Ball valve is not only simple structure, good sealing performance, and within a certain range of nominal pass after small volume, light weight, less material consumption, installation size is small, and the drive torque is small, easy to operate, easy to realize the rapid opening and closing, is one of the fastest growing valves varieties in last decade. Ball valve evolved by the plug valve, the opening and closing as a sphere, using a sphere around the axis of the stem rotate 90 ° the realization of the aim of opening and closing.The ball valve is mainly used to cut off, distribute and change the flow direction of the medium.
The ball valve designed with v-shaped opening also has good flow adjustment function. Especially in America, Japan, Germany, France, Italy, west, the industrial developed countries, such as ball valve has a very wide range of USES, use of variety and quantity continues to expand, and to the high temperature, high pressure, big, high sealing, long life, good regulation performance, and a multifunctional direction valve, its reliability and other performance indicators have reached a higher level, and has set up a part replace gate valve, cut-off valve, throttle valve.With the technical progress of the ball valve, there will be a wide range of applications in the foreseeable future, especially in the oil and gas pipelines, in the refining and dissolving devices, and in the nuclear industry. In addition, the ball valve will also be one of the dominant valve types in large and medium caliber and low pressure areas in other industries.