Teflon lined lug type butterfly valve, uses the flexibility of rubber or PTFE seat, could easily achieve zero leakge, therefore is a widely applied valve in oilfield, agriculture, water & waste water and mining industries. Due to its rubber/PTFE lined body materials, it is usually used in low pressure lines.
Teflon lined lug type butterfly 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 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.
A lug type butterfly valve used in dead end service generally has a reduced pressure rating. For example a lug type butterfly valve mounted between two flanges has a 150 psi pressure rating. The same valve mounted with one flange, in dead end service, has a 75 psi rating.
Features of teflon lined lug type butterfly valve:
Center Line Resilient Seated
Full teflon Lined (FEP, FPA, PTFE) for High Corrosive Media
a) Design & Manufacture: API 609, EN 593, AWWA C504
b) Face to Face Dimension: API 609, EN 558
c) End Connection: ASME B16.5, EN 1092
d) Test and Inspection: API 598, EN 12266
Sizes: 2" - 48" or DN50 - DN1200
Pressure Rating: Class150 or PN10 - PN16
Materials of Valve Body: GG25, A126 B, GGG40, A536, WCB, LCB, CF8, CF3, CF8M, CF3M, etc.
Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator