... be operated withoyt blocking.4.The valve adopts wafer type connection.5.The wedge type limit stopper can provide sealing force, reliable ... : ANSI B16.5, GB/T9113, JB/T79, HG, SH, JIS, DIN, NF, BSMain materials: C.I,WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12MoTi, CF8, CF8M ... devices: Pneumatic, manual, umbreall, gear, electric Wafer rising Stem Knife Gate Valve