Concentric Flange Type 12 16 48 Inch DN 80 Resilient Seat Butterfly Valve with Gearbox in China Market - China Pn16 Butterfly Valve, Water Valve | Made-in-China.com
Butterfly Valve End Connection Types | VALTECCN
TBL - 62128TE - CONCENTRIC FLANGED TYPE BUTTERFLY VALVE WITH HANDLE - TLSH Valves | Automatic Control Valves | Flow Control Solutions
What are the standard butterfly valve face to face dimensions?