They are popular in various industries due to their simple design, reliability, and ease of operation. In this article, we'll explore the functionality, applications, and advantages of butterfly valves, as well as their different types and materials.
Understanding Butterfly Valves
Butterfly valves consist of a circular disc or vane that rotates on a shaft to control the flow of fluid. When the valve is fully open, the disc is parallel to the flow, allowing for unrestricted flow. When the valve is closed, the disc is perpendicular to the flow, blocking the flow completely. Butterfly valves are often used in applications where fast and efficient shut-off is required.
Types of Butterfly Valves
Wafer Style: Wafer-style butterfly valves are designed to fit between two flanges Butterfly valve using bolts or studs. They are lightweight and easy to install, making them ideal for applications where space is limited.
Lug Style: Lug-style butterfly valves have threaded inserts or lugs on the valve body. These lugs allow the valve to be installed between flanges without the need for bolts or studs, making them easier to install and remove.
Double Offset: Double-offset butterfly valves have a disc that is offset from the centerline of the valve body. This design reduces friction between the disc and the seat, allowing for smoother operation and longer service life.
Triple Offset: Triple-offset butterfly valves have a disc that is offset from the centerline of the valve body in three different directions. This design provides a bubble-tight seal even under high pressures and temperatures, making them ideal for critical applications.
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