Pneumatic diaphragm actuator control valve manufacturer, factory and supplier. Pneumatic diaphragm actuator control valve is mostly common control valve in the industry control system. Pneumatic actuators are commonly used to actuate control valve and are available in two main forms: Pneumatic piston actuator and pneumatic diaphragm actuator. Diaphragm actuator of the control valve can be single acting or double acting for automatic control.
Diaphragm actuator has compressed air applied to a flexible membrane called the diaphragm. The rolling diaphragm where the effective diaphragm area is virtually constant throughout the actuator stroke.These types of actuators are single acting, in that air is only supplied to one side of the diaphragm, and they can be either direct acting (spring-to-retract) or reverse acting (spring-to-extend).
The operation of a pneumatic diaphragm actuator control valve involves positioning its movable part (the plug, ball or vane) relative to the stationary seat of the valve. The purpose of the pneumatic acuator is to accurately locate the valve plug in a position dictated by the control signal.The actuator accepts a signal from the control system and, in response, moves the valve to a fully-open or fully-closed position, or a more open or a more closed position (depending on whether ‘on/off’ or ‘continuous’ control action is used).
Pneumatic diaphragm actuator control valve specification:
Performance parameter
Diameter：DN10~DN600
Pressure：PN16~PN420, Class 150-Class 2500
Flow characteristics：
1、Quick opening，Linear or EQ%
Sturcture: casting or forging globe type
Body Material：
WCB, CF8, CF8M, A105,12Cr1MoV,F22, F91, etc
Feature:
Excellent Packing System
Inside: using high temperature resistant
Stellite cobalt-based hard alloy disc
Up and down guiding ring on the disc
With best CV value
Sealing surface with special overlaying welding
Replaceble trim structure
