What are Butterfly Valves?

Butterfly valves are mechanical devices used to control and regulate the flow of various liquids, slurries, and gases. They operate by utilizing a disc that rotates within a seat and is used to open and shut the valve. The application of butterfly valves mostly includes applications in chemical, food, and pharmaceutical industries.

Types of Butterfly Valves

When selecting a butterfly valve for a project, it is important to understand the different types of butterfly valves available. There are four main types of butterfly valves, including wafer, lug, double offset, and triple offset. Each type of butterfly valve has its own set of characteristics and features.

Wafer Butterfly Valves

Wafer butterfly valves are the most common type of butterfly valves, and are usually used in industrial applications. They are designed to be lightweight and economical, making them an ideal choice for a variety of applications. The main components of the butterfly valve are the body, disc, stem, and seat. The valve is opened and closed using a stem, and the disc telescopes out of the body when the valve is opened.

Lug Butterfly Valves

Lug butterfly valves are similar to wafer valves, with the exception that they require two independent pieces instead of one. The two pieces fit together to form the butterfly valve, and the lug design allows for an easier installation. The main components of the butterfly valve are the body, disc, stem, and seat. The valve is opened and closed using a stem, and the disc telescopes out of the body when the valve is opened.

Double Offset Butterfly Valves

Double offset butterfly valves are designed to reduce the amount of torque required to open and close the valve. These valves are designed to reduce wear and tear on the disc and seat, allowing for a longer life span. The double offset design also eliminates seat and disc hang-up, providing a more reliable operation. The main components of the butterfly valve are the body, disc, stem, and seat. The valve is opened and closed using a stem, and the disc telescopes out of the body when the valve is opened.

Triple Offset Butterfly Valves

Triple offset butterfly valves are the most robust of the main types and are used in the most demanding applications. These valves have three independent pieces that fit together to provide a double-offset and a one-piece construction. The triple offset design allows for a more reliable seal with less wear and tear on the disc and seat. The main components of the butterfly valve are the body, disc, stem, and seat. The valve is opened and closed using a stem, and the disc telescopes out of the body when the valve is opened.

Conclusion

Butterfly valves are a popular choice for many different applications, and they are designed to meet different applications with different designs, features, and features. The four main types of butterfly valves are wafer valves, lug valves, double offset valves, and triple offset valves. Each type of valve provides its own advantages, and can provide reliable and efficient flow regulation in various applications.