Patent ID: 7631656

Claim:
A pressure control valve manifold, comprising: a manifold housing; a manifold inlet port in the manifold housing for receiving pressurized air; a plurality of pressure control valves in the manifold housing, each of the pressure control valves comprising: a pressure control valve inlet port receiving the pressurized air from the manifold inlet port; a pressure control valve housing; a piston within the pressure control valve housing; a spring within the pressure control valve housing for biasing the piston to seat in a first position for limiting fluid communication between the pressure control valve inlet port and a pressure control valve outlet port of the pressure control valve housing; and an insert at least partially surrounding a portion of the piston and cooperating with the spring for setting a pressure differential between an inlet side of the piston and an outlet side of the piston that unseats the piston from the first position for establishing fluid communication between the pressure control valve inlet port and the pressure control valve outlet port, the insert being secured at a predetermined position within the housing for non-adjustably setting the pressure differential, the insert including an insert passage to atmosphere, and a shoulder of the piston abutting the insert when a pressure at the inlet side of the piston is above a predetermined level and a plurality of manifold outlet ports for delivering the pressurized air from the respective pressure control valve outlet ports.