Lug-type butterfly valves, a commonly used valve type, possess several notable features that have led to their widespread use in industrial piping systems. The following is a detailed summary of their features:
01
Structural Features
Flange Connection
Lug-type butterfly valves connect to the pipeline via flanges. This connection method provides a more stable connection between the valve and the pipeline, making them suitable for medium- to large-scale pipeline systems. Flange connections also facilitate valve installation and removal, improving maintenance convenience.
Lug Design
Lug-type butterfly valves typically have two lug designs: one with a through hole (commonly known as Type A in China) and one with an internal thread within the through hole (Type LT in China). These two designs are suitable for different installation scenarios, providing more installation options.
Double Eccentric Structure (Select Models)

Some lug-type butterfly valves utilize a double eccentric design. This design reduces friction and torque during opening and closing, thereby improving valve response speed and service life.

02
Performance Features
01
Excellent Sealing
Lugged butterfly valves typically utilize a sealing gasket to ensure sealing. Some models also feature a triple-seal structure (two seals and one metal seal), ensuring excellent sealing performance under high temperatures, high pressures, and corrosive media.
02
Quick Opening and Closing
Lugged butterfly valves offer rapid opening and closing, enabling quick on/off control of media flow and improving the operational efficiency of pipeline systems.
03
High Corrosion Resistance
A variety of valve body and disc materials, including stainless steel (SS304, SS316, SS304L, SS316L, etc.), provide lug butterfly valves with excellent corrosion resistance and compatibility with a wide range of media environments.
04
Easy Operation
Lugged butterfly valves are easy to operate and control. Some models are equipped with a reliable operating handle and electric actuator, ensuring precise control and convenient remote operation.
03
Applications
Due to their excellent performance characteristics, lug-type butterfly valves are widely used in the petroleum, chemical, smelting, papermaking, and environmental protection industries. In these fields, lug-type butterfly valves play an important role in connecting, shutting off, and regulating media pressure and flow.
04
Other Features
01
Novel and Rational Design
The lug-type butterfly valve features a novel and rational design, a compact structure, and lightweight, making it easy to transport and install.
02
Replaceable Seals
The lug-type butterfly valve's seals are replaceable, ensuring the valve's sealing performance over long-term use.
03
Linear Flow Characteristics
The lug-type butterfly valve's linear flow characteristics provide greater precision and stability when regulating media flow.