New 4 Port 3 Phase Air Compressor Pressure Switch Control Valve 140-175 PSI
Blow Guns & Tire Inflators. Air Compressor Oil. Compressor Rebuilt Kits. The unloader equipped on this switch is used to unload the air pressure off the head of the compressor when the compressor shuts off, this way when it starts there is no pressure on the piston and the compressor is able to start load free.