Air leaving a compressor normally has a high-water content as well as some oil carry over, and to remove these impurities, filters will need to be added to the compressed air system.
Depending on the application for the compressed air, different filtration levels are required:
- Compressed intake filters remove over 80% of particulate contaminants to 0.3 micron.
- Particulate filters are used to remove dust and particles from the air.
- Coalescing filters oil, water aerosols, dust and dirt particles to 0.01 micron.
- Activated carbon filters remove odours and vapours.
- Bacteria filters remove bacteria.
Filtration is particularly crucial in industries such as food and beverage, medical and pharmaceutical.