Butterfly valve is a kind of simple and cheap valves but used broadly in almost all pipeline systems. Suzhou Sunco Valve can manufacture steel material butterfly valves from 2” to 240”, 150LB-2500LB, both soft and metal seat, both concentric and offset design, both flanged and wafer type as per API 609. We also can supply the iron material butterfly valves, such as the cast grey iron and ductile iron, but mainly outsourced from our qualified sub-suppliers.