Graywolf
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trying it out... my aluminum 20qt pot folded on me during testing and I don't even think it was full vac. still need a gauge so I have no idea if its pulling full vac. back with more pics
the ball valve is there I just put it right next to the pump. please excuse my shady craftmanship I was in a hurry to see how it works. Pretty sure its close to full vac there's a good amount of action when I vac purge. next step is a vac meter.Might I suggest a ball valve between the pump and the chamber, so when you shut it off, it won't aspirate oil from the pump crankcase.
Greywolf is absolutely the person to talk to on this, the rest of us are just amateurs, but I'll repeat what's been said in a more comprehensive manner. My $.02 is that you are not heating up your solution uniformly to a high enough heat for a long enough period of time. Even though the water you add is 115, the temperature of your solution in the glass container will be far, far below this, especially if you are trying to evaporate a thick layer of solvent. Try adding much hotter water; I pour water that's just below boiling from my electric tea kettle into a pyrex dish and then float the pyrex dish with the solution on top of that. I keep changing the water until the reactions are mostly completed, at which point I take it to the vac-purge chamber for 10 mins, scrape it out of the pyrex and transfer to parchment paper, and re-purge for another 10 mins. Shatter *almost* every time.
Don't forget that you need a THIN layer of solution on the bottom of your pyrex dish to allow the most even, complete evaporation of your solvent. Often large growers blast too much solution into a single dish and cannot effectively purge it afterwards; for large runs use large containers or many small ones.
Sliding vane rotary vane vacuum pumps put oil vapors out their exchausts.Hi Connoissuer, It looks like you have the same vacuum pump I do from harbor freight. Does yours smoke a lot out of the black crankcase vent (where you fill the oil)?
Also I use the same Pan/plexiglass setup, would me not having a ball valve be causing me to get contaminants into the BHO from the crankcase oil vapor? I still get a bit of sparky sizzle when I heat my purged oil.
Even a single stage will pull below 100 microns, but with either, you can crack your back fill valve, and control the pressure by bleeding in air. The air will also act like a gas ballast and help keep the solvent fumes cleared from the vacuum pump crankcase.Greywolf, I read on your site that two-stage pumps will pull too much vacuum and boil off cannabinoids. Does this mean they're not suitable for this job, or is there a way to limit the vacuum in the chamber to the desired pressure?
Greywolf, I read on your site that two-stage pumps will pull too much vacuum and boil off cannabinoids. Does this mean they're not suitable for this job, or is there a way to limit the vacuum in the chamber to the desired pressure?
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