Pneumatic pneumatic ball valves are mainly used in pipelines to cut off quickly, distribute and change the flow direction of media. Pneumatic pneumatic ball valve is a new type of valve widely used in recent years. It has the following advantages:
1. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections with the same length.
2. Simple structure, small volume and light weight.
3. The classification and characteristics of pneumatic ball valves are tight and reliable. At present, plastic is widely used as the sealing surface material of pneumatic ball valves with good sealing performance, and it has also been widely used in vacuum systems.
4. It is easy to operate and can be opened and closed quickly. It only needs to rotate 90 ° from full opening to full closing to facilitate remote control.
5. It is easy to maintain, the pneumatic pneumatic ball valve is simple in structure, the sealing ring is generally movable, and it is easy to remove and replace.
6. When the valve is fully opened or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the valve sealing surface.
7. It has a wide range of applications, ranging from a few millimeters to several meters in diameter, from high vacuum to high pressure.
8. Because the power source of pneumatic pneumatic ball valve is gas, it is generally 0.2-0.8MPa, which is relatively safe. If the pneumatic pneumatic ball valve leaks, compared with the hydraulic and electric valves, the gas can be discharged directly, which does not pollute the environment and has high safety.
9. Compared with manual and turbine rotating pneumatic ball valves, pneumatic pneumatic ball valves can be configured with large caliber. (Manual and turbine rotating pneumatic ball valves are generally below DN300 caliber, and pneumatic pneumatic ball valves can currently reach DN1200 caliber.) Pneumatic pneumatic ball valves have been widely used in petroleum, chemical, power generation, paper making, atomic energy, aviation, rocket and other departments, And people's daily life.

The electro pneumatic valve positioner, powered by electric signal and compressed air, receives 0-10mA? Input from the control system? DC or 4-20mA? The DC current signal is converted from compressed air to air source pressure signal input and output by the regulator to change the rotation angle of the valve plate (0-90o any angle), which has better parameters such as flow regulation and control.