Details and applications of the ball valve
Ball valve appeared in the 1950s, with the rapid development of science and technology, continuous improvement of production process and product structure, in just 40 years, it has rapidly developed into one of the main valves. In Western industrialized countries, the ball valve use is on the increase year by year, in China, the valve is widely used in petroleum refining, long-distance pipelines, chemical, paper, pharmaceuticals, water conservancy, power, municipal, steel and other industries, in the national economy occupies a pivotal position. 
It has 90 degrees of movement and special features, cock body is a sphere, a circular through-hole or channel through its axis. Valve in the pipeline is mainly used for cutting, distribution and change the direction of flow of the medium, it only needs can be closed tightly with a 90-degree rotation of the operation and a small torque. Do most suitable valve switch, cut off valve, V-ball. Electrically operated valve should be noted that in addition to the pipeline parameter, there should be special attention to the environmental conditions of its use, since the electric device in electric valve is a mechanical and electrical equipment, which use station is impacted greatly by the environment.