Butterfly Valve Types: Wafer, Double Flanged, Manual & Motorized Guide
Butterfly valves are commonly used as flow-control devices in industrial piping systems due to features like compact construction, quick operation, and cost-effective performance in large pipe diameters. They are generally applied across water treatment, power generation, chemical processing, utilities, and food industries. Butterfly valves offer reliable throttling and isolation solutions for a wide range of fluids and gases. This article will describe butterfly valves, their working types, solutions offered by Cair Euromatic Automation, and more.
What Is A Butterfly Valve?
A butterfly valve is a quarter-turn rotary valve. It is used for regulating or isolating fluid flow. Its structure is the combination of a circular metal disc mounted on a shaft, positioned at the center of the pipe. The butterfly valve’s disc rotates parallel to the flow; the valve opens. When turned perpendicular, it completely shuts off the flow. Butterfly valves are ideal for large-diameter pipelines as they are lightweight and operate faster than traditional gate or globe valves while requiring less installation space.
Automated Butterfly Valve: Working Principle
An actuator is a mechanical device that converts electric power into motion. In an automated butterfly valve, the actuator rotates the valve shaft to open or close the disc. It enables precise flow control due to its rotary movement of 90 degrees or less. They don’t have internal cavities and avoid fluid entrapment when closed, which makes them ideal for hygienic, chemical, and continuous-flow applications.
Manual vs. Automated Butterfly Valves
Manual Butterfly Valves
Manual butterfly valves are suitable for various valve sizes and applications where frequent operations or automation are not required. They are operated using hand levels or worm gearboxes, which make them cost-effective and simple in construction.
Automated Butterfly Valves
Automated butterfly valves are commonly used in process plants, utilities, and water treatment systems where accuracy, repeatability, and integration with control systems are important. They are primarily designed for automated or remote operations and can be fitted with electric actuators.
Butterfly Valve with Electric Actuator
A butterfly valve with an electric actuator is ideal where accurate positioning and remote operations are required. It uses an electric motor to control valve movement, which allows easy integration with PLC and SCADA systems, resulting in less manual intervention and improved efficiency. At Cair Euromatic Automation, we provide electric actuated butterfly valves designed for smooth operations, long service life, and reliability.
Types of Butterfly Valves
Butterfly valves come in different designs to cater for operations in varying pressure, temperature, and conditions.
Concentric Butterfly Valve
These valves are suited for low-pressure and low-temperature applications. Here, disc and stem are centrally aligned, and valves are typically elastomer-seated.
Double Eccentric Butterfly Valve
The double eccentric butterfly valve contains two offsets in the shaft and disc alignment, mitigating friction between the disc and seat during operation. This design boosts sealing performance, lowers operating torque, and reduces wear, which makes it ideal for medium to high-pressure applications.
Triple Eccentric Butterfly Valve
They are designed for extreme pressure and temperature conditions. The triple eccentric butterfly valve uses a metal-to-metal sealing system. It is generally used in oil & gas, power, and chemical industries.
Wafer vs. Double Flanged Butterfly Valve
Wafer Butterfly Valve
Wafer butterfly valve’s design is compact and lightweight, and they are suitable for space-constrained installations and low to medium pressure systems. They are installed between two pipeline flanges using bolts.
Double Flanged Butterfly Valve
Double flanged butterfly valves are bolted directly to the pipeline; they have flanged on both ends and provide higher mechanical strength and are ideal for high-pressure and large-diameter pipelines in water distribution and industrial systems.
AWWA Large Diameter Double Flanged Butterfly Valve
Large-diameter butterfly valves are manufactured by following the standards set by the American Water Works Association. They are commonly used in municipal water supply and wastewater projects. AWWA large diameter double flanged butterfly valves are ideal for pumping stations, treatment plants, and water transmission pipelines due to their robust construction, long service life, and reliable sealing.
Rubber Lined Double Flanged Butterfly Valve
The rubber-lined double flanged butterfly valve features one internal elastomer lining, such as EPDM, NBR, or Neoprene. It enhances corrosion resistance and provides tight shut-off performance. Rubber-lined double flanged butterfly valves are generally used in chemical processing, slurry handling, effluent treatment plants, and more.
Butterfly Valve Manufacturer in India
India is a manufacturing hub for industrial valves, fulfilling both domestic and global market demands. A reliable butterfly valve manufacturer in India offers an extensive range of valve designs, pressure classes, auction options, and products manufactured following international standards such as API, IS, BS, and AWWA.
Cair Euromatic Automation is a premier valve manufacturer in India. We have a wide variety of butterfly valves, which include manual and actuated, water and double flanged designs, and other options suitable for multiple industrial applications. Quality manufacturing, precise engineering, and automation-ready solutions are amongst our top priorities.
Conclusion
Butterfly valves are widely used as flow-control devices across multiple-industrial sectors. For enhancing system performance and durability, selecting the right valve design is critical. At Cair Euromatic Automation, we offer a wide range of butterfly solutions, from manual to automated, wafer, to double flanged configurations. Our products are manufactured following international standards to provide the best value and reliable solution to users.