... competitive price With handwheel, pneumatic, Bevel gear, Electric operated. Size from DN50-1800mm knife gate valveSpecifications ... '' inch3). 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' ... us for more information Electric knife gate valve