Standard Ball Valve
A standard (full-port) ball valve consists of a ball with a single hole installed in a tight-fitting chamber. Using the handle on top of the valve, you can rotate the ball through 90 degrees. When the hole aligns with the pipe, water flows freely. When it’s perpendicular to the pipe, the flow stops. It’s a non-adjustable, all-or-nothing valve.
Ball vales are most commonly used as the main water shutoff valve in a house, but they have multiple other uses as well. They come in a range of sizes with diameters, from huge to the tiny quarter-inch valves used for drip irrigation systems. The 64-inch CIRCOR valve, controlling water flow from the Ras Azawr desalination plant to Riyadh in Saudi Arabia, is the world’s largest.
Ball valves can be made of brass, PVC or ABS plastic and stainless steel, among other materials.
Article source here: 7 Types of Water Shutoff Valves
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