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Pneumatic ball valve structure is compact, 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, and is suitable for water, solvents, acids and generally working medium, such as natural gas is mainly used for cutting or on line in the medium, can also be used to adjust and control of the fluid.
The pneumatic ball valve has the angular stroke output torque compared with the other valve type, which is fast, stable and reliable, widely used, and some of the following advantages.
Antistatic function: the spring can be set between the ball, stem and valve body to produce static electricity generated by the switch process
Long service life: due to the good self-lubrication of polytetrafluoroethylene, the frictional loss of the ball is small, so the pneumatic ball valve.
Fluid resistance is small: the pneumatic ball valve is one of the smallest fluid resistance in all valve classification, even the reducing pneumatic ball valve and its fluid resistance is quite small.
The stem seal is reliable: it has two sealing covers, and the sealing material of the ball valve is widely used in various kinds of plastic, sealing well, which can be fully sealed. It is also widely used in vacuum systems. The stem packing is not easily damaged because the stem is operated as if it is transported without lifting, and the sealing capacity increases with the pressure of the medium.
Seat sealing performance: the sealing ring made of polytetrafluoroethylene and other elastic materials is easy to seal, and the valve sealing ability of the pneumatic ball valve increases as the pressure of the medium increases.
The thrust bearing reduces the friction torque of the stem and allows the stem to operate smoothly and flexibly.
Simple structure, small volume and light weight.
Easy to operate, open and close quickly: from open to close just rotate 90 °, is advantageous for the remote control.
Easy maintenance: the ball valve structure is simple, the sealing ring is generally the activity, remove and replace are more convenient.
The sealing surface of the ball and seat is separated from the medium during full or closed, without causing the valve sealing surface to be eroded by the medium through.
Wide range: sizes ranging from a few millimeters to a few meters, ranging from high vacuum to high pressure. Because the ball valve has a wipe in the opening and closing process, it can be used in the medium with suspended solid particles.
High machining accuracy: it is expensive and not suitable for use in high temperature. If there is impurities in the pipeline, it is easy to get clogged with impurities, so that the valve cannot be opened.