How does a pneumatic valve work?

What is the working principle of pneumatic valve?

Definition: Pneumatic valve is a valve driven by compressed air.
1. Main types of pneumatic valves:
1) Pneumatic V-type regulating ball valve
2) Pneumatic O-type cut-off ball valve
3) Torque cylinder ball valve
4) Solenoid diaphragm valve
>5) Pneumatic linear diaphragm valve
6) Electric valve

2. Pneumatic V-shaped regulating valve:
Use and characteristics
A. Purpose It is a right-angle rotary structure, which is used in conjunction with the valve positioner to achieve proportional adjustment;the V-shaped valve core is most suitable for It is suitable for various adjustment occasions, with large rated flow coefficient, large adjustable ratio, good sealing effect, zero sensitivity in adjustment performance, small size, and can be installed vertically or horizontally. Suitable for controlling gas, steam, liquid and other media.

B. Features: It is a right-angle rotary structure, consisting of a V-shaped valve body, a pneumatic actuator, a positioner and other accessories;it has an inherent flow characteristic of approximately equal ratio;it adopts a double-bearing structure and has a small starting torque. , has excellent sensitivity and sensing speed;super shearing ability.

C. The pneumatic piston actuator uses compressed air as the power source, and drives the crank arm to rotate 90 degrees through the movement of the piston to automatically open and close the valve. Its components are: adjusting bolt, actuator box, crank arm, cylinder block, cylinder shaft, piston, connecting rod, and universal shaft.

D. Working principle of pneumatic control valve: Pneumatic control valve is composed of an actuator and an adjustment mechanism. The actuator is the thrust component of the regulating valve. It generates corresponding thrust according to the control signal pressure and promotes the action of the regulating mechanism. The valve body is the regulating component of the pneumatic regulating valve. It is in direct contact with the regulating medium and regulates the flow of the fluid.