A Lug Butterfly Valve is a type of valve commonly used in piping systems for regulating or controlling the flow of fluids. It is a variant of the butterfly valve that features lug-style threaded connections on both sides of the valve body, which allows it to be mounted between two flanged pipe ends without the need for additional support.
Lug Connection: The valve has threaded lugs on both sides of the valve body, allowing the valve to be bolted directly to the pipe flanges. This makes it suitable for applications where the valve may need to be isolated and removed without affecting the rest of the system.
Bidirectional Flow: The lug butterfly valve can be used in both directions, which is beneficial in systems where the direction of flow may change or needs to be controlled from either direction.
Compact Design: Like other butterfly valves, the lug butterfly valve has a compact and lightweight design compared to other valve types, making it ideal for applications with limited space.
Quick Operation: The butterfly valve is typically operated by a hand lever, Gear Box,electric actuator, or pneumatic actuator, offering quick and easy operation.
Low Pressure Drop: These valves are designed to offer minimal resistance to fluid flow, reducing energy consumption and optimizing system efficiency.
Corrosion and Wear Resistance: Lug butterfly valves can be made from various materials, such as stainless steel, cast iron, and ductile iron, which offer good resistance to corrosion and wear, depending on the application.
Applications:
Water Treatment: Used to control flow in water and wastewater treatment plants.
HVAC Systems: Used in heating, ventilation, and air conditioning systems to regulate air flow.
Piping Systems: Common in industries like chemical, food processing, and oil & gas for isolating and controlling fluid flow.
Fire Protection: Utilized in fire suppression systems to isolate pipelines.
Advantages:
Ease of Maintenance: The lug design allows the valve to be replaced or serviced without removing the entire pipeline, which is useful in systems where the pipeline cannot be easily disconnected.
Flexibility: The valve can be mounted between two flanges, or between a flange and a blind flange, providing more installation flexibility than other valve types.
Compactness: These valves are space-efficient and generally lighter than other valve types like gate or ball valves.
Working/Testing Pressure
Size
DN
40mm-300mm
350mm-1200mm
Inch
1-1/2''-12''
14''-24''
Working
16bar
10bar
Testing
Shell
24bar
15bar
Seal
17.6bar
11bar
Working Temperature
Seat Material
EPDM
NBR
FKM
PTFE
Temperature
-10℃ to 120℃
-10℃ to 80℃
-15℃ to 200℃
-25℃ to 180℃
Material Specification
Part
Material
Body
Cast Iron Ductile Iron WCB CF8 CF8M CF3M Duplex Steel Al-Bronze
Disc
Ductile Iron CF8 CF8M CF3M Duplex Steel Al-Bronze Harlar Coated
Shaft
SS410 SS416 SS420 SS431 SS316 17-4PH
Seat
EPDM NBR PTFE FKM Silicone
Bushing
FRP PTFE Bronze
Lever
Malleable Iron Carbon Steel Aluminum SS316
Gear Box
Ductile Iron Aluminum SS316
Corrosion Protection
Epoxy Resin Powder Spray,The minimum thickness is not less than 300 microns
Disc Options
Through shaft with Pin Pinless disc Slim disc concentric design(DN50-DN350)
Seat Options
Cartridge rubber seat Tongue and Groove/Replaceable Seat
NOTE:
*The shaf end can be doubl D and key connecton. From DN700 and above, the shaf end is double key type.
*The flange connecton of the above table can be DIN2501 PN16, ASME B16.47-A 125/150LB, BS4504 PN10/PN16, JIS 10K,Table D ,Table E
* DN400’s valve face to face can be 85.7mm & 102mm. DN450’s valve face to face can be 104mm & 114mm
Butterfly Valve Manufacturing Process From Technical Confirmation to Final Delivery
Standardized Quality Control Process
From raw material inspection to final delivery, every butterfly valve undergoes a comprehensive quality inspection to ensure reliable performance and compliance with international standards.
International Certifications
Manufactured to international quality standards and certified for global industrial and potable water applications.