Stainless steel ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries, and occupy a pivotal position in the national economy. It has the action of rotating 90 degrees, and the cock body is a sphere with a circular through hole or channel passing through its axis. The stainless steel ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. The stainless steel ball valve only needs to be rotated 90 degrees and can be closed tightly with a small torque. Ball valves are suitable for on-off and shut-off valves.