The following is the complete working process of the closed-loop extractor:
1. The closed circuit extractor works from the top. The user places the material into the top filled inlet port and then flushes the material into the material column with a solvent, and then the oil passes over the top of the material to be collected.
2. The oily solvent will collect in the collection chamber below the material column.
3. The solvent will evaporate and recover in the collection chamber, while the oil will remain in the collection chamber.