Pneumatic ball valve is a common fluid control device, which is usually used for the handling of fluid medium. It has a simple structure, good sealing performance, small flow resistance and other characteristics, is widely used in petrochemical, electric power, water treatment, iron and steel metallurgy and other fields. In this paper, we will introduce the basic structure of pneumatic ball valves, working principle, advantages, scope of application and other aspects in detail.
First, the basic structure of pneumatic ball valve
Pneumatic ball valve consists of two parts: the actuator and the ball valve body. Ball valve body mainly consists of valve body, valve cover, spool, stem, ball, gasket and other parts. The actuator includes gas source interface, cylinder, air pressure regulator, signal switch and other components, through the pneumatic control system signal to realize the control of the ball valve body.
Second, the working principle of pneumatic ball valve
Pneumatic ball valve is through the air source will be transmitted to the cylinder, push the piston driven spool and the valve body between the sphere rotation, so as to realize the control of the medium on and off. Pneumatic ball valve opening and closing action speed is determined by the pressure of the gas source, the diameter of the gas pipe, the size of the cylinder and the structure of the ball valve body and other factors.
Third, the advantages of pneumatic ball valve
1, good sealing performance. Pneumatic ball valves use elastic materials as seals, simple structure, tight, can effectively prevent the media leakage.
2, small fluid resistance. The ball is rotated to control the passage of the medium, compared with other types of fluid valves, pneumatic ball valve flow resistance is small, small pressure drop.
3, long service life. The structure of the ball valve is simple, reliable operation, close fit, flexible switching, long service life.
4, good self-cleaning performance. The ball in the rotation process will be convective cleaning inside the valve, play a self-cleaning role, reduce the chances of valve clogging.
5, easy to operate. Pneumatic ball valves can be connected to the remote control system to realize automatic switching, can also be manually controlled, easy to operate.
Fourth, the application of pneumatic ball valves
Pneumatic ball valves are widely used in petroleum, chemical, metallurgy, electric power, water, food, medicine and other industries, suitable for high temperature, high pressure, strong corrosive media and so on.
