All parts of forged steel fixed ball valve series are forged, the overall structure of the valve is compact, small size, good rigidity, suitable for high pressure and large caliber pipeline selection, the valve seat adopts spring cut off the active structure, and can be designed according to customer requirements into a two-way inlet seal, one-way in and out at the same time seal, through precise calculation of the valve seat pressure cross-sectional area, To ensure that the valve can be cut open and closed under high pressure; Using its own discharge valve, when the valve body cavity unexpectedly boost pressure, can effectively ensure the safety of the valve; The valve shaft adopts anti-blowing protection structure, three sealing measures; Low friction bearing, no contact between stem and valve body, easy to open and close the valve. ​