This is a 2-way direct acting pilot valve, actuated by a pressure responsive diaphragm, which seeks to reach equilibrium between hydraulic and set spring forces. When used in a pressure relief/sustaining circuit, the pilot modulates open as upstream pressure rises above set point.
- Differential pressure sensing
- Pressure Sustaining valves sizes 11/2-4” (Standard model PC-30-P).
- Differential pressure sustaining Valves sizes 11/2-4” (Modified to differential sensing PC-30-P-D)