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This manual provides a comprehensive step-by-step guide for replacing lubricating oil in an air compressor. It covers pre-change preparations, detailed oil drainage and refilling procedures, oil filter replacement, safety precautions, and post-replacement inspection steps. Suitable for routine and scheduled maintenance, the guide helps operators perform oil changes correctly, extend equipment life, prevent waste, and ensure safe operation. Recommendations are included for initial oil use and determining optimal oil change intervals through oil analysis.

Thanks to their oil-free contamination, high operational efficiency, and strong reliability, oil-free centrifugal air compressors have gained extensive adoption in industries and projects with stringent requirements for air purity and supply stability.