The 3D design of a pipe with a butterfly valve showcases a streamlined flow control system, featuring a straight pipe section integrated with a centrally mounted butterfly valve. The valve includes a rotating disc that regulates flow by turning perpendicular or parallel to the direction of fluid. Typically flanged or wafer-type, the butterfly valve is compact, lightweight, and ideal for quick shutoff in large-diameter piping systems. This assembly is widely used in water treatment, HVAC, and industrial fluid control, offering efficient operation, easy maintenance, and reliable sealing.