... valve Size from DN50-1800mm High quality and competitive price Manual Knife gate valve, wafer type knife gate valve, Lug knife ... ,Cast steel knife gate valve, Stainless steel knife gate valveSpecifications:Design and manufacture standard: GB/T, ANSI, JIS, DIN1). Pressure: 0 ... stainless steel stainless steel Rubber,TPFE,stainless steel,hard alloy Manual flanged knife gate valve