Lug Type Butterfly Valve

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

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.