Types of butterfly valves

• -Wafer-Type Butterfly Valve
• Designed to fit between two pipe flanges without its own flanges, held in place by bolts.
• Compact and lightweight, commonly used in HVAC, water treatment, and general industrial applications.
• Lug-Type Butterfly Valve
• Features threaded lugs on the valve body, allowing it to be bolted to one flange, enabling removal of one side of the piping without disturbing the other.
• Used in applications requiring easy maintenance, like water distribution and chemical processing.
• Flanged Butterfly Valve
• Has flanges on both ends of the valve body, directly bolted to matching pipe flanges.
• Common in large-diameter pipelines, such as oil and gas or power generation systems.
• Double Offset (High-Performance) Butterfly Valve
• The disc is offset from the centerline of the valve body and the shaft, reducing seat wear and improving sealing.
• Suitable for high-pressure and high-temperature applications, like oil, gas, and chemical industries.
• Triple Offset Butterfly Valve
• Features a third offset where the disc’s sealing surface is angled, ensuring a metal-to-metal seal with zero leakage.
• Used in critical applications like petrochemical, power plants, and cryogenic systems.
• Rubber-Lined Butterfly Valve
• The valve body or disc is lined with rubber or elastomers to prevent corrosion and handle abrasive or corrosive fluids.
• Widely used in chemical processing, mining, and slurry applications.
• Cryogenic Butterfly Valve
• Built to operate in extremely low temperatures, using specialized materials and seals.
• Used in LNG (liquefied natural gas) and other cryogenic applications