Air purity in Atlas Copco screw air compressors is defined by ISO 8573-1, which measures particles, moisture, and oil content. Oil-free screw compressors deliver Class 0 air (100% oil-free), ensuring the highest purity for sensitive industries like food and pharmaceuticals, while oil-injected models provide Class 2–3 air with proper filtration and dryers. Overall, air quality depends on the compressor type and the use of filters and drying systems.
