Secure & Versatile: Lug Type Butterfly Valves
Lug type butterfly valves are the premier choice for piping systems that require maximum operational flexibility, safety, and secure end-of-line isolation.
Featuring a robust outer body with protruding metal lugs, these valves have threaded bolt holes that match standard pipe flanges.
Instead of being sandwiched between flanges like a wafer valve, a lug valve is bolted directly to each individual flange from both sides using separate sets of bolts.
This independent bolting design makes lug valves uniquely capable of dead-end service, allowing you to completely disconnect downstream piping for maintenance or modifications while the upstream side remains safely under full pressure.
Why Choose a Lug Style Design?
- End-of-Line Isolation: Acts as a safe termination point in a pipeline, allowing downstream equipment to be isolated or removed without draining the entire system.
- Independent Flange Connection: Bolted securely from both sides, preventing the valve from shifting or losing its seal when one side of the pipe is disconnected.
- Heavy-Duty Structural Rigidity: The extra material and reinforced lugs provide exceptional structural strength, making them highly resistant to pipe stress and thermal expansion.
- Eliminates Threaded Studs: Uses standard machine bolts from either side, simplifying alignment and reducing installation time in tight spaces.
Key Technical Specifications
- Size Range Availability: Readily available from 2” (DN50) up to 24” (DN600)+ for heavy industrial and municipal infrastructure.
- Standard Flange Drilling: Threaded holes are precision-machined to match specific regional standards, including ANSI Class 150, PN10, and PN16.
- Resilient Liners: Fitted with high-performance elastomers like EPDM, NBR, or Viton (FKM) that provide a bubble-tight shut-off and double as the flange gasket.
