guillotine valve with Pneumatic Drive for easy operating 2''~20'' PN6/PN10/ ... :ANSI B16.5, GB/T9113, JB/T79, HG, SH, JIS, DIN, NF,BSMain materials:WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12M02Ti, CF8, CF8M, CF3, CF3MSeal ... /pneumatic switchover Our company can produce various kinds of knife gate valve with high quality and best price.