Lug Type Butterfly Valve

As an established ductile iron butterfly valve manufacturer with over 18 years of production expertise, we combine advanced casting technology with precision machining to produce lug type butterfly valves that excel in dead-end service, bi-directional sealing, and long-term durability. Our comprehensive range spans 2" to 24" (DN50-DN600) with pressure ratings from PN10 to PN25, supported by multiple material configurations to match your specific media and operating conditions.

1. Standards & Flange Drilling

• Standards: EN 593 / ISO 5752 / BS 5155 / AWWA C504

• Flange Drilling: DIN 2501 / BS 4504 / ANSI B16.1

2. Pressure Ratings

• Working Pressure: 10 bar / 16 bar / 25 bar

• Shell Test Pressure: 15 bar / 24 bar / 37.5 bar

• Seal Test Pressure: 11 bar / 17.6 bar / 27.5 bar

  
  

3. Materials

• Body: Ductile Iron (DI) / Cast Iron (CI) / Carbon Steel / Stainless Steel

• Disc: Ductile Iron (DI) / Stainless Steel 304 / Stainless Steel 316 / Aluminum Bronze

• Shaft: Stainless Steel 410 / 416 / 420

• Seat: EPDM / NBR

• Coating: Fusion‑bonded epoxy, internal & external ≥ 250 μm

  
  

4. Key Features

1. Lug‑type design allows installation between two flanges or as a dead‑end service valve.

2. Bubble‑tight shut‑off with elastic seat material ensures low operating torque and zero leakage.

3. Multiple material options suit water, wastewater, sea water, acids, alkalis, and most industrial media.

4. ISO 5211 mounting pad for direct installation of pneumatic, electric, or manual actuators.

5. Easy maintenance—replaceable seat and modular design minimize downtime.

   
   

5. Typical Applications

• Municipal water and wastewater

• HVAC systems

• General industrial piping

• Chemical processing

• Desalination plants

• Power generation

• Pulp & paper

• Mining operations

  
  

6. Technical Data Summary

Understanding Lug Type Butterfly Valve Design

Lug type butterfly valve, as an indispensable fluid control equipment in industrial pipeline systems, plays a key role in many fields with its unique structural design and excellent performance.

Structurally speaking, the lug type butterfly valve adopts a clamp design, with protruding ears on both sides of the valve body. The valve is clamped between the pipeline flanges with bolts, making installation simple and space saving. The butterfly plate, as the core component, rotates around the axis of the valve stem to achieve the opening and closing of the valve. This design makes the valve move quickly and operate conveniently during the opening and closing process.

In terms of performance, the clamp type butterfly valve performs well. It has good sealing performance and uses elastic sealing materials such as rubber to achieve zero leakage under various working conditions, effectively ensuring the safety and stability of fluid transportation. At the same time, the valve has a small operating torque, making it easy to adapt to various driving modes such as manual, electric, and pneumatic, meeting control requirements in different scenarios. In addition, the valve has a compact structure and light weight, reducing transportation and installation costs.

In the application field, the clamp type butterfly valve is widely used. In the water supply and drainage system, it is used to control the flow of water and regulate the flow rate. In HVAC systems, the flow of air and water can be adjusted to achieve precise control of temperature and humidity. In the fields of chemical, petroleum, power and other industries, the clamp type butterfly valve can adapt to complex working conditions such as corrosion, high temperature and high pressure, ensuring the safe transportation of media and the smooth progress of process flow.

In short, the lug type butterfly valve has become an ideal choice for pipeline fluid control due to its exquisite structure, reliable performance, and flexible application, providing strong guarantees for efficient and stable operation in various industries.

Why Choose Midas Lug Butterfly Valves?

Shanxi Midas Industrial Co., Ltd. is a leading lug type butterfly valve manufacturer specializing in high-performance ductile iron butterfly valves for municipal water systems, industrial process control, and HVAC applications. Our lug butterfly valves are engineered to international standards including EN593, ISO 5752, BS 5155, and API 609, delivering exceptional reliability and versatility for demanding flow control applications worldwide.

Complete Material & Pressure Range.From 2" to 24" sizes in ductile iron, carbon steel, and stainless steel bodies with pressure ratings from PN6 to PN25, we offer one of the industry's most comprehensive lug butterfly valve product lines. This range enables single-source procurement for complete project requirements

Competitive Factory-Direct Pricing.As a direct manufacturer, we eliminate distributor markups while maintaining premium quality standards. Our pricing structure provides 20-35% cost savings compared to western brands without compromising material quality or performance specifications—delivering exceptional value for municipal projects, industrial facilities, and OEM applications.

Global Quality Certifications.Midas lug butterfly valves meet international quality and safety standards.

Request a Quote

Ready to specify Midas lug type butterfly valves for your next project? Our technical sales team is available to discuss your requirements, provide customized recommendations, and deliver competitive quotations for projects of any scale—from single replacement valves to complete municipal water system installations.Contact us.