There are various types of valves. One type of valve is a ball valve. It has a round disk in it. The disc has a hole in it. When the holes are lined up with the rest of the hose or pipe, or open, allowing fluid or air to flow through.
When the hole is not parallel to the pipe, or closed, no flow occurs. There are many ways that this device can operate. There are actuators, that person should open or close manually, but the most common type is a ball valve that is pressed. You can get more information about hydraulic valves at https://www.athydraulics.com.au/product-category/hydraulic-valves/.
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This is a kind of valve actuator, which has an external force that causes the valve to open or close. There are many types of ball valves which are actuated, and what can be their power. One type is a pneumatic valve. The ball valve itself can be broken down into several types.
You can find the ball joint in a variety of sizes, so you can choose the one that will fit your product and their needs. Because there are so many choices in size, manufacturing, actuators, and materials for ball joints, it is easy to find one that works best for you, no matter what you need for it to do. The best are made of stainless steel, which will not rust and will last for a long time.