Compared with 2pcs Ball Valve, the advantage is that it is partially removable and can be closed tightly with only 90 degrees of rotation and very small rotating moment. Fully equal body chamber provides a direct flow path with little resistance to the medium. It is generally believed that ball valves are most suitable for direct opening and closing. Nowadays the ball valves could be used to throttle and control flow. Due to the compact structure, easy operation and maintenance. It is suitable for general working media such as water, solvent, acid and natural gas. It is also suitable for medium with poor working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. Three-piece ball valve body is the assembled one.