Part 1: Contaminants and purity classes

ISO 8573-1 is the key element of the ISO 8573 series of documents and specifies

  • Terms and definitions
    • in reference to ISO 3857-4 – Compressors, pneumatic tools and machines – Vocabulary – Part 4: Air treatment
  • Reference conditions for gas volume statements
    • 1 bar(a) ; 20°C ; 0% relative humidity
  • 3 major contaminants in compressed air
    • Particles
    • Liquid water / Humidity
    • Total oil (see info-box)
  • Purity classes (for details see dedicated page) for these 3 major contaminants and reference to the according standardized test methods
  • Designation (for details see dedicated page) for compressed air purity statements
  • further descriptions and guidance (Annex)