Cooling system
Marine cooling water pumps, heat exchangers and thermostats
Overheating is usually a pump or a fouled cooler, not a mystery. We supply cylinder cooling water pumps, sea water pumps, plate and shell-and-tube heat exchangers, thermostats and seal kits.
- Single unit or complete kit
- OEM and verified alternatives
- Certificate with shipment
- Quotation in one business day
Components
What we supply
Cooling system parts are cheap relative to the downtime they cause, which makes them a frequent urgent enquiry. Send the pump type or the cooler drawing and we will confirm the impeller, shaft, seal and plate pack against it.
| Component | Function | Supply notes |
|---|---|---|
| Cylinder cooling water pump | Circulates fresh water through the engine | Complete pump or rotating assembly |
| Sea water pump | Supplies cooling water from overboard | Impeller, shaft, seal kit |
| Plate heat exchanger | Transfers heat between circuits | Plate pack and gasket set |
| Shell & tube cooler | Cools lube oil or fresh water | Tube bundle replacement |
| Thermostat / temperature regulator | Controls coolant temperature | Wax element, set to engine spec |
| Mechanical seal | Prevents leakage at the pump shaft | Single or double, matched to shaft size |
| Impeller | Moves the water volume | Bronze, rubber or composite |
Illustrative photo. Photo: rawpixel, CC0.
Specification
Typical range and what ships with the part
To quote accurately
What we need from you
- 1. Engine make and type
For example MAN B&W 6S50MC-C, or Wärtsilä 6L32. - 2. Part number
From the manual, the invoice, or stamped on the old part. - 3. Quantity and destination
One unit or a set, and the port or city for delivery. - 4. A photo, if the number is gone
The worn part, the nameplate or a drawing with dimensions.
Questions
Before you enquire
Titanium plates for sea water coolers?
Yes. Where the cooler sees sea water directly, titanium plates outlast 316L by a wide margin. The price difference is small against the cost of a second failure.
Can you supply a seal kit without the pump?
Yes. Give us the pump make, model and shaft diameter, or the seal part number. Seals are the most common cause of a pump drip and the cheapest part to replace.
Do you recondition or only supply new?
We supply new parts. Where a pump housing is still serviceable, we quote the rotating assembly and seal kit rather than the complete pump.
Request a quotation
Tell us what you need
One part number is enough to start. Drawings, photos and nameplate details all help us confirm the match.
Tell us what you need
We reply by email, usually within one business day.