TYPE PR
Type PR is triple pole pressure switch without unloading valve with adjustable differential.

TYPE PRV
Type PRV is pressure switch provided with an unloader valve which relieves the pressure over the compressor piston when the electric motor stops. Hence when the compressor restarts, there is no gauge pressure on the compressor piston and as a result the electric motor life & compressor life increase.

TYPE PR-X
Type PRV-X is triple pole pressure switches without unloading valve but with on/off knob to stop the compressor at place.

Type PRV-X
Type PRV-X is come with unloader valve system as per PRV type with on/off knob to stop the compressor at the place