A Single-Seated Control Valve, also known as a single-port control valve or globe valve, is used to regulate the flow rate of a fluid in a piping system. It consists of a valve body, a plug or disc, a seat, and an actuator. The design allows for precise control of fluid flow by adjusting the position of the plug or disc relative to the seat. This enables accurate modulation of flow rates, making single-seated control valves ideal for applications requiring precise flow control.