Ball valve is a common valve whose the opening and closing member (ball) is driven by the valve stem and rotates around the axis of the valve. It has been widely used in petroleum, chemical, power generation, papermaking, atomic energy, aviation, rocket and other departments, as well as people's daily life.

Ball valve function

1.   The ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. It only needs to be rotated 90 degrees and the torque can be closed tightly.

2. For fluid regulation and control, the hard-sealed V-valve has an approximately equal percentage of inherent flow characteristics and a tunable ratio of up to 300:1 to provide precise regulation over a wide range of variations. The multi-way ball valve not only can flexibly control the switching of the merge, diversion and flow directions of the medium, but also can close any channel and connect the other two channels.

Ball valve structural characteristics

1.   The thrust bearing reduces the friction torque of the valve stem, which makes the valve stem smooth and flexible for long-term operation

2.   Anti-static function: a spring is arranged between the ball, the valve stem and the valve body to discharge the static electricity generated during the switching process.

3.   Since the material such as teflon has good self-lubricating property and the friction loss with the sphere is small, the service life of the ball valve is long.

4.   The fluid resistance is small: ball valve is the smallest of the fluid resistance of all valve types, even the reduced bore ball valve, its fluid resistance is quite small.

5.   Stem seal is reliable: Since the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easy to break, and the sealing capacity increases with the increase of the medium pressure.

6.   The sealing performance of the valve seat is good: the sealing ring made of elastic material such as PTFE is easy to seal, and the valve sealing ability of the pneumatic ball valve increases with the increase of the medium pressure.

7.   Simple structure, small size and light weight

8.   Compactness and reliability. It has two sealing faces, and the sealing surface material of the ball valve is widely used in various plastics, and has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.

9.   Easy to operate, open and close quickly, from full open to full off as long as rotated 90 °, easy to control over long distances.

10.  The maintenance is convenient. the ball valve is simple in structure, the sealing ring is generally active, and it is convenient to disassemble and replace.

11. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium. When the medium passes, it will not cause erosion of the sealing surface of the valve.

12. a wide range of applications, from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied.

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