Pressure Relief Pilot Valve

The 3PBL-R is a pilot valve, primarily for use as a pilot controlling UL listed and FM approved BERMAD pressure relief/sustaining valves.
In a typical configuration, when the force of pressure under the diaphragm in the 3PBL-R increases to a value above the set spring force, set using the adjusting screw, the pilot will open, releasing pressure from the control loop and opening the main valve.