Floating ball valve is characterized by the main ball without the support shaft, the ball is two seats holding the "floating" state, which is mainly used in the pipeline to cut off, distribute and change the direction of medium flow. The main features of the floating ball valve seat seal design, reliable sealing valve stem seal, fire electrostatic function, automatic pressure relief and locking devices and other structural features. Floating ball valve for: chemical, petroleum, natural gas, metallurgy, and other industries and containing hydrogen sulfide medium, impurities, serious corrosion of natural gas long-distance pipeline. Floating ball valve's main structural features are: 1. The valve is provided with open and close position instructions; 2. Locking device; 3. Stem fly-proof structure; 4. Antistatic device; 5. Fireproof structure; 6. Unique seat sealing structure ; 7. flange (body and left body connection) no leakage structure.