... valve manufacturers and suppliers in China and equipped with a productive factory, Shanghai Hugo Valve Co.,Ltd is always at your service. No-pin wafer butterfly valve Description ... Ductile Iron, WCB, CF8,CF8M, Al-bronze C958 ( single stem & no-pin) Stem Materials: SS416, SS304, SS316 ... Standard : ANSI,DIN,JIS End Connection: Wafer, lug Operate: Manual, available for worm gear, double acting & spring ...