A ball valve is a flow control device which operates using a spherical ball with a hole (also known as a bore) through the middle. When the valve handle is turned, the ball rotates to align the bore with the flow path—allowing fluid to pass through. Learn about ball valve specifications and functions, including the different types of ball valves , their applications, and how to choose the right one for your needs. What are ball valves ? Ball valves are rotary motion actuated valves ; they have found widespread applications due to their simple design, low manufacturing cost and low maintenance requirements. This type of valve is ideally suited for open/close cycling and can be used for low to very high flow rate systems. Ball valves are classed as fast acting as only a quarter turn (90 degree) of the valve disc is necessary to completely open or close the valve . Ball valves are one of the most common ... Learn everything about ball valves, a type of valve that uses a spherical perforated obstruction to stop and start the hydraulic flow. Find out the parts, types, working, materials, testing, and uses of ball valves in various industries.