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Double Eccentric Butterfly Valve
A double eccentric butterfly valve               is a type of valve used to control the flow of a fluid in a pipeline. It consists of a circular disc with a shaft running through the center of the disc. The disc is positioned perpendicular to the pipeline and rotates around the shaft to regulate the flow of the fluid.     
 
The double eccentric design of this valve means that the disc is offset from the centerline of the pipeline, and the shaft is also offset from the centerline of the disc. This configuration allows the disc to move away from the seat without rubbing against it, which reduces wear and tear on the valve and improves its sealing capabilities.     
 
Double eccentric butterfly valves are commonly used in applications where tight shut-off is required, such as in the oil and gas industry, water treatment, and power generation. They are also used in HVAC systems and other applications where precise flow control is necessary.     
 
What is double eccentric butterfly valve?
Double eccentric butterfly valves                are most often used in water supply applications below ground as an alternative to gate valves. When installing butterfly valves below ground a lower bury depth is required and typically, they are more cost-effective, especially in the large dimensions, compared to gate valves.     

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