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Forged Steel Wafer Check Valve Operation 2012-01-10

Wafer Check Valve are used in several different devices, and they are advantageous for several reasons. For example, they stop flooding or overflowing in sump pumps and water heaters. They protect equipment in control valves, strainers and flowmeters. They also save power, because the backwards-flowing water would use up electricity even when the device was off.

There are several different types of check valves. A ball Tilting Disc Check Valve consists of a ball that sits over the valve's opening. When liquid flows past the ball, it pushes the ball away from the mouth of the valve, which gives it room to flow through the pipe. When the liquid begins to flow the other way, however, the ball fits tightly over the valve opening, essentially plugging it.

Most valves work in a similar way, although they may not contain balls. For example, swing check valves contain a swinging door on hinges that blocks backward-moving material, and split disk Forged Steel Check Valve contain a folded metal disk that springs open when the material moves backwards.

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