A control ball valve is a type of valve used to regulate the flow of a fluid or gas. It is a type of quarter-turn valve, meaning it is operated by a quarter turn of the valve handle. The valve consists of a ball with a hole in the middle, which is placed inside a cylindrical body. When the valve is in the open position, the hole in the ball is aligned with the flow of the fluid or gas, allowing it to pass through. When the valve is in the closed position, the hole in the ball is blocked off, preventing the flow of the fluid or gas. Control ball valves are used in a variety of applications, such as regulating the flow of water in plumbing systems, controlling the flow of fuel in engines, and controlling the flow of air in HVAC systems. They are also used in industrial applications, such as controlling the flow of chemicals in a manufacturing process. Control ball valves are reliable, durable, and easy to maintain, making them a popular choice for many applications.