Butterfly Valves are a type of quarter-turn valve commonly used to regulate or isolate the flow of liquids or gases in various industrial applications. They are called "butterfly" valves due to their disc-shaped closure element, which resembles the wings of a butterfly. When the valve is in the fully open position, the disc is rotated perpendicular to the flow direction, allowing unrestricted flow. Butterfly Valves offer several advantages such as compact and lightweight design, easy installation and maintenance, quick quarter-turn operation for fast open/close action, cost-effective compared to some other valve types and so on.