The electro-pneumatic control valve is used primarily as the actuator in a level or flow rate control loop.
The control valve is installed on a panel which can be quickly and easily attached to the frame of the RT 450 base module. An electrical signal input (identical to the controller output) is pre-configured and routed to the base module terminal array which is specific to the particular application.
The control valve is fitted with an electro-pneumatic positioner which requires a supply of compressed air. The valve rod is driven by a pneumatically operated membrane. The electro-pneumatic control valve is set to the safe “closed” position when no auxiliary power is applied.
