For a quality compressed-air supply, maintain the correct volume of air available for the powder paint system. Clean, dry air is important. The compressed-air supply feeding the powder system needs to be conditioned. This is accomplished with a properly sized air dryer. Either a refrigerant or regenerative air dryer is acceptable. When the air volume required is 500 scfm or greater, a regenerative unit may be preferred. Other items required with the air dryer are a particle filter and a coalescing filter.
Air quality requirements are three-fold: maximum oil content of 0.1 ppm, dew point of 35°F or lower, and particulate matter no larger than 10 microns.