It is important to first understand that the unit moves solvent using differential pressure. Solvent evacuates from the cans which are at a higher pressure (30 – 40 PSI) into the extractor which is at a low pressure (-29″ Hg). As the can empties, the pressure in the extraction unit increases until it equalizes with the can. The first portion of solvent in the can unloads as a result of the vapor pressure of the gaseous butane pushing out most of the liquid butane. The can-tapper needs to be tapped about an inch up from the bottom of the can so that only liquid solvent comes out of it. The remaining solvent in the can needs to be removed with a temperature exchange, such as using ice water to chill both the recovery tank and the collection chamber. The coldness will cause a pressure differential, condensing the solvent back into [...]
The amount of time it takes to pull a full vacuum on a BHO Buster system varies depending on the CFM of the pump as well as the size of the extractor. If you have a 3-5 CFM pump, it shouldn’t take you more than 7-8 minutes to pull a full vacuum on a 1 lb BHO Buster . Using the same 3-5 CFM pumps, pulling a full vacuum on the 2 lb BHO Buster unit may take roughly 10-12 minutes. For the 5 lb units you’ll need to use a vacuum pump which is closer to 7 CFM. With the larger pump, it should take no longer than 10-15 minutes to pull a full vacuum on the 5 lb unit or the 8-10 lb unit.
The double bolt clamps should be evenly clamped down on both sides, switching from one to the other consistently. A washer should be in between the bolt and the clamp, tighten the bolts down with a tool until you hear them squeak. The clamps do not need to be touching to be tight. Tightening of bolts is crucial to a safe bho extraction process. Torque Rating: 20 lbs
The double bolt clamps feature a bolt on each side of the clamp to evenly distribute the pressure between two bolts instead of one. Butterfly clamps are more prone to failure and when they do fail they have nothing to hold them together. The double bolt clamps are also a lot more reliable with maintaining a seal. Tighten the bolts on both sides of the clamps evenly. Tighten them until they squeak a little, and you are good to go. The butterfly clamps loosen up and tend to need to be re-tightened due to temperature a few times during extraction.