China, API 609, Metal to Metal, Seat, Triple Offset, Eccentric, Butterfly Valve, Welded, Wafer, Lugged, Flanged, Manufacture, factory, price, Caron Steel, Stainless Steel, A216 WCB, WC6, WC9, A352 LCB, A351 CF8, CF8M, CF3, CF3M, A995 4A, A995 5A, A995 6A. Pressure from Class 150LB to 2500LB.