A ball valve is a quarter-turn valve designed to provide reliable and efficient control of liquid or gas flow. It uses a rotating ball with a central opening to quickly start or stop the flow, offering smooth operation and excellent sealing performance. Ball valves are available in various sizes, materials, pressure ratings, and connection types to suit different system requirements. They are widely used in water supply, oil and gas, chemical processing, industrial equipment, HVAC systems, and other fluid handling applications.