Flow control devices are tools used to manage the movement of fluids, such as water or air, in various systems. They help regulate the flow rate, pressure, and direction of the fluid, ensuring efficient operation in applications like plumbing, HVAC systems, and industrial processes. Common types include valves, gates, and pumps. These devices play a crucial role in maintaining safety and efficiency. For instance, valves can stop or allow fluid flow, while pumps can increase pressure to move fluids through a system. Proper use of flow control devices helps prevent leaks, reduces energy consumption, and enhances overall system performance.