Chicago Pneumatic Air Oil Separator is a high-precision coalescing element designed for the QRS, CPA, CPB, and CPC series rotary screw compressors. As the final stage in the oil-injection cycle, its primary function is to extract pulverized oil aerosols from the compressed air stream before it exits the compressor. Utilizing a multi-layered borosilicate microfiber structure, this separator ensures ultra-clean air with a residual oil carryover of less than 3 ppm. By returning separated lubricant back to the main sump, it minimizes oil consumption and prevents the contamination of downstream piping, air dryers, and pneumatic tools. Built to withstand the rapid pressure fluctuations of industrial load/unload cycles, this component is essential for maintaining a low differential pressure and high energy efficiency.