The 2-way ball valve is one of the most common valves on the market. It has 2 ports, an inlet and an outlet, and a ball with a bore in it. They are operated by a manual hand lever to turn the ball 90 degrees, which is why they are often called quarter turn ball valves or shut off valves. They are one of the most common valves due to their simple operation, reliability, long service life, and wide range of application uses. Various connection styles are available (threaded, flanged, etc.) for easy application installation. A threaded ball valve is the most common, as they are simply threaded into an existing assembly.
A 2-way ball valve making it a straight ball valve. Therefore, media will only flow in one direction and they are considered inline ball valves with the rest of the assembly. If the valve is open (handle parallel to the pipe or hose), then the media will flow from the inlet, through the ball's bore, and out the outlet. If the valve is closed (handle perpendicular to the pipe or hose), then the media flow is shut off. Thanks to the quarter turn ball valve operation, they are easy to use and you can visually see if the valve is open or closed.