Chicago Pneumatic 2901353100 OEM Thermal Valve Replacement Kit for QRS20-30, CPBG20-35

Chicago Pneumatic 2901353100 OEM Thermal Valve Replacement Kit for QRS20-30, CPBG20-35

2901353100 is a minimum pressure check valve and thermal valve replacement kit. 2901353100 is an OEM part. Sometimes this is displayed in a parts manual as 2901-3531-00 or 2901 3531 00. This kit contains the parts needed to rebuild both the thermal valve and minimum pressure check valve (MPCV) assembly.

2901353100 is used on a wide arry of Chicago Pneumatic, Quincy, and Atlas Copco air compressors between 20hp-35hp. Typically this will only fit models made after 2019.

Please note that there were several different MPCV's and Thermal Valves used on similar models of air compressors. If you are not 100% sure this kit is correct for your compressor, please give us a call and we can confirm.

A compressor thermal valve opens when the oil gets hot to let coolant/oil flow through the cooler before the oil is sent back into the sump tank. This prevents the compressor from overheating. If your compressor is consistently shutting down on high temp and your oil is full, more than likely this valve needs to be replaced. It is recommended to replace the thermal valve every two years or 8,000 hours of operation.

The minimum pressure check valve keeps air pressure inside of the sump during the initial startup of the compressor. This helps the oil circulate throughout the compressor on start-up. Once the pressure inside of the oil sump reaches approximately 60psi, the valve will open and let compressed air flow downstream. A properly functioning MPCV will prevent oil carryover into your piping system. This will also prevent high pressure air from your receiver and air piping from re-entering internal compressor components. If air is leaking from the inlet after the compressor has been shut off for a period of time, there is a good chance that this valve failed and is letting high pressure air flow back inside of the compressor.