Lug Type Butterfly Valves: Versatile Isolation and End-of-Line Service
A Lug Type Butterfly Valve is distinguished by the threaded metal "lugs" (ears) surrounding the entire circumference of the valve body. Unlike the wafer type, which is simply sandwiched between flanges, the lug valve is bolted directly to each flange using separate sets of bolts. This allows one side of the piping to be disconnected while the other remains under pressure.
The FlowBiz Technical Advantage
- Independent Bolting: Because the lugs are tapped (threaded), nuts are not required. This unique design allows the valve to stay securely attached to one flange even if the piping on the opposite side is removed.
- End-of-Line Reliability: While a blind flange is always suggested for safety, our lug valves are specifically designed to function as an end-of-line isolation point.
- Resilient Sealing: We utilize a wide variety of high-grade elastomers including EPDM, Viton, and PTFE to ensure a bubble-tight seal in concentric designs.
- Temperature Resilience: Our unique end-connection style ensures that thermal expansion and contraction have minimal impact on the valve's sealing integrity.
Technical Specifications
Feature | Details |
Size Range | DN50 to DN300 |
Pressure Ratings | PN6, PN10, PN16, Class 125/150 |
Body Materials | Ductile Iron, Cast Iron, WCB, Stainless Steel |
Disc Materials | CF8, CF8M, Ductile Iron, Al-Bronze C958 |
Seat (Core) Materials | NBR, EPDM, Hypalon, Viton, Neoprene, PTFE |
Operating Temp | -20°C to 120°C |
Operation | Lever Handle or Worm Gear |
Lug Type vs. Wafer Type: Key Differences
Understanding these differences is critical for selecting the right valve for your plant maintenance schedule:
- Maintenance: With a Wafer Valve, the entire system must be shut down to replace or repair any part of the line. With a FlowBiz Lug Valve, you can disconnect the downstream piping while the valve remains closed and bolted to the upstream flange.
- Bolting: Wafer valves use long through-bolts; Lug valves use shorter bolts that thread directly into the valve body.
- Cost vs. Utility: While the lug type is a larger investment due to the additional metal and machining of the lugs, it offers significantly higher operational flexibility.
Core Applications
- Water & Wastewater: Distribution lines and treatment plants.
- Chemical & Petrochemical: Handling process fluids and slurries.
- HVAC Systems: Chilled water and condenser water lines.
- Marine: Shipboard piping and cooling systems.
FlowBiz Exports: Your Partner in Flow Control
As a top-tier Lug Type Butterfly Valve manufacturer in India, FlowBiz Exports delivers precision-engineered solutions to global markets including Dubai, Turkey, Africa, and Southeast Asia.
Our Complete Range:
- Valves: Gate, Globe, Check (NRV), Ball, and Knife Edge Gate Valves.
- Specialty: PFA/FEP Lined Valves and Glandless Piston Valves.
- Filtration: Y-Type, Basket, and Conical Strainers.
Do you need to perform pipeline maintenance without a total system shutdown?
Upgrade to the FlowBiz Lug Type Butterfly Valve for superior flexibility and safety. Contact our technical team today for a material compatibility consultation and a customized quote for your facility.