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Butterfly valves are widely used in various industries and applications due to their versatility, efficiency, and reliability. These valves are known for their simple yet effective design, which allows for quick and easy control of fluid flow. Butterfly valves consist of a disc that rotates on a shaft to open or close the valve. When the valve is open, the disc is parallel to the flow, allowing for a straight-through path for the fluid. On the other hand, when the valve is closed, the disc is perpendicular to the flow, blocking the fluid flow. One of the key advantages of butterfly valves is their quick operation and high-flow capacity. Unlike traditional gate or globe valves, butterfly valves can be quickly opened or closed with just a quarter turn of the handle or actuator. This fast operation is especially useful in applications where rapid flow control is required. Additionally, butterfly valves have a streamlined flow path, which minimizes pressure drop and turbulence, resulting in efficient fluid flow. Butterfly valves come in various designs to suit different applications and requirements. The two main types of butterfly valves are the concentric and eccentric models. Concentric butterfly valves have a symmetric disc that centers within the body, providing a bubble-tight seal in both directions.