Huadian Pump Valve Company produces and sells floating cast steel ball valve opening and closing parts (balls) driven by the valve stem, and around the axis of the valve stem for rotary movement of the valve. It is mainly used to cut off or connect the medium in the pipeline, and can also be used for fluid adjustment and control, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal seat of surfacing cemented carbide, especially suitable for media containing fibers, tiny solid pellets and so on. Cast steel ball valves are generally divided into handle cast steel ball valves, pneumatic cast steel ball valves, electric cast steel ball valves, cast iron ball valves, stainless steel ball valves, all copper ball valves, etc. The ball of the ball valve is floating, under the action of medium pressure, the ball can produce a certain displacement and press on the sealing surface of the outlet end to ensure that the outlet end is sealed. The structure of the floating ball valve is simple and the sealing is good, but the load borne by the ball working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves.