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The sealing performance and excellent adjustment performance of the ball valve body
- Dec 12, 2017 -

Ball valve body is evolved from the stopcock. As a sphere, the opening and closing of the product is achieved by rotating the sphere about the axis of the stem by 90 degrees. The difference is that the cock body is a sphere with circular through holes or channels passing through its axis.

The ratio of the spherical surface of the ball valve body to the channel port should be such that when the ball is rotated 90 degrees, all the spherical surfaces should be present at the inlet and outlet so as to cut off the flow. Ball valves are mainly used in pipelines to cut off, distribute and change the direction of medium flow. Ball valves designed as V-shaped openings also provide good flow regulation.

Ball valve body is not only simple in structure and good in sealing performance, has a certain nominal pass range, but also is small in volume, light in weight, less in material consumption, small in installation size,  small in driving torque, easy to operate, easy to realize rapid opening and closing. It is one of the fastest-growing valve varieties in recent decades.

Ball valve body is widely used, the use varieties and quantity continues to expand. And it is developing to high temperature, high pressure, large mouth, high sealing, long life, excellent adjustment performance and a valve multifunctional direction. Its reliability and other performance indicators have reached a high level, and has partially replaced the sluice valve, cut-off valve, regulating valve.
Ball valve body only needs to rotate 90 degrees and a small rotative moment, then it can be closed tightly. Completely equal valve body cavity for the medium provides a small resistance and through runner. It is generally believed that ball valves are most suitable for direct open and close use, but recent developments have designed ball valves to provide throttling and flow controlling.

The main characteristics of ball valve body is its compact structure, easy operation and maintenance, suitable for water, solvents, acids and natural gas and other general working media. And it is also suitable for harsh working conditions such as oxygen, hydrogen peroxide, methane, ethylene and so on. The ball valve body may be integral or combined.