These flow control devices are characterized by a rotating plug with strategically placed ports to direct fluid flow through one of three pathways. They offer a compact and efficient method for diverting, mixing, or selecting between different fluid streams within a piping system. For instance, one port might connect to a supply line, while the other two lead to separate destinations; rotating the plug determines which destination receives the fluid.
Their significance lies in their ability to simplify complex piping arrangements, reduce the number of required components, and minimize potential leak points. Historically, these devices provided a manual alternative to automated valve systems. Today, they are utilized across various industries, including chemical processing, pharmaceuticals, and oil and gas, due to their reliable performance and ease of operation. Their benefits include space savings, cost-effectiveness, and simplified maintenance procedures.