Contamination can occur from a variety of courses including the intake air, system piping, systemic leaks, inadequate filtration and the act of compression. For example, the compression process squeezes water vapor from the ambient air, thereby contaminating the compressed air. Carbon Monoxide is produced when the compressor’s oil-based lubricants are exposed to heat. If the intake is located in an area where vehicles emit large quantities of exhaust, excess amounts of CO2 can contaminate the air.
Regular maintenance of compressed air systems can help ensure the quality of the compressed air. Since contamination can be introduced during maintenance it is equally important to test before and after this work is done to ensure that the system maintains the necessary quality levels.