A ball valve is a type of valve that is used to control the flow of fluid through a pipe. It consists of a hollow ball that is connected to a handle, which is used to open and close the valve. When the handle is turned to open the valve, the ball is rotated so that a hole in the ball aligns with the flow of fluid, allowing it to pass through. When the handle is turned to close the valve, the ball is rotated so that the hole is perpendicular to the flow of fluid, blocking it. Ball valves are often used in plumbing systems, as well as in industrial and commercial applications, because they are relatively simple and easy to operate, and they can withstand high pressures and temperatures.
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