The Butterfly Valve – Lug Type is the newest addition to our family of high quality Valves. Also Offered in wafer and flanged style. These valves are available with Ductile Iron, Carbon Steel (A216-WCB) or Stainless steel (A351-CF8M). These valves are in stock with both BUNA-N and EPDM liners. Viton and Teflon liners are available upon request.
The new designs incorporates a one-piece stem with an important new feature. The disc is broached to fit the milled square stem which causes the disc to float, giving substantially improved torque valves.
It is also available with lever operators and worm gear operators and feature bubble tight shut-off. In conclusion, the lug configuration is suitable for dead-end service. All Butterfly Valves can be modified with extensions and various actuators.
The Lug Type provides ease of operation with quarter-turn (90 degrees) open to close. With the internal stem/disc geometric drive design, there is no need for pins or bolts that may create leak paths or turbulence in the waterway. An extended neck allows for insulation up to 2 inches.
Lug-style butterfly valve
Lug-style valves have threaded inserts at both sides of the valve body. The valve is installed between two flanges using a separate set of bolts for each flange.
A lug-style butterfly valve used in dead end service generally has a reduced pressure rating. For example, a lug-style butterfly valve mounted between two flanges has a 1,000 kPa (150 psi) pressure rating. In addition, the same valve mounted with one flange, in dead end service, has a 520 kPa (75 psi) rating. Lugged valves are extremely resistant to chemicals and solvents and can handle temperatures up to 200 °C, which makes it a versatile solution.