... Nominal pressure:PN1.0Mpa 2.Nominal diameter:DN80-600mm wafer type swing check valve1.Nominal pressure:PN1.0Mpa2.Nominal ... tech enterprise.The main products : butterfly valves, gate valves, check valves, air release valves, rotating strainers, comb type cleaning machines, gratings, steel penstocks, cool ... manual, motor, pneumatic, hydraulic, motor and hydraulic types. wafer type swing check valve