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Ball Valve
By: Steve L.

What is a ball valve? A ball valve, one kind of quarter turn valve, is quite literally a ball placed in a passage way thru which fluid flows. The ball has a hole through it, by which the valve opens and closes. When the ball is positioned so that the hole runs the same direction as the passageway, the fluid simply flows thru the hole, and the valve is open. However , when the ball is positioned so the hole is at right angles to the passageway, the fluid cannot pass thru, and the valve is closed. The ball is controlled from outside the valve, regularly with a handle that's turned ninety degrees, or a quarter turn, back and forth to open and close the valve.

The basic ball valve is a two-way valve. This ball valve has a single, straight passageway bored thru the ball, making 2 openings : one on each side, an inlet and an outlet. A ball valve may also be a three-way valve if a 3rd hole is bored partly through the ball, till it meets the main hole, forming a T. A three- way ball valve can shut off one or all of the 3 passage ways it connects.

Due to the nature of the ball valve, it doesn't work well in situations in which fine control of the valve is required, for example the valve that controls the throttle in an automobile. However , a ball valve works very well for situations in which a flow needs to be completely shut off, such as the shut-off valve on the main water line in your house. Control valve also don't tend to develop Problems if they don't seem to be used for long amounts of time ; they'll still work completely when required again.

There are three differing kinds of ball valve. A full port ball valve offers no flow restriction, which means that when the ball valve is open, the liquid can flow unreservedly through it. This is achieved by making the ball bigger than the passage size, so the hole bored through it can be the same size as the passage. A standard port ball valve does not have a large ball, and as a result the hole is one size smaller than the passageway. This presents a bit of flow restriction as the fluid passes through the ball valve. A reduced port ball valve, on the other hand, has an even smaller ball and an even smaller hole, which creates significant flow restriction as the fluid passes through the valve.

Article Source: http://www.onlineprofitswork.com/articles

The contributor to this article is an R&D engineer of a company offering ball valve manufacturing and related flow equipment manufacturing.

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