Ball valves are divided into pneumatic ball valves, electric ball valves and manual ball valves. The ball valve body can be one whole part, and it can also be combined.
The
ball valve is evolved from the plug valve. Its opening and closing parts are as a ball and it uses the ball around the stem axis rotation 90° to achieve the purpose of opening and closing. The ball valve is mainly used to cut off, distribute and change the direction of medium flow in the pipeline. The ball valve with v-shaped opening also has a good flow regulation function.
The ball valve has the characteristics of compact structure, good sealing performance, light weight, less material consumption, small installation size, small driving torque and simple operation. It is easy to get those characteristics of fast opening, closing and convenient maintenance.
Selection features: the ball valve is not only suitable for water, solvent, acid and natural gas and other general working medium, but also suitable for bad working conditions of the medium, such as oxygen, hydrogen peroxide, methane, ethylene, fiber, small solid materials and other media.
The ball valve came out in the 1950s. With the rapid development of science and technology, the production technology and product structure is increasingly improved. In a short period of 40 years, it has rapidly developed into a major valve category. In western industrial developed countries, the use of ball valves is rising year by year. In China, the ball valve is widely used in the petroleum refining, long-distance pipeline, chemical, paper, pharmaceutical, water conservancy, electric power, municipal, steel and other industries. It plays a pivotal role in the national economy. It has a 90 degree rotation.
The ball valve in the pipeline is mainly used to cut off, distribution and change the flow direction of the medium. It only needs to rotate 90 degrees of operation and the ball valve can be closed tightly by a small torque. The ball valve is most suitable for switches, V-type ball valves and cutting off valves.
In addition to the pipe parameters, special attention should be paid to the environmental conditions of the use of the electric valve. Because the electric device in the electric valve is a mechanical and electrical equipment, its use state is greatly affected by the environment.
