Hello, ball valves cannot replace angle valves.Angle valves are mostly a kind of stop valve.Its name is because its inlet and outlet are at an angle of 90 degrees, rather than straight in and out as normal valves. The cut-off valve can accurately adjust the flow. The cut-off valve is also called the ball valve. Note that the word "shape" is added, which is not a valve with the ball valve. Angle valves are used to cut off the medium and facilitate the maintenance of terminal equipment. They are generally used for cold and hot water inlet pipes of washbasins, kitchen sinks, toilet tanks, and water heaters.