The manual ball valve is a kind of valve that came out in the 1950s. In half a century, the ball valve has developed into a major valve type. The ball valve is mainly used to cut off or connect the medium, and can also be used for the regulation and control of the fluid. The V-shaped ball valve can carry out relatively accurate flow regulation and control, while the three-way ball valve is used to distribute the medium and change the flow direction of the medium. The manual ball valve is mainly named according to the driving method of the ball valve through the rotation of the handwheel or handle.

The working principle of the manual ball valve is to make the valve unblocked or blocked by rotating the valve core. The ball valve switch is light, small in size, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, the sealing surface and the spherical surface are often closed, and are not easily eroded by the medium, and are widely used in various industries.