Pilot Piston Style Pilot Operated Check Valves CSP103A50V-A8T

P.O. check valve assemblies allow free flow to the actuator while blocking flow in the return direction. A pilot operated feature allows return flow to pass through the valve only when pilot pressure exceeds the required setting to shift the poppet open.

Parker’s single pilot operated (P.O.) check valves are available in pressures up to 5000 PSI and flow rates as high as 50 gallons per minute. The CSP(H) series uses a standard pilot piston and a standard Parker check valve in an assembled body.

At rest the check valve remains seated, blocking flow from exiting the actuator port and locking the circuit in place. When pressure and flow are opened to the valve inlet, the check valve will allow free flow to the actuator. The valve assembly also utilizes an internal pilot piston with a 3:1 or 4:1 ratio. When sufficient pressure is applied to the pilot port, the piston will respond quickly and will shift against the return check. This action mechanically pilots the valve open, unlocking the circuit, to allow return flow to pass through the valve from the actuator back to tank. When system pressure is shut off to the valve, the valve will return to the holding condition restricting actuator movement and locking the system in place.

These valves are ideal for load holding applications, where metering conditions are not required.

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