Pneumatic Control Valve

Pneumatic Control valve, can control the output discharge by using of a compressed air force and a diaphragm actuator.  This valve can be normally open or closed and this feature is occurred by changing of springs positions inside actuator. The attached shaft is gradually moved, by changing the compressed air volume, and it will cause to change also the distance between seat and plug. In this way, the flow rate of fluid can be controlled. Air pressure inside the actuator can be supplied from regulators and I/P positioners through 4…20 mA.