wafer type swing check valve 1.Nominal pressure:PN1.0Mpa 2.Nominal diameter:DN80-600mm wafer type swing check valve1.Nominal ... .The main products : butterfly valves, gate valves, check valves, air release valves, rotating strainers, comb type ... .5Mpa; Nominal diameters: DN50-DN3000; actuating methods: manual, motor, pneumatic, hydraulic, motor and hydraulic types. wafer type swing check valve