... valve Size from DN50-1800mm High quality and competitive price Manual Knife gate valve, wafer type knife gate valve, Lug knife ... 4). Seal: Rubber, PTFE, Stainless steel, Hard Alloy 5). Working temperature: Rubber <100'C, Hard-seal< 425'C 6). Suitable Media: Paper ... ,cast iron stainless steel stainless steel Rubber,TPFE,stainless steel,hard alloy Manual flanged knife gate valve