The GP series control valve is an electronic pressure regulator designed to precisely control the pressure of gaseous media proportional to an electronic signal in pressure ranges up to 1000 PSI.
The GP1 operates using two normally closed solenoid valves, a pressure sensor, and a control circuit. One valve is actuated to allow unregulated supply media into the system. The second valve is actuated to allow working media to vent to atmosphere. An electronic circuit compares the pressure sensor feedback to the user supplied electronic command signal and actuates the appropriate valve until the two signals match.
The GP2 is similar to the GP1 but uses a double loop control scheme. In addition to the internal pressure transducer, the GP2 also receives a 0-10Vdc feedback signal from an external sensing device. The external signal functions as the primary feedback and is compared to the command signal. A difference between the two comparisons causes one of the two solenoid valves to open allowing flow in or out of the system.