🔵 Lug-type Eccentric Butterfly Valve

Lug-type design · Eccentric configuration · Low opening/closing torque · Reliable sealing · Suitable for water treatment and large-diameter pipelines

A lug-type eccentric butterfly valve is a type of valve that combines… Lug-type valve body structure and eccentric butterfly disc design Butterfly valves are primarily used for opening and closing pipeline media, as well as for flow control according to operating conditions.

Independent lug mounting holes are provided on both sides of the valve body, allowing the valve to be securely fastened between pipeline flanges using bolts. The eccentric design reduces friction between the butterfly disc and the valve seat during opening and closing, thereby lowering operating torque and minimizing wear on the sealing surfaces.

🏭 38 years of valve manufacturing experience | Specializing in water treatment | Professional manufacturer of eccentric butterfly valves

⚙️ Core Product Advantages

🔹 Lug-type design | More flexible installation

The valve body features an independent lug design, with each mounting hole forming a separate connection point to the valve body, making it ideal for piping systems that require secure fixation and convenient disassembly.

🔹 Eccentric Structure | Reduces Sealing Friction

The butterfly‑plate axis is designed with an eccentric configuration, which reduces friction between the disc and the seat during opening and closing, thereby lowering operating torque and extending the service life of the seals.

🔹 Reliable sealing performance

The eccentric structure, combined with a well‑designed valve seat, ensures reliable sealing during closure, making this valve ideally suited for water‑treatment systems that demand high pipeline shut‑off performance.

🔹 Compact design | Saves installation space

Compared with certain traditional valves, butterfly valves feature a compact structure and relatively light weight, making them well suited for large-diameter piping systems where space is limited.

🔹 Easy to maintain and replace

The lug-type design provides an independent bolted connection, making equipment maintenance and pipeline disassembly and reassembly more convenient.

💧 Applicable Media

Lug-type eccentric butterfly valves are primarily suitable for:

✓ Clear water
✓ Raw water
✓ Wastewater
✓ Recirculating water
✓ Industrial water use
✓ River water
✓ Reservoir water conveyance
✓ Common liquid media

For media containing silt, particulates, or exhibiting a certain degree of abrasiveness, the valve body, butterfly disc, seat, and sealing materials may be selected according to the actual operating conditions.

🏗️ Typical Application Areas

🚰 Urban water supply system
Used for main water supply lines, regional water supply, and water transmission networks.

💧 Water treatment plant
Suitable for raw water, treated water, and water treatment systems.

♻️ Wastewater Treatment Project
Used for sewage conveyance and related process pipelines.

🏭 Industrial Water System
Suitable for circulating water, cooling water, and industrial process water pipelines.

🚧 Pumping station system
It can be used for isolating inlet and outlet pipelines and equipment at pump stations.

🌊 Water conservancy project
Suitable for reservoirs, water diversion projects, and large-scale water conveyance systems.

🔩 What is a lug-type butterfly valve?

Lug-type butterfly valves differ from conventional wafer-type butterfly valves in their installation configuration.

Lug-type butterfly valve:

🔩 The valve body features independent bolt‑on mounting lugs on both sides.
🔩 Can be connected to the flanges of pipes on both sides via bolts.
🔩 Valves can be securely mounted independently within the piping system.
🔩 Suitable for applications requiring single-side disassembly or end‑mount installation.

Therefore, for those who need to consider Independent fixing, maintenance, and disassembly/reassembly of valves and piping For such projects, lug-type butterfly valves are a common choice.

⚙️ Why choose an eccentric structure?

In a conventional concentric butterfly valve, the disc continuously rubs against the sealing surfaces during opening and closing.

Eccentric butterfly valves, by offsetting the axis of the valve stem relative to the center of the butterfly disc, enable the disc to disengage from the sealing surface more rapidly during both opening and closing.

This is possible:

✓ Reduce friction on the sealing surface
✓ Reduces operating torque
✓ Reduces seal wear
✓ Enhances opening and closing stability
✓ Extend valve service life

For Large-diameter water treatment pipelines that are frequently operated or in long-term service , eccentric structures have considerable practical value.

🛠️ Multiple operation modes

According to the project’s automated control requirements, the following can be configured:

🔧 Manual operation
Suitable for general water supply and water treatment pipelines.

⚡ Electric operation
Suitable for remote control, automation systems, and applications requiring frequent operation.

💨 Pneumatic operation
Suitable for systems requiring rapid on/off operation and centralized control.

🔄 Other implementing agencies
It can be configured according to the customer’s control system, installation space, and operational requirements.

📋 Engineering parameters are customizable.

We can provide suitable lug‑type eccentric butterfly valves tailored to the project’s operating conditions.

• Nominal diameter: According to project requirements
• Nominal pressure: PN/Class optional
• Valve body material: Selected according to the process fluid and pressure.
• Butterfly valve material: Selected based on the medium and operating conditions.
• Valve stem material: Select based on the medium and service conditions.
• Valve seat material: EPDM, NBR, PTFE, etc., selectable according to operating conditions.
• Connection type: Lug type
• Operating mode: manual / electric / pneumatic
• Anti-corrosion coating: Can be customized according to project requirements.
• Available upon request: CAD drawings, technical documentation, material certificates, and inspection reports.

🏭 38-year-old water treatment valve manufacturer

Zhengzhou Zhongnan Valve Co., Ltd. has been engaged in valve manufacturing and R&D since 1988.

For the past 38 years, we have remained steadfastly focused on Water treatment, large-diameter water transmission, and eccentric valves 。

The main products include:

🔵 Double-eccentric butterfly valve
🔵 Triple-eccentric butterfly valve
🔵 Lug Eccentric Butterfly Valve
🔵 Eccentric Hemisphere Valve
🔵 Rotary ball valve
🔵 Flow and pressure regulating valve
🔵 Hydraulic Check Valve
🔵 Seawater butterfly valve

We not only offer standard products, but can also customize solutions based on our customers’… Caliber, pressure, medium, flow rate, temperature, connection standard, and control method Perform valve configuration.

📩 Looking to purchase lug-type eccentric butterfly valves?

If your project involves:

Water Treatment Plant | Wastewater Treatment | Urban Water Supply | Pumping Station | Hydraulic Engineering | Industrial Circulating Water | Large-Diameter Water Conveyance

Welcome to send:

DN + PN/Class + Medium + Temperature + Connection Standard + Operating Mode + Quantity

We can help you determine the appropriate option based on your actual operating conditions. Eccentric structure, material, sealing scheme, and actuator 。

👉 Please send us your project specifications, and our 1938 water‑treatment valve manufacturer will help you select the appropriate eccentric butterfly valve solution.