Oil content in parts per million (ppm) is a critical parameter for compressed air quality, and it is classified into grades from Class 0 to Class 5 according to ISO 8573‑1. Class 0 denotes oil-free compressed air (≤0.01…

The high-altitude, low-oxygen, and wide-temperature‑range environment of Qinghai poses unique challenges to air compressors. Oil-free screw compressors, with their zero oil contamination, high purity, and robust environmental adaptability, have become the ideal choice for industries such as food,…