Valve seat: Adopt the sealing surface surfacing method, which can reduce the deformation of the valve seat caused by external pressure. The surface material of the valve seat is Stellite alloy, which is firmly welded to the valve body. The hard-treated valve seat surface can ensure good wear resistance and corrosion resistance of the valve, and prolong the service life of the valve.

Process hole: insert the demolding pin to easily take the retaining ring out of the ring groove of the clapper nut assembly; use positioning screws to ensure a firm connection between the hinge and the clapper nut; when there is no medium flow, the valve clapper It can be tightened and closed by itself.

Pin shaft: Located in the center of gravity of the valve disc, it minimizes the rotation radius and speed of the valve seat surface.

Graphite sealing ring: It can maintain a good sealing effect under low pressure and high pressure, even under instantaneous high pressure and high temperature.