Valve with pneumatic diaphragm actuator and "clever" positioner which will also feed back again towards the controller the particular valve posture The Viking Pneumatic Actuator is really a spring loaded to open, rolling diaphragm, piston operated valve. It truly is applied wherever a separation is necessary in between the detection http://pneumatic-actuator53692.shotblogs.com/getting-my-pneumatic-actuator-to-work-26556019