Pilot Unloader, 1/4" - 175psi

Air Compressor Pilot Valve, 145-175psi, 1/4" NPT P-25H

The P-25H pilot valve is a pressure control device commonly used in air compressor systems running between 145-175psi, particularly in reciprocating compressors with start/stop or constant run controls. It's designed to open or close a line (usually to an unloader or throttle control) based on system pressure.

The pre-set pressure is 145psi kick on and 175psi unload. 

P-25H Pilot Valve: 

• Type: Pneumatic pilot valve  
• Function: Senses air pressure and actuates an unloading or throttle mechanism at pre-set pressure levels.
• Usage: Common in systems where the compressor motor keeps running, but air delivery needs to be unloaded above a certain pressure.