... , JB/T79, HG, SH, JIS, DIN, NF, BSMain materials: C.I,WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12MoTi, CF8, CF8M, CF3, 2Cr25Ni20Seal type: Stainlesss Steel ... : FlangeDriving devices: Pneumatic, manual, umbreall, gear, electric Wafer rising Stem Knife Gate Valve