The Wafer Type Full Lugged Butterfly Valve is a robust and highly versatile flow control solution engineered for heavy-duty industrial piping. Unlike standard wafer valves, the Full Lugged design features threaded bolt holes (lugs) across the entire circumference of the valve body. This allows the valve to be bolted directly to each pipe flange independently.
This critical design feature makes it the premier choice for dead-end service, allowing for the downstream piping to be disconnected or serviced while the upstream side remains under full system pressure.
Key Features & Benefits:-
- Dead-End Service Capability: The threaded lugs allow the valve to remain securely attached to one flange even if the opposite side of the piping is removed. This is essential for maintenance, tank isolation, and pump discharge lines.
- Bi-Directional Bubble-Tight Seal: Features a precision-machined disc and a resilient, replaceable seat (EPDM, Viton, or Nitrile) that ensures a 100% leak-proof seal from either flow direction.
- Heavy-Duty Body Construction: The full-lugged body provides superior structural integrity and resists piping stress and thermal expansion more effectively than standard wafer designs.
- Streamlined Flow: The thin-profile disc is designed to provide maximum flow capacity with minimal turbulence and pressure drop when fully open.
- Blow-out Proof Stem: Engineered with a high-strength, reinforced stem assembly to ensure operational safety and long-term reliability under high-torque conditions.
Technical Specifications:-
| Feature |
Specifications |
| Size Range |
2" to 36" (DN50 – DN900) |
| Pressure Ratings |
PN10, PN16, ANSI Class 150 / 300 |
| Body Materials |
Ductile Iron (GGG40/50), Cast Steel (WCB), Stainless Steel (CF8M) |
| Disc Materials |
Stainless Steel 316, Al-Bronze, Nylon Coated DI, Hastelloy |
| Seat Materials |
EPDM, BUNA-N (Nitrile), Viton (FKM), PTFE (Teflon) |
| Operation |
10-Position Lever, Worm Gear, Pneumatic, or Electric Actuator |
Target Industrial Applications:-
The Full Lugged Butterfly Valve is the industry standard for critical isolation and regulation:
- Water & Wastewater: Ideal for pump stations, filtration plants, and isolation of storage tanks.
- Chemical & Petrochemical: Used for handling corrosive media and aggressive fluids in processing plants.
- HVAC & Utilities: Reliable control for large-scale chilled water, hot water, and air systems.
- Marine & Shipbuilding: Used in ballast systems, fire mains, and fuel oil transfer lines (Al-Bronze/SS configurations).
- Food & Beverage: Available with food-grade EPDM seats and polished SS discs for sanitary applications.
Why Choose Full Lugged over Standard Wafer?
While standard wafer valves are lighter, the Full Lugged Butterfly Valve offers significantly more safety and flexibility. Because it is bolted directly to the flanges, it eliminates the risk of the valve "shifting" during installation and provides the structural support necessary for end-of-line service—a task standard wafer valves cannot safely perform.
