Closed-loop extraction

This most commonly refers to a propane or butane extraction, but officially a closed-loop is a chemical extraction used to produce cannabis concentrates. In addition, it recycles the hydrocarbon solvent or CO2 and throughout the process, no solvent is exposed to the open air and is contained in a closed loop system.
Closed-loop extraction (CLE) requires a professional configuration which involves maintaining the pressure at all times and operating the control valves with several cannabis extraction equipments, but remembers the complexity of the process will be depending on what you are trying to make or produce.
Therefore, a closed loop system is a much safer way than open blasting methods for extracting cannabis oil and working with flammable solvents.
“I have seen a trained tech practicing with closed-loop extraction and industrial grade equipment within the laboratory”

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