... :PN1.0Mpa 2.Nominal diameter:DN80-600mm wafer type swing check valve1.Nominal pressure:PN1.0Mpa2.Nominal diameter:DN80-600mm3.features ... high-tech enterprise.The main products : butterfly valves, gate valves, check valves, air release valves, rotating strainers, comb type cleaning machines ... , motor, pneumatic, hydraulic, motor and hydraulic types. wafer type swing check valve