... pressure:PN1.0Mpa 2.Nominal diameter:DN80-600mm wafer type swing check valve1.Nominal pressure:PN1.0Mpa2.Nominal diameter: ... PTieling Large Valve (Group) Co., Ltd. is one of the key enterprises in China. After our former company, Tieling Valve Works ... gate valves, check valves, air release valves, rotating strainers, comb type cleaning machines, gratings, steel penstocks, cool and hot isolating gates ...