... Knife gate valves with handwheel,pneumatic,electric JIS, ANSI,DIN,GB standard Size DN50-1800mm NPS:2''-72'' Inch Api 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 standard ... us for more information. API Knife gate valve