Refrigerant Filling Equipment Performing Pipeline Evacuation for Residual Recovery Refrigerant Filling Equipment with Pipeline Evacuation and Residual Recovery Before a refrigeration circuit is charged, it must be emptied of air and moisture, and the pipeline connecting the machine to the product must be properly prepared. Manual processes for this are slow and typically result in residual refrigerant being released to atmosphere. The HongCe HC-RF-V2 combines pipeline