The 5/2 RSe Series valve can be utilized for Safe Return Dual Pressure Applications to control pressure in order to extend a cylinder with the supply pressure at port 3 and retract with the supply pressure at port 5. The fail-to-safe condition is also to retract. The safety function of the 5/2 RSe Series safe return dual pressure valve is to return the cylinder/actuator to its home “safe” position whenever a fault occurs within the valve by supplying pressure from port 5 to port 4 with port 2 being exhausted out of port 1 and the pressure supplied to port 3 is blocked. Using the RSe valve in a Safe Return Dual Pressure Application can reduce overall air consumption of a machine, and helps protect the environment. However, the RSe Series does this with the same level of control, up to Category 4, PL e, expected of the machine’s/system’s safety circuit.

The RSe Series valves are designed for external monitoring for safe, redundant operation of the valves. Such a monitoring system must be capable of inhibiting the operation of the valve. The RSe Series valves are constructed of redundant 5/2 spool type valves, and have an overall function of a single solenoid pilot-operated, spring return valve. Each single valve in the RSe Series is equipped with a PNP proximity sensor. Monitoring both of these sensors on each actuation and de-actuation of the RSe Series valve provides a diagnostic coverage of 99%. Monitoring of these sensors is to be done by an external monitoring system.