Ball valve, the opening and closing parts (spheres) are driven by the valve stem and rotate around the axis of the ball valve. It can also be used for fluid regulation and control, in which the V-shaped ball valve with hard seal has a strong shear force between the V-shaped ball core and the metal seat of surfacing cemented carbide, especially suitable for the medium containing fiber, small solid particles and so on. The multi-pass ball valve can not only flexibly control the confluence, shunt, and flow direction of the medium on the pipeline, but also can close any channel and make the other two channels connected. This type of valve should generally be installed horizontally in the pipeline. Ball valve according to the driving mode is divided into: pneumatic ball valve, electric ball valve, manual ball valve.