This minimum pressure check valve kit provides the replacement parts needed to service the minimum pressure valve on a rotary screw air compressor. The minimum pressure valve holds a set backpressure inside the airend so the unit builds proper pressure at startup and keeps oil circulating, while its integrated check function stops compressed air from flowing back into the pump when the compressor unloads or shuts down.
Rebuilding with a fresh kit restores a reliable seal and correct opening pressure, which helps protect the separator and the downstream system. Browse more check valves for related components, and see our guide on what an air compressor check valve does and how to know it is bad.
