... knife gate valve Size from DN50-1800mm carbon steel, stainless steel ISO, API CE certificate Pneumatic Knife gate ... 2''TO 72'' inch3). Body, Bonnet, material: Carbon Steel (WCB), Stainless Steel (SS304, SS316, SS301, 316L), Cast Iron 4). ... Body,cover Gate Stem Seal surfacestainless steel,carbon steel,cast iron stainless steel stainless steel Rubber,TPFE,stainless steel,hard alloy ( function(){ var ...