Pneumatic ball valve is composed of ball valve pneumatic actuators, pneumatic actuators are divided into double-acting pneumatic actuators and single-acting pneumatic actuators, controlled by electromagnetic valve, ball valve switch action. Which can realize intelligent control, pneumatic ball valve opened or closed fast line, can effectively control and management of network. Ball valve in the line is mainly used for cutting, distribution, and change the flow direction of medium, it just has to rotate 90 degrees of operating and small rotational torque can be closed tightly. Ball valve is suitable to do the most switch, cut-off valve, ball valve but recent development have designed to make it with throttling and control flow, such as V type ball valve. The application of the pneumatic ball valve, ball valve itself, compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, easy operation and maintenance, applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, widely used in various fields. Ball valve body can be a whole, also can be combined. The characteristics of the pneumatic ball valves, pneumatic ball valve is mainly used to truncate or on line in the medium, can also be used for flow regulation and control, compared with other type valve, pneumatic ball valve has a quarter-turn output torque, open fast, stable and reliable, applicable widely, such as the following several advantages. 1, fluid resistance small, pneumatic ball valves are classified all valves fluid resistance in the smallest one, even the pneumatic ball valve, reducing the fluid resistance is small. 2, thrust bearings reduce stem friction torque, can make the valve stem long smooth and flexible operation. 3, seat sealing performance is good, use the sealing ring made of elastic material, such as teflon structure is easy to be sealed, and pneumatic ball valve of the valve sealing ability increases as the medium pressure increases. 4, the valve stem seal is reliable, due to the valve stem will only be used as the rotation without lifting movement, the valve stem packing seal is not easy to damage, and sealing ability increases as the medium pressure increases. 5, such as ptfe material has good self-lubrication, with ball friction loss is small, so the pneumatic ball valve of long service life. 6, bottoms type valve stem and valve stem head convex order to prevent the Industrial Valves stem, stem seal damage caused by such as fire, convex order between the body and also can form metal contact, to ensure that the valve stem seal. 7, anti-static function: in a sphere, the valve stem and valve body between spring, will be generated switching process of electrostatic export. In this paper, the keyword search: more technical articles valve product supply information
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