Butterfly Valve is a type of quarter-turn valve that is commonly used in various industries for regulating or isolating the flow of liquids or gases. It gets its name from the disk or "butterfly" that controls the flow by rotating a quarter turn within the valve body. When the disk is parallel to the flow, the valve is fully open, allowing unrestricted flow, and when perpendicular, it is closed, blocking the flow completely. Butterfly Valve is known for its simple and compact design, lightweight construction, and ease of operation. They are widely used due to their cost-effectiveness, quick operation, and reliable performance in a variety of applications.