Closed-Loop Extraction System

Last Updated: August 13, 2018

Definition - What does Closed-Loop Extraction System mean?

A closed-loop system is an extraction method used to create cannabis concentrates. During the process, no solvents are exposed to the open air but are contained within a closed loop system.

The closed-loop extraction system has been used for decades to produce perfume, food additives, and beauty products. Only recently has the method been utilized in creating cannabis oil. It is far safer than open blasting. Utilizing the system is a safer way to work with flammable solvents. The extraction machinery has no openings, so it successfully contains the solvents in a safe and contained environment.

MaximumYield explains Closed-Loop Extraction System

With a closed-loop system, extraction artists can reuse solvents and reduce the risk of explosions.

A closed-loop extraction system is a professional set-up that involves maintaining pressure at all times and operating control valves. It is comprised of a large tank that holds the solvent, an attached tube for controlled and contained blasting, a recovery tank, a refrigerant pump, a recovery pump, and a refrigerant scale that effectively measures the weight of the recovery tank.

To use butane as a solvent, the set-up must also have an oven and a pump. The closed-loop system operates by placing ground up marijuana plant material into the extraction tube. A pressurized solvent tank is attached to the extraction tube. During the entire process, the solvent will remain under pressure. It is controlled with clamps and valves.

The solvent passes through the plant material and the plant’s trichomes are stripped to be deposited into the basin. The used solvent are collected into a recovery tank for later use.

This definition was written in the context of Cannabis
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