Butterfly valves
Simply, a butterfly valve consists of a circular disc with its pivot axis at right angles to the direction material is flowing. The valve is made up of a body, seat, disc, stem, and actuator.
Properly combining trim features to address material handled and environment is important in selecting the correct model valve for its intended service.
Butterfly Valves are generally specified for most air, gas, steam, and liquid applications. They offer an excellent, economically priced, positive shut-off valve for handling materials (e.g. gases and liquids) that are easily displaced by the valve disc as it closes.
When handling this type of material, butterfly valves provide a reliable, bubble-tight, bi-directional shut off.
What are the primary advantages of using butterfly valves in industrial applications?
Butterfly valves are favored for their lightweight design, compact structure, and cost-effectiveness. They provide excellent flow control with minimal pressure drop, which is crucial for applications involving air, gas, steam, and liquids. Additionally, the design allows for quick opening and closing, making them suitable for systems requiring rapid operation. For instance, the Single-Eccentric Butterfly Valve is designed for a variety of industrial applications, ensuring reliability and efficiency.
How does the eccentric design of butterfly valves improve their performance?
The eccentric design of butterfly valves, such as those found in the Double-Eccentric Butterfly Valve, allows the disc to move off the centerline of the valve body, reducing friction against the seat during operation. This feature minimizes wear and tear, enhances sealing capabilities, and allows for smoother operation. The design also contributes to a more consistent flow pattern and less turbulence in the pipeline.
What factors should be considered when selecting a butterfly valve for a specific application?
When selecting a butterfly valve, important factors include the type of media being handled (liquid, gas, or steam), pressure and temperature conditions, and the valve's construction material. For example, the Butterfly Valve - Carbon Steel Wafer - High-Performance - PTFE Lined is well-suited for applications involving corrosive media due to its PTFE lining, while the Double-eccentric Butterfly Valve - Cast iron, PN10, flanged - 21180 provides robust performance in heavy-duty applications.