The Wafer Type Semi-Lugged Butterfly Valve is a versatile and cost-effective flow control solution designed for high-efficiency liquid and gas regulation. Featuring a unique "semi-lugged" body, this valve includes four or more alignment holes that guide bolts during installation, ensuring perfect centering between flanges.
Engineered with a slim, lightweight profile, it provides a reliable, bubble-tight seal while significantly reducing the footprint and weight of your piping system compared to traditional gate or globe valves.
Key Features & Benefits:-
- Precision Alignment: The semi-lugged design features integrated bolt guides that ensure the valve is perfectly centered between pipe flanges, preventing leaks caused by misalignment.
- Bubble-Tight Shut-Off: Equipped with a resilient, replaceable seat (EPDM, Nitrile, or Viton) that provides a 100% leak-proof seal in both directions.
- Low Operating Torque: The polished disc and streamlined seat design minimize friction, allowing for easier manual operation or the use of smaller, more economical actuators.
- Space-Saving Wafer Profile: The ultra-compact face-to-face dimension makes it the ideal choice for modular systems and tight mechanical rooms.
- Anti-Blowout Stem: Designed with a high-strength, one-piece stem or splined drive for maximum safety and durability under high-pressure conditions.
Technical Specifications:-
| Feature |
Specifications |
| Size Range |
1.5" to 24" (DN40 – DN600) |
| Pressure Ratings |
PN10, PN16, ANSI Class 150 |
| Body Materials |
CI (Cast Iron), DI (Ductile Iron), WCB, CF8M (316 SS) |
| Disc Materials |
Nylon Coated DI, SS304, SS316, Al-Bronze |
| Seat Materials |
EPDM (Standard), Viton (FKM), Nitrile (NBR), PTFE |
| Operation |
Hand Lever, Worm Gear, Pneumatic, or Electric Actuator |
Target Industrial Applications:-
The Semi-Lugged Butterfly Valve is a "multipurpose" workhorse suitable for various sectors:
- HVAC & R: Ideal for chilled water, condenser water, and hot water isolation in commercial buildings.
- Water Treatment: Used extensively in municipal water supply, filtration systems, and wastewater plants.
- Fire Protection: Reliable isolation for fire sprinkler systems and pump houses.
- Agriculture & Irrigation: Efficient flow control for large-scale irrigation and pumping stations.
- Industrial Utilities: Suitable for air, vacuum, and non-corrosive chemical transport.
Why Choose Semi-Lugged over Standard Wafer?
While a standard wafer valve relies entirely on the clamping force of the surrounding bolts, the Semi-Lugged version provides additional stability during installation. The partial lugs act as a safety feature, holding the valve in place while the bolts are tightened, making it a preferred choice for vertical pipelines or larger diameter installations where handling is a concern.
