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China Suppliers Lug Butterfly Valve with EPDM Seal - Concentric Resilient Seated Factory Series LTD371X
| Valve Type: | Lug butterfly valve | Structure: | Concentric |
| Standard: | EN593 | Workmanship: | Investment casting |
| Sealing Direction: | Bidirectional | Sealing Grade: | Zero leakage |
| Temperature: | -20°C < T < 120°C | Operation: | Handle / Lever |
Handle
Various materials
Quick and precise opening and closing switches
Seal
EPDM seal, corrosion resistance, good sealing performance, good resilience, and aging resistance
Shell
Thickened valve body, enhanced impact resistance, and extended service life
Disc
Pinless disc, eliminate leakage and ensure durability
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Characteristics
The lug butterfly valve balances the compactness of the clamp valve with the stability of the single-sided flange connection. One end of it has an integral flange (lug), and the other end is a clamp type. During installation, only one side needs to be connected to the pipeline flange, and the other side needs to be fixed with a nut. This design eliminates the need for relying on flange alignment at both ends like clamp valves, making installation more convenient and reliable. It is particularly suitable for pipeline ends or situations that require frequent disassembly and maintenance, while avoiding stress issues that may arise from long bolt penetration. It is a preferred solution that balances space and stability requirements.
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Advantages
- 1 Single side flange connection: One end of the valve body comes with an integral flange (lug), and the other end is a clamp type. During installation, simply fix the protruding ear end to the pipeline flange with bolts and tighten the clamping end with nuts.
- 2 Easy maintenance: When maintenance or replacement of valve internal components is required, only one side of the connection needs to be disassembled to remove or rotate the valve as a whole from the pipeline. Maintenance operations are more convenient and efficient than double flange valves.
- 3 Superior stress resistance: It can better withstand the stress caused by vibration and thermal expansion from the pipeline, as well as the self weight of the valve, reducing the adverse effects of pipeline deformation on the valve sealing surface and helping to maintain the stability of sealing performance in the long term.
- 4 Wide application range: Very suitable for occasions that require frequent opening and closing or adjustment, and have requirements for installation reliability, such as circulating water systems, fire protection systems, ventilation systems, as well as atmospheric or medium low pressure pipelines in industries such as chemical and power.
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Packing
Standard export wooden case packaging
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Application Scenarios
The lug butterfly valves are widely utilized across industrial, municipal, and specialized systems, leveraging their robust lug connection, balanced compactness and reliability, bidirectional sealing capability, and compatibility with medium-low to medium-high pressure conditions. Their unique design makes them ideal for scenarios requiring frequent maintenance, stable sealing, or adaptability to diverse media.
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Frequently Asked Questions
Q
What is a lug butterfly valve and how does it differ from a wafer butterfly valve?
A lug butterfly valve features threaded inserts (lugs) around its body, allowing it to be bolted directly to a single flange without requiring a companion flange on both sides. In contrast, a wafer butterfly valve is sandwiched between two pipeline flanges using long bolts. The lug design makes it suitable for dead-end service and easier single-side maintenance.
Q
What temperature range is this lug butterfly valve suitable for?
This lug butterfly valve is rated for operating temperatures between -20°C and 120°C, making it suitable for a wide range of industrial and commercial pipeline applications including water treatment, HVAC, and general fluid control systems.
Q
What sealing material is used, and what are its key properties?
The valve uses an EPDM (Ethylene Propylene Diene Monomer) seal, which offers excellent corrosion resistance, outstanding sealing performance, strong resilience, and superior aging resistance. This makes it ideal for water, steam, and mild chemical media applications.
Q
Is this lug butterfly valve suitable for dead-end service?
Yes. Because of its lug-style body with integral threaded inserts, this valve can be used for dead-end service — meaning it can be installed at the end of a pipeline and maintain a pressure-tight seal even when the downstream piping is removed, without the need for a downstream flange.
Q
What industries and systems are lug butterfly valves commonly used in?
Lug butterfly valves are widely used in circulating water systems, fire protection systems, HVAC and ventilation systems, chemical processing pipelines, power generation facilities, and municipal water supply and drainage systems. They are especially preferred in applications requiring frequent operation, reliable sealing, and easy maintenance.
Q
What standard does this valve comply with, and what is the manufacturing process?
This lug butterfly valve complies with the EN593 standard, which is a widely recognized European standard for industrial butterfly valves. The valve body is manufactured using investment casting, a precision casting process that ensures consistent wall thickness, superior surface finish, and enhanced structural integrity for long-term reliable performance.