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Sullair 250025-413 is the temperature control valve core (thermostatic element) inside the oil thermostatic valve. It is used on Sullair rotary screw air compressors. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Temperature Control Valve Core |
| Replaces | Sullair 250025-413 |
| Contents | Thermostatic element (valve core) with wax actuator |
| Function | Oil temperature control (cooler bypass) |
| Condition | New, aftermarket |
| Stat. HS-Code | 848180 |
| Sullair Part No.(SPM Part No.) |
|---|
| 250025-413(SPM-ACP-2767) |
High discharge temperature trips
A thermostatic valve that no longer opens keeps the oil away from the cooler, so the compressor runs hot and trips on discharge temperature. Check the cooler, fan and oil level first, then the valve.
Water in the oil
A valve that opens too early keeps the oil too cool, so moisture condenses in the separator tank and emulsifies the oil. Milky oil on a lightly loaded machine points to the thermostat.
Scheduled service
The thermal element wears out. Replace it at the major service interval in the compressor manual, or sooner on machines that run hot or work in humid sites.
Fitting tips
Stop the compressor, vent it and let it cool before opening the valve housing. Fit new O-rings, check the element sits square, then check oil temperature and look for leaks after start up.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 49.00 to 51.23 | 6 Oct 2026 |
| Air Compressor Services | USD 61.00 | 7 Oct 2026 |
| Spare Part Mart | USD 39.20 | Today |
Our price of USD 39.20 is 20% to 36% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Sullair 250025-413. It is not made by or affiliated with Sullair; the Sullair part number is used only to show what it replaces.
It fits machines that take Sullair 250025-413. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
Prices depend on your postcode.
In USD for the quantity selected. The exact cost is confirmed at checkout.
