... to face dimensiions adopt short series, and light weight valve is adopted, so as to save pipe supporter.2 ... residue discharge so that the valve can be operated withoyt blocking.4.The valve adopts wafer type connection.5. ... : ANSI B16.5, GB/T9113, JB/T79, HG, SH, JIS, DIN, NF, BSMain materials: C.I,WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12MoTi, ... manual, umbreall, gear, electric Wafer rising Stem Knife Gate Valve