Best Value Vacs 1 lb Apollo Dewaxing Closed Loop Extractor1 lb Apollo Dewaxing Closed Loop Extractor The 1 lb Apollo Dewaxing closed loop is a great introductory unit for small scale production. The 1 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.