1. The valve body and cover are cast, connected in the middle with bolts and nuts, and sealed with wrapped gaskets (made of stainless steel wire clamp flexible graphite). When customers have special requirements, metal rings can also be used for connection.

2. When the pressure levels are 900lb, 1500lb, and 2500lb, the middle chamber can adopt a pressure self tightening sealing structure, and the sealing performance increases with the increase of internal pressure, with high reliability.

3. The swing check valve adopts an internal rocker arm swing structure, and all the opening and closing parts of the valve are installed inside the valve body, without penetrating the valve body. Except for the sealing gasket or sealing ring at the middle flange, there is no external leakage point as a whole, which eliminates the possibility of valve leakage.