Water condensates as vapour and precipitates when atmospheric air cools down after the compression process. This water comes from the atmospheric air. Under average conditions, a compressor with a capacity of 3 m3/min at 7.5 bar will generate approximately 40 litres of water per day. This condensate should be removed from the compressed air system to prevent corrosion and damage to transmission piping and end-user machines. Hence, Compressed air drying is an essential part of the air treatment process.

Compressed air can also contain water, dirt, wear particles, bacteria, and degraded oil. These impurities mix to form an abrasive sludge, which is often acidic and accelerates the wear and tear of tools, pneumatic machinery, block valves, and orifices. This results in costly air leaks and high maintenance. It can also corrode pipes and bring the production process to a halt.