Oil-free air is required when the cleanliness is vital to the process and the final product. It is normally necessary for the food and pharmaceutical industry. ISO 8573-1: 2010 classify the air purity by taking into account its concentration in particles, water, oil or gaseous and microbiological pollutants. Class 0 air is 100% oil-free, meaning the concentration of oil in the air is less than 0.01mg/m³. To cater to this specific air quality need, WORTHINGTON CREYSSENSAC lives up toits promise to offer pure air to the industry, while being among the first air compressors manufacturers to be awarded the standard ISO 8573-1 CLASS 0. Years of research and hard work allowed the company to be awarded this CLASS 0 certification for its family of oil-free rotary-screw air compressors WIS.