The ball valve is a valve that uses a sphere with a circular through hole as an opening and closing part, and the sphere moves with the valve stem to realize the opening and closing action. The opening and closing part of the ball valve is a holed sphere, which rotates around an axis perpendicular to the passage, so as to achieve the purpose of opening and closing the passage. Ball valves are mainly used to open and close the medium between pipelines and equipment. Under special circumstances, specially designed ball valves are often used as regulating control valves.
