Butterfly valve

manualisolationfor chemicals

Fully Lined Concentric Butterfly Valve The Fully Lined Concentric Butterfly Valves is designed to maintain a seal against bi-directional pressure differential to prevent backflow in systems designed for unidirectional flow. It accomplishes this with a tightly fitting seal, i.e., gasket, 0o-ring, precision machined, and a flat valve face on the upstream and downstream sides of the valve, valves have threaded inserts at both sides of the valve body. This allows them to be installed into a system using two sets of bolts and no nuts. The valve is installed between two flanges using a separate set of bolts for each flange. This setup permits either side of the piping system to be disconnected without disturbing the other side. Features – ISO5211 direct mounting pad for easy automation – Isolation height according to plant prescription – Dirt scraper prevents moisture penetrating into the shaft area – Three PTFE impregnated SS316L bearings are provided for precision alignment of the disc-shaft – 3 layers sealing system ensures environment protection – PTFE seat and rubber seat version interchangeable each other• PTFE-liner for chemically toxic and highly corrosive media, rubber liner for various of industry applications – Silicon rubber energized back behind PTFE seat makes the sealing between liner and disc stable and offer a wide range of temperature – One-piece disc-shaft design reduces the valve torque and increases Kv – PTFE or rubber lined disc design option avoids high cost by expensive metal in corrosive applications – Bubble-tight shut of at full pressure rating