... , AS 21294)F/F: ANSI B 16.10Brief Introduction:Butterfly valve is mainly consisted of body, stem, disc, seat and driver(lever, gearbox, pneumatic ... industry, Food, BeverageDetail Specification:Extension bar butterfly valve, long stem extension bar wafer butterfly valve: SizeDN40-DN1200End flangeANSI B 16.1, EN 1092, AS 2129Face to ...