Types of Air Treatment
The air exiting any compressor may contain many different forms of contamination that may require removal, based upon the requirements of the end users. These contaminants may come from the environment (such as dirt, chemicals, and water vapor), or may be introduced by the compressor (lubricant, for example).
Many contaminants are not compressible, so that compression actually concentrates the contaminants.
Additionally, increasing pressure of air reduces its capacity to hold water vapor, therefore causing liquid water to drop out of the air, and contaminate and corrode tools and machinery.
Fortunately, there are methods of removing these contaminants. Compressed air dryers remove moisture, while various filters are available to remove oil and particles.