Compressed air contamination

Why is compressed air contaminated?

July 8, 2022

Untreated compressed air always contains contaminants because of the nature of the gas and how it is produced. The need for air treatment basically results from 3 characteristics of compressed air.


  • Liquid oil - oil aerosols - oil vapor
  • Dirt - microorganisms - pipescale
  • Trace gases: carbon monoxide, sulfur dioxide, nitrous oxide

How are the contaminants formed?

Added by the compressor installation through oil lubricated compressors (oil), adsorption dryers and activated carbon filters (dirt), piping network and vessels (pipescale).

Trash in, trash out: oil vapors from car exhausts and industrial processes, atmospheric dirt and micro-organisms get sucked in by the compressor. As with water, their concentration – and thus side-effects – increases significantly after compression.

Why is compressed air contaminated?

What problems can the contaminants cause?

  • Damaged production equipment, leading to inefficiencies and increased costs
  • Air pollution, creating unhealthy work environments
  • Pollution of the condensate

The Pneumatech solution

Pneumatech offers you a comprehensive line-up of filter solutions. For general applications we provide oil coalescing, particulate and oil vapor filters in a wide range of flows and pressures. We can also support with breathing air, silicone-free, sterile and process filtration.

Compressed Air Filters Product

Compressed Air Filters

Compressed air can contain a wide range of contaminants, from oil droplets to sand and dust particles. However small, these particles can cause downstream equipment malfunctions, product contamination, and other quality issues. Depending on your application, you may need compressed air filters to prevent air system quality, reliability, and efficiency problems. Pneumatech offers various types of compressed air filters to remove any type of contaminant.