... 1800mm NPS:2''-72'' Inch Api Knife gate valve, cast steel / stailess steel Knife gate valve, Chain wheel knife gate valve, pneumatic ... 2). Size: 50-1600mm 3). Body, Bonnet, material: Carbon Steel (WCB), Stainless Steel (SS304, SS316, SS301, 316L), Cast Iron 4). Seal: ... Rubber, PTFE, Stainless steel, Hard Alloy 5). Working temperature: Rubber <100'C, Hard-seal ...