![]() ![]() This is a disadvantage of these units because they are more likely to require maintenance and repair. Rotary vane pumps use oil to lubricate the pump components. These pumps can last a long time and save money in the long run but require a more significant investment upfront. There are several different types of vacuum pumps, some of which we’ve described below:ĭiaphragm pumps are an excellent choice for cannabis extraction because they do not use oil and have many other benefits. To ensure that you have the best possible final product, make sure your equipment and accessories either contain no oil or possess a sealing capability, so that oil and other contaminants aren’t introduced into what would otherwise be pure extractions. The butane is evaporated by the vacuum pump to create a potent product with minimal impurities that cannot be achieved without it. Vacuum pumps are essential for a quality extraction process. A vacuum chamber will also have a gauge to measure the atmospheric pressure in inches of mercury, designated in the form inHg or Hg. ![]() ![]() Commercially, the vacuum chamber includes shelving units where the technician can place several trays containing thin extract films. Inside these specialty chambers, there are also racks or plates on which operators can place BHO. A vacuum purge chamber has a stopcock valve that controls how much gas flows into the system at one time. The Vacuum Chamberįor vacuum purging, the best equipment will be able to heat every part of your extract evenly and quickly. Different equipment will require varying lengths of time and temperatures to purge solvents from products like shatter or wax. To produce a high-quality product, it is essential to know the best methods for purging your solvent. It removes solvents used to create crude oil, helping ensure that your products pass state-mandated residual solvent limits. We’d suggest that the vacuum purging process is one of the most essential steps in making a quality BHO extract. The vacuum chamber used for vacuum purging lowers the pressure so that the solvent can boil off at a much lower temperature. When the atmospheric pressure is lower at higher elevations, the boiling point for liquids goes down, too. When there’s an increased atmospheric pressure, it takes more energy for liquids to boil, so their temperature will rise accordingly. This process lowers the boiling point of butane so the oil can be purged of butane without damaging any of the therapeutic or psychoactive compounds in the marijuana plant material.Īt sea level, the weight of the atmosphere creates 29.92” inHg of pressure, which affects the boiling point of liquids. Vacuum Purging 101Ĭrude oil, the raw oil that’s extracted from cannabis plant matter during BHO extraction, is put in a vacuum chamber that reduces atmospheric pressure. As part of an optimized post-processing workflow, the vacuum purge removes the residual butane from BHO so it can be used safely either medicinally or recreationally. This potent extract has been known by many names like butane hash oil or BHO, because it’s made using butane to extract the resinous material found in the cannabis plant.ĭuring processing, BHO is vacuum purged to remove excess solvents, which allows for a clean and flavorful product. We explain the science & equipment.īutane honey oil is a thick, golden sap-like cannabis concentrate that contains an abundance of cannabinoids and terpenes. If you want to create quality products, learning how to vacuum purge your BHO extracts is critical to remove residual solvent after extraction.
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