... DN50-180 JIS Knife gate valve, cast steel / stailess steel Knife gate valve, Chain wheel knife gate valve, pneumatic knife gate valve, electric knife gate valve. Knife gate valveDesign and manufacture ... SS301, 316L), Cast Iron 4). Seal: Rubber, PTFE, Stainless steel, Hard Alloy 5). Working temperature: Rubber <100'C, Hard-seal< 425'C ... . Welcome to contact us for more information. 5K Knife gate valve