Ball valve is a new type of valve in the 1950s. In a short period of more than 30 years, it is one of the valve varieties with rapid development in recent ten years. On the pipeline, it is mainly used to cut off, distribute and change the medium flow direction. The ball valve designed as V-shaped opening also has good flow regulation function. The ball valve can be closed tightly only by rotating 90 degrees and a small rotating torque. The completely equal inner cavity of the valve body provides a very small resistance and straight flow channel for the medium.

The ball valve not only has simple structure and good sealing performance, but also has small volume, light weight, less material consumption, small installation size, small driving torque, simple operation, easy to realize rapid opening and closing, easy operation and maintenance. It is suitable for general working media such as water, solvent, acid and natural gas, but also for media with poor working conditions, Such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be integral or combined.

Features of ball valve:

1. The ball valve has small fluid resistance and low flow resistance (actually zero)

2. The opening and closing of ball valve is fast and convenient.

3. The ball valve has good sealing performance.

4. Long service life of ball valve.

5. The high reliability of ball valve is mainly due to:

① A pair of sealing pairs of ball and valve seat will not scratch, sharp wear and other faults, and will not get stuck during operation (when there is no lubricant), so it can be reliably used in corrosive media and low boiling point liquids.

② The built-in valve stem structure eliminates the potential accident that the valve stem may fly out due to the loosening of the packing gland under the action of fluid pressure.

③ The ball valve with anti-static and fire-resistant structure is suitable for pipelines conveying oil, natural gas and gas.

6. The channel in the valve body is flat and smooth, which is more suitable for conveying viscous fluid, slurry and solid particles.

7. Because it will not get stuck during operation (when there is no lubricant), it can be reliably used in corrosive media and low boiling point liquids.

8. The spherical closing part can be positioned automatically in position and can withstand the high pressure difference during closing.

9. It can realize complete two-way sealing in a large pressure and temperature range.

10. When fully open and fully closed, the sealing surface of the ball and valve seat is isolated from the medium, so the medium passing through the valve at high speed will not cause erosion of the sealing surface.

11. With compact structure and light weight, it can be considered as a reasonable valve structure for low-temperature medium system.