Automatic Refrigerant Filling Equipment Integrating Oil Separation for Impurity Filtration Advanced Filling Technology with Integrated Contamination Control Refrigerant reaching the charging head is rarely as clean as when it left the cylinder. Compressor oil, brazing residue, moisture, and fine particles travel with the gas, causing slow drift in delivered charge, sticking valves, and unexpected downtime. The HongCe HC-RF-S1 addresses contamination as an integral part of the