Valves are essential mechanical devices used to control the flow and pressure of liquids, gases, and slurries within a system or process. By opening, closing, or partially obstructing passageways, valves regulate the movement of media in pipelines and machinery across a wide range of industries, including oil and gas, water treatment, chemical processing, power generation, HVAC, and manufacturing.

Valves come in many types—such as gate valves, globe valves, ball valves, butterfly valves, check valves, and control valves—each designed for specific functions like on/off control, flow regulation, backflow prevention, and pressure control. They are manufactured in various materials (e.g., carbon steel, stainless steel, brass, and plastic) to withstand different pressures, temperatures, and chemical environments.