Butterfly Valve, Check Valve manufacturer / supplier in China, offering ISO5752 API594 En558 Wafer Dual Plate Check Valve with Aluminium Bronze Disc, Non Return Butterfly Check Valves with Di/Ggg40/Ggg50/Ss/SS304/SS316/Al-Bronze Body and Disc, Full EPDM/NBR/FKM Rubber Liner Non Return Valve Duo Check Valves and so on.