The Cla-Val Electronic Actuated Pressure Reducing Control Valve combines the precise control of field proven Cla-Val hydraulic pilots and the convenience and versatility of remote set point control. The Cla-Val PRV automatically reduces a higher inlet pressure to a steady lower downstream pressure regardless of changing flow rate and/or varying inlet pressure. This valve is an accurate, pilot-operated regulator capable of holding downstream pressure to a predetermined limit. The pilot control, consisting of a hydraulic pilot and integral controller, accepts a set point and compares it with a pressure or internal position signal and makes incremental adjustments to modulate the valve to set point.
Adjustable solid-state limit switches eliminate over ranging. In the event of a power or transmitter failure, the CRD-30 hydraulic pilot remains in valve control virtually assuring system stability under changing conditions. If check feature is added, and pressure reversal occurs, the valve closes to prevent return flow.

Applications

• Designed to be used with supervisory control systems having an isolated remote analog set point output and a process variable downstream pressure input.
• An effective solution for lowering costs associated with “confined space” requirements by eliminating need for entry into valve structure for set point adjustment and system information.
• Additional Pilot Controls, hydraulic and/or electronic, can be easily added to perform multiple control functions to fit exact system requirements.