A valve is a mechanical device used to start, stop, regulate, or redirect the flow of liquids, gases, or air within a system. By opening, closing, or partially obstructing a passage, valves control how much fluid flows, where it flows, and at what pressure, making them essential for safe and efficient system operation.

Valves are used across industrial automation, water management, oil and gas, HVAC, chemical processing, and manufacturing systems. They come in many types such as ball valves, gate valves, globe valves, check valves, and control valves, each designed for specific flow characteristics and operating conditions. The right valve ensures precise flow control, system safety, energy efficiency, and long-term reliability.