfilled crankcase
- Knocking — worn big end bearing or excessive small end clearance
- Water in the receiver drains — intercooler tube leak or drain trap not operating
Engine & Equipment Makes We Cover
Marine Air Compressor Spare Parts supplied for the makes below, as genuine OEM and as class-approved equivalents — both quoted so you can decide against your survey date rather than guess.
What to Send Us for a Quote
Send the compressor make, the model from the nameplate and the serial number if you have it — compressor models change internally across serial ranges more often than engines do. Tell us the running hours since the last overhaul and we will quote the correct interval kit rather than a loose parts list.
Related Parts & Categories
Marine Air Compressor Spare Parts — Common Questions
What superintendents and purchasing teams ask us most about marine air compressor spares.
Which marine air compressor brands do you supply parts for?
Sperre, Tanabe, JP Sauer & Sohn, Hamworthy, Matsubara, Bahnson, Atlas Copco and Hatlapa for starting and working air, plus Bock, Bitzer and Sabroe on the refrigeration side.
Do you supply complete air compressor overhaul kits?
Yes, made up to the maker's running-hour intervals — typically valves, rings, gaskets, O-rings and bearings as one set. Buying the interval kit is cheaper than opening the machine twice because one item was missing.
Why is my compressor's second-stage discharge temperature high?
The two usual causes are a leaking first-stage delivery valve passing hot air forward, or a fouled intercooler failing to remove the heat of first-stage compression. Check the intermediate pressure at the same time — it tells you which of the two you are dealing with.
How often should air compressor valves be replaced?
To the maker's running-hour interval, and sooner if performance drops. Valves are the primary consumable in a starting air compressor and most compressor problems come back to valves left in service past their interval.
Do you supply intercooler and aftercooler elements?
Yes, along with tube stacks, end covers, gaskets and zinc anodes. We can also supply the safety valves and pressure switches that go with them.
What information do you need to quote compressor spares?
The compressor make, the model from the nameplate and the serial number. Compressor internals change across serial ranges more often than engine parts do, so the serial number saves a round of clarification.
Supplied From Our Global Hubs
Marine Air Compressor Spare Parts spare parts sourced and delivered from our supply hubs in the UAE, South Korea and China.