... type swing check valve 1.Nominal pressure:PN1.0Mpa 2.Nominal diameter:DN80-600mm wafer type swing check valve1.Nominal ... in China. After our former company, Tieling Valve Works was reformed. We are the largest manufacturing ... .The main products : butterfly valves, gate valves, check valves, air release valves, rotating strainers, comb type ... , motor and hydraulic types. wafer type swing check valve