Lug Type Butterfly Valve

Lug butterfly valve has simple structure, small volume, light weight, and has good fluid control characteristics. Its disc is installed in the diameter direction of pipeline, so the valve can be quickly opened and closed by rotating its disc 90 degrees.

The wafer body is easy to be connected between two pipeline flange with flange bolts, and it can be used at end in a fluid system,when installed with the seat retainer plate on the pressure side(API 609)

Lug butterfly valves designed to comply with MSS SP-67, BS5155 and API 609. Compatible with GB, ANSI, DIN, BS, JIS flanges. Available in size 1½″ to 48″.  Available with handles (1½″ to 12″), manual gear operators (1½″ to 48″), and electric or pneumatic actuators (1½″ to 48″). With many body/trim combinations, Lug butterfly valve can meet your application.

Lug Type Butterfly Valve Dimensions

What’s the Difference: Lug vs Wafer?

Choosing between a lug type butterfly valve and a wafer type butterfly valve often depends on your pipeline’s design, maintenance requirements, and pressure conditions. Though both serve the same fundamental function—to regulate, start, or stop fluid flow—their structural differences can significantly impact long-term usability and system flexibility.

The lug butterfly valve features threaded inserts (lugs) on both sides of its body. These lugs allow the valve to be securely bolted between two pipe flanges without the need for nuts. One major benefit of this configuration is that you can disconnect one side of the pipeline without affecting the other, which makes it especially suitable for end-of-line service or dead-end applications. In contrast, wafer-type butterfly valves are designed to be clamped between two flanges using long bolts that span the valve body. Wafer types typically require both sides of the system to remain connected, making isolation or partial disassembly more difficult.

As a top supplier of inflow control solutions, Ningjin Thriveon has helped clients from the U.S., Italy, South Africa, and the Middle East make informed valve selection decisions. Our lug style butterfly valve products are frequently recommended for systems that require sectioned control, frequent maintenance, or are exposed to higher pressures.

Another important factor is pressure handling. Lug type valves are generally stronger and can be used in moderate to high-pressure systems without compromising on stability. They also offer better alignment between pipelines, reducing leakage risk. Wafer valves, while cost-effective and lightweight, are more suitable for low-pressure, non-critical systems.

Understanding the difference between lug and wafer type butterfly valve can save you both operational costs and unexpected downtime. For projects that demand robust performance, modular maintenance, and durability, lug type butterfly valves are a sound choice. At Ningjin Thriveon, our technical team is always ready to offer one-on-one guidance to help you choose the ideal configuration based on your system’s exact needs.

Lug Type Butterfly Valve Installation Guide

Installing a lug type butterfly valve requires care, precision, and a clear understanding of both the valve’s design and the pipeline system it integrates into. Unlike wafer types, which are simply clamped between flanges, lugged butterfly valve installation involves bolting each side of the valve independently to its mating flanges. This feature provides stronger support and allows for future section isolation.

At Ningjin Thriveon, we not only high-quality lug butterfly valve manufacturer but also provide full technical assistance for global clients seeking to streamline their installation process. Here's a step-by-step overview of a standard lug valve installation:

1. Inspect the valve and pipeline: Before installation, ensure that the flange faces are clean and free of debris, and verify that the valve disc is in the slightly open position to avoid damage during alignment.

2. Align the valve with the pipe flanges: Use appropriate gaskets and ensure that the bolt holes line up precisely with the lugs on the valve body.

3. Insert bolts and tighten gradually: Begin with finger-tight bolts, then tighten in a cross or star pattern to avoid distortion. Torque each bolt in stages according to the recommended specifications.

4. Actuate the valve: Once fully installed, manually rotate the handle or gear to ensure smooth operation. Confirm that there is no friction or obstruction in the disc movement.

5 . Conduct pressure testing: After installation, perform hydrostatic or air testing to verify there are no leaks at the joint connections.

Our engineers, with more than ten years of hands-on experience, are available to provide installation training and remote guidance. Whether you're working with a fully lugged butterfly valve for a high-pressure application or a semi-lugged butterfly valve for HVAC systems, Ningjin Thriveon ensures each unit is shipped with complete instructions and technical documentation.

With proper installation, a lug-type butterfly valve offers excellent sealing performance, long service life, and low maintenance costs. This makes it a preferred choice for critical systems in industries such as water treatment, petrochemicals, and energy. Trust Ningjin Thriveon not only as your valve supplier but as your long-term technical partner.

Lug Type Butterfly Valve Catalogue

Finding the right valve for your system doesn’t need to be time-consuming. Our comprehensive lug type butterfly valve catalogue is designed to simplify your selection process by offering in-depth technical data, application guidelines, and visuals—all in one resource.

Within our catalogue, you’ll find detailed specifications for each model, including pressure ratings, disc and seat materials, body configurations, and available actuation options (manual, pneumatic, and electric). From butterfly valve full lug type to lug wafer butterfly valve variants, our catalogue provides dimensional drawings, installation guides, and selection criteria based on fluid type and operating conditions.

Ningjin Thriveon has developed this catalogue based on years of industry experience, exporting premium valves to demanding markets like the United States, Saudi Arabia, and Italy. Our customers value the precision and clarity offered in our materials, which support engineers in confidently specifying the right components for their projects.

What you can expect:

1. Product sizes: DN50–DN1200

2.Standards: ANSI, DIN, BS, JIS

3. Operating pressure: PN10–PN25

4. Flow media compatibility: water, oil, gas, chemical fluids

5. Detailed lug-type butterfly valve dimensions and bolt charts

6. Valve comparisons (e.g., butterfly lug type vs wafer)

In addition, our catalogue includes maintenance instructions and field application photos for reference. Each product page includes ordering codes and customization options, enabling rapid procurement and technical matching. For large-scale or OEM buyers, our team offers tailored solutions and flexible packaging.

Whether you're designing a new system or upgrading an old one, our lug type butterfly valve catalogue is your go-to guide for efficiency, safety, and performance. Request your copy today and experience the attention to detail and professionalism that make Ningjin Thriveon a trusted name in valve manufacturing.