Compressed air purity requirements vary significantly across different points of use, depending on the specific demands of each application. The table below outlines the full spectrum of compressed air purity classes, while clearly mapping the corresponding Atlas Copco filters and dryers engineered to meet and exceed these stringent standards.

For personalized recommendations and assistance in selecting the optimal air treatment system for your operations, please contact your dedicated Atlas Copco sales representative.

Examples of Typical Installations

• Achieving Particle Class 1: While Particle Class 1 air quality can be achieved immediately after passing through a UD+ filter, downstream piping and storage vessels may introduce additional contaminants. To ensure consistent Particle Class 1 air quality at the point of use, we recommend installing high-efficiency particle filters such as the DDp+ and PDp+ directly upstream of critical applications.
• Liquid Water Management: All compressors should be equipped with a robust liquid water separation system, such as an aftercooler with an automatic drain or a standalone water separator (WSD). This foundational step prevents excess moisture from entering downstream filtration systems. For coalescence filters, it is mandatory to install a water separator upstream to protect the filter media and maintain optimal performance.
• Critical Application Protection: In high-stakes applications where even minimal contamination can disrupt production or compromise product quality, we advise implementing supplementary air treatment solutions at the point of use. These additional systems effectively remove pipeline-generated contaminants and condensation, ensuring uncompromised air quality for sensitive processes.