... Size from DN50-1800mm High quality and competitive price Manual Knife gate valve, wafer type knife gate valve, ... ). Seal: Rubber, PTFE, Stainless steel, Hard Alloy 5). Working temperature: Rubber <100'C, Hard-seal< 425'C 6). ... pressure(MPa)Body testing (MPa)Seal tesing (MPa)Working temperature (°C)Appropriate media1.0 1.61.5 2 ... steel Rubber,TPFE,stainless steel,hard alloy Manual flanged knife gate valve