A ball valve is a type of quarter-turn valve that uses a hollow, perforated, and pivoting ball to control the flow of fluid. When the valve is open, the ball’s hole aligns with the pipeline, allowing fluid to pass through. Conversely, when the valve is closed, the ball rotates 90 degrees to block the flow. Ball valves are commonly used in industrial applications due to their reliability, ease of operation, and ability to provide tight shutoff. They are widely employed in industries such as oil and gas, water treatment, chemical processing, and HVAC systems.