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The process of compressing a gas creates heat. Also, moisture contained in the gas is compressed and turns into droplets which will carry along oil droplets from the lubrication.
Depending on the application, the heat, water and oil have to be removed before the air is used.
Aftercoolers come standard with many compressor design, or can be added to the system.
To remove moisture requires an air dryer. This can be an electric cooler or desiccant air dryers.Desiccant dryers require heat. The heat can be generated externally (Heated). or be generated by the desiccant beads themselves (Heatless)
The water that is removed from the air carries oil with it. The oil and water have to be separated before reusing or disposing.
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