Butterfly Valve, Check Valve manufacturer / supplier in China, offering Bigger Size Double Flanged Butterfly Valve En593 API609 Pn6/Pn10/Pn16/150lb/JIS5K/10K, Ggg40 Ggg50 A536 A395 Double Offset Flanged Butterfly Valve, Full Lugged Type Butterfly Valve with Halar Painting Coated and so on.