The three-part connected forged steel fixed ball valve is divided into three parts by the valve body in two seats along the cross section perpendicular to the axis of the valve channel. The whole valve is symmetrical along the central axis of the valve stem. It is mainly used to cut off, distribute and change the direction of medium flow in the pipeline.Its large pivot ensures accurate center position of the ball under high pressure, which ensures good operation performance of the valve.The standard valve seat adopts the spring structure, pushes the valve seat towards the ball, guarantees the good import and export two-way sealing performance;Using its own discharge valve, the body cavity can be discharged outwards;The pivot adopts blowout protection structure to prevent leakage effectively.Low friction coefficient bearing, so that the torque is reduced to the minimum, easy to open and close the valve;Effective contact between valve stem and valve body makes anti-static grounding device have superior performance.It has the advantages of excellent performance, high reliability, wide application and reasonable price.