The working principle and characteristics of pneumatic valve is what kind of pneumatic valve, also known as pneumatic directional valve. 
It is a set of control components composed of cylinder and electromagnetic reversing valve. 
Under the action of air pressure, the piston or diaphragm reversing mechanism is driven by an electromagnetic coil to work. 
When the compressed air enters the actuator, the piston or diaphragm reversing mechanism connects the air path; when the compressed air is discharged from the actuator, the solenoid reversing valve cuts off the air path and maintains a certain pressure. 
In this way, the control of valve switch can be realized. 
The use of pneumatic regulating ball gate valve: 
1. Used to cut off or turn on the media stream. 
2. Adjust the flow. 
3. Change the flow direction of the media. 
4. Prevent countercurrent. 
5. Eliminate impurities in the pipeline. 
6. Emit gas. 
7. Low noise. 
8. It can be made into explosion-proof type. 
9. With manual device. 
10. Easy to install. 
Convenient maintenance is widely used in the automatic control system of chemical industry, petroleum, metallurgy, power station and other industries as regulation and cost-saving.