Standard GB/T21465-2008 "valve terms" are defined as opening and closing (sphere) driven by the valve stem, and round ball valve axis rotation movement of the valve. Can also be used on regulation and control of fluid, including hard seal ball valve v-shaped the v-shaped ball core of carbide surfacing with strong shear force between metal valve seat, especially suitable for fiber, tiny solid material, such as medium. And ball valve in the pipeline is not only more connected to the confluence of flexible control medium, shunt, and the flow switch, at the same time also can close any channel and make the other two. This valve shall generally be installed in the pipeline. Ball valve according to drive mode can be divided into: pneumatic ball valves, electric ball valves, manual ball valve.