As long as one of the two solenoids are energised the main control valve will be in its operating position, which in turn keeps the actuator/process valve in its operating position. Both coils must be de-energized in order to return the actuator/process valve to its non-operating position.
The Redundant solenoid system can be fitted to any of Pneumatrol’s standard 3/2 or 5/2 control valves which utilise the CNOMO solenoid interface.
Products available with this function are: