Rolair 131CVM Pilot Check Valve Air Compressor

Rolair part number 131CVM is a replacement check valve and pilot/unloader assembly for select gas-powered Rolair and Mi-T-M compressors. The unit combines a one-way check valve that seals tank pressure after the compressor reaches its cut-out setting with a piloted valve that unloads the pump at cycle end, enabling automatic idle control and reducing wear. Listed in Rolair’s parts catalog as a Valve, Check/Pilot Combo, 131CVM is cross-listed for Mi-T-M model 22-0230, indicating broad replacement use across brands in dual-control governor configurations. This dual-function valve plays a key role in the air governor system, maintaining pressure while allowing the engine to idle between cycles.