What Is The Role Of Ball Valve And Working Principle

d The ball valve evolve from the plug valve. Its opening and closing part acts as a sphere. The ball is rotated 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing. The difference is that the plug body is a sphere with a circular through hole or channel through its axis. The ratio of the spherical surface to the channel opening should be such that when the ball is rotated 90 degrees, all spherical surfaces should appear at the inlet and outlet, thus cutting off the flow. The function of the ball valve on the pipeline is mainly used to cut off, distribute and change the flow direction of the medium. The ball valve designed with a V-shaped opening also has a good flow regulation function. The ball valve not only has a simple structure and good sealing performance, but also has a small size, light weight, low material consumption, small installation size, small driving torque, easy operation, and easy to realize rapid opening and closing within a certain nominal passage range. One of the fastest growing valve varieties in the past decade. Especially in industrially developed countries such as the United States, Japan, Germany, France, Italy, Spain, and the United Kingdom, ball valves are widely used, and the varieties and quantities used continue to expand, and are moving towards high temperature, high pressure, large diameter, high sealing, and long-term use. With its long life, excellent regulating performance and multi-function in one valve, its reliability and other performance indicators have reached a high level, and it has partially replaced gate valves, globe valves and regulating valves. The ball valve only needs to be rotated 90 degrees and a small rotational torque to close tightly. In the completely equal valve body, the cavity provides a straight flow path with small resistance for the medium. It is generally considered that the ball valve is most suitable for direct opening and closing, but recent developments have designed the ball valve to have the function of throttling and controlling flow. The main feature of the ball valve is that it has a compact structure and is easy to operate and maintain. It is suitable for general working media such as water, solvents, acids and natural gas, and is also suitable for media with harsh working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be integral or combined. With the technological advancement of ball valves, they will be more widely used in the foreseeable short term, especially in oil and gas pipelines, refinery cracking units and the nuclear industry. In addition, ball valves will also become one of the leading valve types in large and medium diameter, medium and low pressure fields in other industries.