Fisher 3610J or 3610JP pneumatic and 3620J or 3620JP electro-pneumatic positioners are used in combination with either single or double-acting rotary actuators to accurately position control valves used in throttling applications. The positioner mounts integrally to the actuator housing. These rugged positioners provide a
valve position proportional to a pneumatic or a DC
current input signal.
The 3610J or 3610JP pneumatic positioner in
combination with the Fisher 3622 electro-pneumatic
converter becomes the 3620J or 3620JP positioner,
respectively. This integral electro-pneumatic
converter, can be factory installed or installed in the field on existing positioners.
The electro-pneumatic converter receives the DC current input signal and provides a proportional pneumatic output signal through a nozzle/flapper arrangement.
The output signal from the converter becomes the input signal pressure to the pneumatic positioner, eliminating the need for a remote mounted transducer.
To support diagnostic testing of
valve/actuator/positioner packages, connectors,
piping, and other hardware can be installed between the 3610J or 3620J positioner and the actuator.