Best Value Vacs 5 lb Apollo Closed Loop Extractor5 lb Apollo Closed Loop Extractor The 5 lb Apollo closed loop is a great introductory unit for medium scale production. The 5 lb closed loop hydrocarbon extraction system performs botanical extraction within a sealed, vacuumed system. Utilizing a top fill input, solvent washes through the material column, collecting oils as it passes over the material. Oil bearing solvent is collected in the collection base under the material column. Once collected,