The Double Flanged Butterfly Valve is a heavy-duty flow control solution engineered for large-diameter pipelines and high-pressure water distribution systems. Unlike wafer or lugged versions, this valve features two integral flanges that match standard pipe flange dimensions. This robust construction provides superior structural stability and makes it the industry standard for underground installations and critical infrastructure projects.
Designed for both isolation and throttling, the double flanged body ensures a secure, leak-proof connection that can withstand significant piping stress and thermal expansion.
Key Features & Benefits:-
- Maximum Structural Integrity: The heavy-duty flanged body provides high resistance against pipeline forces and bending moments, making it ideal for large-scale civil engineering and industrial projects.
- Bi-Directional Bubble-Tight Seal: Features a resilient, renewable seat (typically EPDM or Nitrile) that ensures a 100% leak-proof shut-off from either flow direction.
- Dead-End Service Capability: Because it is bolted directly to the pipe flanges, the double flanged design is inherently safe for end-of-line service, allowing for downstream maintenance while the upstream remains pressurized.
- Low Pressure Drop: The streamlined, eccentric, or concentric disc design minimizes turbulence and ensures maximum flow efficiency with minimal energy loss.
- Long-Term Durability: Often coated with high-quality fusion-bonded epoxy (FBE) to provide exceptional corrosion resistance in buried or submerged environments.
Technical Specifications:-
| Feature |
Specifications |
| Size Range |
4" to 80"+ (DN100 – DN2000+) |
| Pressure Ratings |
PN10, PN16, PN25 |
| Body Materials |
Ductile Iron (GGG40/50), WCB (Cast Steel), Stainless Steel |
| Disc Materials |
Ductile Iron (Epoxy Coated), SS304, SS316, Al-Bronze |
| Seat Materials |
EPDM (Standard), NBR (Nitrile), Viton, Metal-to-Metal |
| Face-to-Face |
ISO 5752, EN 558 Series 13 / 14, ASME B16.10 |
| Operation |
Worm Gearbox, Pneumatic, Electric, or Hydraulic Actuator |
Target Industrial Applications:-
The Double Flanged Butterfly Valve is the preferred choice for large-scale utility and industrial networks:
- Water Works & Municipalities: Main isolation valves for potable water transmission and distribution networks.
- Wastewater Treatment: Ideal for intake towers, effluent lines, and large pumping stations.
- Power Generation: Used in cooling water circuits, condenser systems, and intake structures.
- Desalination Plants: High-performance Al-Bronze or Stainless Steel versions for seawater handling.
- Dams & Reservoirs: Reliable flow regulation and isolation for large-bore gravity-fed systems.
Why Choose Double Flanged over Wafer or Lugged?
While wafer and lugged valves are suitable for smaller, above-ground applications, the Double Flanged Butterfly Valve is specifically engineered for reliability in large-scale piping. Its ability to be securely bolted and its rigid body construction make it far superior for buried service and high-velocity water mains where safety and longevity are the highest priorities.
