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Analysis of high pressure ball valve

Views: 165     Author: Site Editor     Publish Time: 2021-08-21      Origin: Site

The high-pressure ball valve came out in the 1950s. With the rapid development of science and technology, the continuous improvement of production technology and product structure, in just 40 years, it has rapidly developed into a major valve category. Ball valves are widely used in petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries, and occupy a pivotal position in the national economy.



70-1 gate valves

The working principle and characteristics of high pressure ball valve

The high-pressure ball valve has the action of rotating 90 degrees, and the cock body is a sphere with a circular through hole or channel passing through its axis. The electric ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to rotate 90 degrees and a small torque can be closed tightly. Ball valves are most suitable for switching and shut-off valves, but recent developments have designed ball valves to throttle and control flow, such as V-shaped ball valves.


The main features of the high-pressure ball valve are its compact structure, reliable sealing, simple structure, and convenient maintenance. The sealing surface and the spherical surface are often in a closed state, which is not easy to be eroded by the medium. It is easy to operate and maintain. It is suitable for water, solvent, acid and natural gas. The working medium is also suitable for the medium with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene, etc., which are widely used in various industries. The valve body of the ball valve can be integral or combined.



70-2 pneumatic actuated valves

Advantages of high pressure ball valve

1. The fluid resistance is small, and the full-bore ball valve basically has no flow resistance.


2. Simple structure, small size and light weight.


3. Close and reliable. It has two sealing surfaces, and various plastics are widely used as the sealing surface materials of the ball valve, which has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.


4. It is easy to operate and open and close quickly. It only needs to rotate 90° from fully open to fully closed, which is convenient for remote control.


5. The maintenance is convenient, the structure of the electric actuated ball valve is simple, the sealing ring is generally movable, and it is convenient to disassemble and replace.


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


7. It has a wide range of applications, with a diameter ranging from a few millimeters to a few meters, and can be applied from high vacuum to high pressure.


8. Since the ball valve has wiping properties during opening and closing, it can be used in media with suspended solid particles.



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