Forged steel ball valve - q347y / 647y / 947y forged steel ball valve is a new generation of high-performance ball valve, which is suitable for long-distance transmission pipeline and general industrial pipeline. Its strength, safety and resistance to harsh environment are specially considered in the design, and it is suitable for various corrosive and non corrosive media. Compared with the floating ball valve, when it works, all the forces generated by the fluid pressure in front of the valve on the ball are transmitted to the bearing, which will not make the ball move towards the valve seat, so the valve seat deformation is small, the sealing performance is stable, and the service life is long, which is suitable for high pressure and large caliber occasions. Advanced spring pre seat assembly, with self tightening characteristics, to achieve upstream sealing. Each valve has two seats, which can be sealed in each direction, so there is no flow restriction in the installation, which is two-way. The valve has two-piece and three-piece valve body structures. The middle flange is connected by bolts. The reinforced polytetrafluoroethylene is inserted into the stainless steel ring for sealing. The spring is set at the back of the steel ring to ensure that the valve seat is close to the ball and keep the sealing. The upper and lower valve stems are equipped with PTFE bearings, which can reduce friction and labor saving operation. There is no adjusting plate at the bottom of the small shaft to ensure the joint position of the ball and the sealing ring. Adopt the structure of full diameter to make the valve flow hole consistent with the inner diameter of the pipeline, so as to facilitate the pipeline cleaning.