A Flow Control Valve is a device used to regulate the flow of liquids or gases in a system. It adjusts the flow rate by changing the size of the passage through which the fluid travels. This helps maintain desired pressure levels and ensures efficient operation in various applications, such as in hydraulic systems and water supply networks. These valves can be manually operated or automatically controlled, depending on the system's requirements. By managing the flow, they contribute to energy efficiency and can prevent damage to equipment. Common types include gate valves, globe valves, and ball valves.