The final stage of the filtration involves an oil-adsorbent material like activated carbon. This oil-absorbent material then can collect and stabilize most of the oil, and by doing so, it will lengthen the life of the activated carbon cartridge. This cartridge is typically made of an oil-absorbent material like polypropylene fibers. Liquids are drained down into an oil filter cartridge.
This condensate is accompanied by a fraction of compressed air waste that is released when the drain valves open and close.Īir is then allowed to depressurize in the chamber and is vented back out to the atmosphere, so it doesn’t interfere in any way with the filtration process. These designs will have multiple stages of filtration, typically four as follows: Stage 1:Ĭondensate from drain valves enters a chamber for depressurization.
It may be, and this is very common, that the oil-water separator works using a combination of absorption and adsorption. Now, due to this contamination, the condensate from compressed air systems cannot just be dumped down a drain or into the environment, therefore, oil-water separators are needed and so important in compressed air systems! This oil vapor then mixes with water vapor in the compression stage before falling out with the air along with the water condensate. The heat that is generated within the air compression stage causes a small amount of oil to vaporize each time that the compressor is used. While the air then passes through the compressor, the condensate released includes both liquid water from the moisture of the atmospheric air, and oil from the lubrication within the compressor. As you compress the air and decrease the volume, the molecules are forced to collide with each other, increasing their kinetic energy, and subsequently their pressure and temperature.Īs the compressed air then cools in the system, the cooler air is unable to hold the moisture, and this begins to fall out of the air as condensate. This is because the now-pressurized air has become saturated in the compression stage. When you compress air, an inevitable by-product is condensation.
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