Lug Type Butterfly Valve
Tianjin Liangfa Technology Co., Ltd. is It is a large-scale valve manufacturing company integrating R&D, production and sales. The main products include butterfly valves, high temperature and high pressure valves, gate valves, check valves, globe valves, regulating valves, ball valves, water supply and drainage valves, marine valves, API valves and other series.
Why choose us
Professional team
We have a professional team that is familiar with product performance, can understand customer needs in a timely manner, and can fully demonstrate product advantages. We are equipped with professional after-sales service personnel to ensure that we respond to user requests within 24 hours and put forward practical solutions.
Our certificates
Our products have passed ISO9001:2000 international quality management system certification, ISO14001:2004 environmental management system certification, and GB/T28001-2001 occupational health and safety management system certification.
Production equipment
We have all kinds of sophisticated large and medium-sized main production equipment and main inspection and testing equipment and instruments.
Easier Installation in Multiple Situations: The lug type valve has threaded holes in the body, which allow it to be bolted directly to the flanges on both sides of the pipeline. This gives more flexibility during installation and maintenance because it can be installed between two flanges without needing additional external support.
Can Be Removed Without Disrupting the System: In cases of maintenance or replacement, a lug-type valve can be removed and replaced without needing to disassemble the entire pipeline system. The flange connections hold the valve in place, so there's no need to remove or disrupt the adjoining pipeline.
Higher Mechanical Strength: Because of the threaded lugs, this valve type generally provides better mechanical strength, making it more suitable for high-pressure or larger-diameter applications.
More Versatility: It can be used for both end-of-line and mid-line applications, offering more versatility in installation locations.
Lugged Butterfly Valve Dimensions
| DN50 (2 inches) | 140 mm (5.51 inches) x 140 mm (5.51 inches) |
| DN65 (2.5 inches) | 170 mm (6.69 inches) x 170 mm (6.69 inches) |
| DN80 (3 inches) | 200 mm (7.87 inches) x 200 mm (7.87 inches) |
| DN100 (4 inches) | 240 mm (9.45 inches) x 240 mm (9.45 inches) |
| DN125 (5 inches) | 300 mm (11.81 inches) x 300 mm (11.81 inches) |
| DN150 (6 inches) | 360 mm (14.17 inches) x 360 mm (14.17 inches) |
| DN200 (8 inches) | 420 mm (16.54 inches) x 420 mm (16.54 inches) |
Types of Lug Butterfly Valve
Concentric Lug Butterfly Valve
This type has a disc with the stem placed at the centre, which ensures symmetrical flow characteristics that are ideal for general purpose applications requiring uniform sealing.
Double Offset Lug Butterfly Valve
The positioning of the offset stem slightly off-center from the disc increases its sealing capabilities while lowering friction during operation hence suitable for high pressure and high temperature applications.
Triple Offset Lug Butterfly Valve
This valve has a displaced and inclined stem thus minimizing wear and friction to ensure tighter shut-off and longer service life. It is widely used in demanding industries such as oil & gas, chemical, petrochemical sectors among others.
High Performance Lug Butterfly Valve
These valves are engineered for superior pressure, temperature and sealing performance aspects often having additional advanced attributes like metal seats, fire safe construction and long life.
Resilient-Seated Lug Butterfly Valve
It employs a soft elastomeric seat on it hence provides remarkable sealing performance with minimal torque during operations which is very appropriate for low-pressure or low-temperature uses where tight shut-off isn't crucial.
Metal-Seated Lug Butterfly Valve
These valves have metal seats and can operate in high-pressure and high-temperature environments offering excellent abrasion resistance, corrosion resistance as well as tight shut-off with extended service life.
Bi-Directional Lug Butterfly Valve
Designed to work in both ways of flow these valve types provide flexibility in installation and operation that correspond to situations where flow can be reversed back.
Wafer-Lug Combination Butterfly Valve
These valves combine wafer design features with lug so as to install between flanges or directly onto piping flanges allowing their use across different piping systems based on ease of installation required.
Design And Testing Standards of Lug Type Butterfly Valve
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Design Standard |
BS 5155 / API 609 / AWWA C 504 Standard |
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Inspection & Testing Standard |
BS EN 12266 - I (BS 6755-I) / API 598 / ISO 5208 |
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Flange To Flange Distance |
As Per ANSI B 16.10 / BS 5155 / API 609 |
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End Connection |
Wafer Type To Suit Between Two Flanges |
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ANSI B 16.5, Class 150 / 300 / 600 |
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BS 10 Table D / E / F / H |
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PN 6 / PN 10 / PN 16 / PN 25 / PN 40 / PN 64 |
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DIN Standard / JIS Standard / IS Standard |
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Manufacturing Size Range |
2" (DN50) to 18"(DN 450)1 |
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Pressure Rating of Valve1 |
150# / 300# |
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PN 10 / PN 16 |
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Valve Operation |
Manual Flow Control Lever / Worm-Gear Actuator Operated |
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Pneumatic Quarter Turn Rotary Actuator (Single Acting Spring Return / Double Acting) |
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Motorized Electrical Actuator Operated (Single or Three Phase Power Supply) |
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Valve Seat Leakage |
Leakage Class VI (Zero Leakage) |
Product Packing & Shipping
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