What is a Butterfly Valve1?

A butterfly valve is a quarter-turn rotary valve that is used to regulate flow in a pipeline. It has a circular disc shaped closure mechanism, which is mounted in the center of a pipe. This valve is designed so that a single quarter turn is all that is required to open or close it. As the disc turns within the valve body, the valve opens and closes, similar to the way a butterfly flaps its wings.

Why Are Butterfly Valves Used?

Butterfly valves are typically used to shut off or regulate flow in a pressurized system. The butterfly valve’s design makes it particularly useful when space is limited, since its disc only requires a quarter turn to regulate flow. In addition, its light weight and low torque make it easy to open and close. They are also cost effective and durable, making them a popular choice for many applications.

How Does a Butterfly Valve Work?

The butterfly valve works by having a disc-shaped closure fitted with a stem attached to it at the center of the valve. As the stem turns, the disk turns within the valve body, opening and closing the valve. The sealing between the disc and the valve body is done with elastomers, which ensure a tight seal when the valve is closed.

Types of Butterfly Valves

Butterfly valves come in many different types. These include wafer, lug, and flanged versions. Wafer butterfly valves are designed for simple installation and are often used for low-pressure applications. Lug butterfly valves are designed for heavier installation and are often used for higher pressure applications. Flanged butterfly valves are designed for permanent installation and can be used for a variety of applications.

Applications of Butterfly Valves

Butterfly valves are a popular choice for many applications due to their cost effectiveness, durability, and space saving design. They have a wide range of applications, from water and wastewater treatment to HVAC systems, and are easy to open and close due to their low torque design. If you are looking for a valve or regulator to control or shut off flow in a pressurized system, a butterfly valve may be the perfect option for you.