Butterfly Valve, Gate Valve, Check Valve manufacturer / supplier in China, offering Wafer Centerline Butterfly Valve with Rubber Seal, EPDM/NBR/PTFE Seat, API 609 Wafer Centerline Butterfly Valve with EPDM Seat, Rubber Seal, and CE Approval, Tfw 4 Inch API 609 Wafer Butterfly Valve EPDM Seal and so on.