Ball valve structure principle

Ball valve structure principle:

1. The ball valve is not limited by the installation direction, and the flow direction of the medium can be arbitrary. The fluid resistance is small, and the full-bore ball valve basically has no flow resistance.

2. The ball valve is simple in structure, relatively small in size, light in weight, and easy to maintain.

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

4. The ball valve is suitable for frequent operation, opening and closing quickly and lightly. Easy to operate, quick to open and close, only need to rotate 90° from fully open to fully closed, which is convenient for long-distance control.

5. It is easy to maintain, the ball valve has a simple structure, the sealing ring is generally movable, and it is more convenient to disassemble and replace.

6. The ball valve has good sealing performance. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and the sealing surface of the valve will not be eroded when the medium passes through.

7. Wide range of applications, diameters ranging from small to several millimeters, large to several meters, and can be applied from high vacuum to high pressure.

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

9. The ball valve has small fluid resistance, no vibration and low noise.

The role of the ball valve:

The opening and closing part of the ball valve is a round sphere with a hole, and the ball core rotates 0-90° around the axis of the valve stem to achieve the purpose of opening or closing the valve. Ball valves have many functions. They are generally used to switch off or adjust the medium in the pipeline. Among them, the three-way ball valve can flexibly cut off, distribute and change the flow direction of the medium. The sealing surface of the ball valve is usually in a closed state with the spherical surface, so it is not easy to be eroded by the medium, easy to operate, simple and compact in structure, and can be used in working conditions with water, natural gas, acid, and solvent.

The purpose of the ball valve:

Ball valves can be generally divided into three categories: floating ball valves, fixed ball valves, and elastic ball valves according to their structural forms. According to different sealing performance, it is divided into hard sealing ball valve and soft sealing ball valve. Among them, soft sealing ball valve has better sealing performance and can achieve zero leakage. It is generally used in normal temperature and normal pressure pipelines with corrosive media, while hard sealing ball valve not only It can be used for normal temperature and normal pressure, as well as low temperature and low pressure and high temperature and high pressure pipelines.