How Does a Rotary Union Work?
A rotary union is a device designed to direct fluids and gases from one point to another, and this typically occurs under high pressure.
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Design Variations
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Rotary unions come in a number of shapes and sizes. Some are designed so that the substance passes directly through the rotary union on a single port, while others are fed through elbow ports or multiple ports. Many rotary unions are custom designed.
Construction
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Rotary unions are designed to withstand high pressure and heat. They are commonly made of stainless steel, and rotary unions usually incorporate ball bearings in order to keep their motion smooth. The seals are made from rubber and plastic, and they may require occasional replacement.
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Usage
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A rotary union taps into an input valve and then locks onto another device. The rotary union is designed to move, usually rotating on an axis. The machinery it's connected to can freely move with the rotary union attached to it, allowing a moving connection to be maintained.
Industrial Uses
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Rotary unions are common in many industries because of their versatility and convenient size. They are commonly seen on assembly lines, in the processing of crude oil and in the chemical industry.
Other Names
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Rotary unions have a number of alternative names, including rotating union, rotary joints, rotary valves, rotating joints and swivels.
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