... to sealing.3.The blade type gate disic helps medium cutoff anf residue discharge so that the valve can be operated withoyt ... : C.I,WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12MoTi, CF8, CF8M, CF3, 2Cr25Ni20Seal type: Stainlesss Steel Hard Seal, Teflon Soft SealLeakage: Stainlesss Steel Hard ... Leakage Accessories: FlangeDriving devices: Pneumatic, manual, umbreall, gear, electric Wafer rising Stem Knife Gate Valve