Ball valve is a kind of valve with ball as the opening and closing parts, realizing opening and closing by rotating 90°, widely used in petroleum, chemical industry, electric power, metallurgy, papermaking, medicine, water supply and drainage and other working conditions. It is suitable for water, steam, oil, natural gas, acid and alkali solutions and other media, with excellent sealing performance and corrosion resistance. Ball valve structure is simple, open and close quickly, small flow resistance, can realize the full diameter or reduce the diameter of the flow path design, easy to clean and maintain the pipeline. Its operation is lightweight, can be equipped with manual, pneumatic, electric and other driving methods to achieve remote automation control. The advantages of the product are reliable sealing, strong pressure resistance, long service life, and can work stably in high pressure, large diameter and frequent opening and closing conditions. Ball valve can not only realize the medium cut off and connection, but also can be used for flow regulation and distribution, is the modern fluid transportation and control system in the efficient, safe, energy-saving ideal choice.