Campbell Hausfeld CW000100AV Air Compressor Unloader Valve

The Campbell Hausfeld CW000100AV Air Compressor Unloader Valve releases compressed air from the pump discharge line when the compressor stops, reducing restart pressure on the motor; it opens in the pressure switch cycle to vent trapped air and then closes when the compressor starts a new compression cycle. Normally, this part is mounted inside or beside the pressure switch assembly on those air compressors for which it supplies help in normal pressure regulation and restart operation. Better function will help promote smoother motor starts, reduce strain during cycling, and contribute to consistent compressor performance.