The Lug Type Butterfly Valve is a high-performance flow control solution engineered for precision, durability, and versatility. Featuring a compact structure and lightweight design, this valve utilizes a disc installed in the pipeline's diameter direction, allowing for rapid 90-degree opening and closing. Designed to comply with rigorous international standards including API 609, MSS SP-67, and BS5155, it ensures seamless integration with GB, ANSI, DIN, BS, and JIS flanges.

Specifically engineered for critical industrial applications, the lug style design features threaded inserts that allow the valve to be bolted independently to the pipeline flanges. This unique configuration enables "dead-end" service, meaning one side of the pipeline can be disconnected for maintenance without disrupting the entire system. From water treatment to petrochemicals, these valves provide a robust seal and exceptional stability even in moderate to high-pressure environments.

Detailed Parameters

Available Sizes	1½″ to 48″ (DN50–DN1200)	Standard Compliance	API 609, MSS SP-67, BS5155
Body Materials	Cast Iron, Ductile Iron, Stainless Steel, Carbon Steel	Stem Materials	Stainless Steel (316, 410, 420, 416), Zinc Plated Steel
Seat Options	NBR, EPDM, Neoprene, PTFE, Viton	Disc Materials	Ductile Iron (Ni-plated), Stainless Steel, Al-Bronze
Operating Pressure	PN10 to PN25	Actuation Methods	Handle, Manual Gear, Electric or Pneumatic Actuators
Flange Compatibility	ANSI, DIN, BS, JIS, GB	Media Compatibility	Water, Oil, Gas, Chemical Fluids

Key Advantages

Robust Durability

Constructed from premium alloys and stainless steel to resist corrosion and wear in harsh industrial environments.

Fast Operation

The 90-degree rotating disc mechanism ensures rapid flow start/stop, improving system response time.

Modular Maintenance

Lugged design allows for single-sided pipeline disconnection, significantly reducing downtime during repairs.

Flexible Actuation

Available in manual, gear-operated, pneumatic, and electric configurations to suit any automation level.

Precision Sealing

Multiple seat materials (PTFE, Viton, etc.) ensure a leak-proof seal across various chemical media.

Universal Fit

Fully compatible with global flange standards, making it an ideal choice for international projects.

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Management Platforms

Material Sourcing

Strict selection of ASTM A351, A216, and A536 materials for maximum reliability.

Precision Machining

Advanced CNC processing ensures tight tolerances and perfect alignment of lugs and discs.

Quality Testing

Every valve undergoes hydrostatic and air pressure testing to guarantee zero leakage.

Design Engineering

Technical team providing 1-on-1 guidance for custom configurations and system integration.

Global Logistics

Experienced export operations serving the U.S., Italy, Saudi Arabia, and South Africa.

Technical Support

Comprehensive installation guides and remote training for global field engineers.

Investment Return Comparison

Feature	Lug Type Valve	Wafer Type Valve
Installation	Independent Bolting	Clamped Between Flanges
Pipeline Isolation	High (Dead-end capable)	Low (Both sides required)
Pressure Stability	Superior / High Pressure	Moderate / Low Pressure
Maintenance Ease	High (Easy partial disassembly)	Moderate (Full disassembly)
Long-term Value	Reduced Downtime Costs	Lower Initial Cost

Frequently Asked Questions

Q: What is the primary difference between Lug and Wafer butterfly valves?

Lug valves have threaded inserts that allow them to be bolted to the pipe independently, enabling dead-end service. Wafer valves are clamped between two flanges using long bolts, requiring both sides to remain connected.

Q: Which materials are best for corrosive chemical fluids?

For corrosive environments, we recommend Stainless Steel (CF8M or CF3M) for the body and disc, paired with PTFE or Viton seats for maximum chemical resistance.

Q: Can Lug Type Butterfly Valves be automated?

Yes, our lug butterfly valves are available with manual handles, gear operators, and fully automated pneumatic or electric actuators for sizes ranging from 1½″ to 48″.

Q: What international flange standards are supported?

Our valves are designed for universal compatibility and support ANSI, DIN, BS, JIS, and GB flange standards.

Q: How do I ensure a leak-free installation?

Ensure flange faces are clean, use appropriate gaskets, and tighten bolts in a star or cross pattern in stages to avoid distortion of the valve seat.

Q: What is the maximum size available for Lug Type Butterfly Valves?

We provide a wide range of sizes from 1½″ up to 48″ (DN50 to DN1200) to accommodate various industrial pipeline requirements.