Stoked to hear this! Now imagine being able to open a second line…
And good thinking on using the old cmep for pulling vac safely (assuming there’s a tiny bit of solvent left in your tank that your dip stick won’t reach)
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Once I get my heater upgraded I’m going to run a second half inch recovery, with it’s own dedicated sieve and coil. Both coils will go to a manifold on the solvent tank.
My issue now will be vapor production to feed those lines. Once I get my heater upgraded and get that second recovery line coming I should be very close to 2lbs/min I believe.
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What size system?
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the debate continues Hahahaha
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I only say that because to achive that on whaat i run would cost some $ in dry ice for sure
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Yeah it’s a lot of dry ice, but luckily I can get it from local grow stores for about $0.45/lb. recovery is about 40lbs of solvent.
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Sorry in advance this might seem like a redundant question.
Even with the 1/4" line from condensing coil back to solvent tank you got a huge increase in recovery speed? Also just to be clear (trying to wrap my head around this) you have no chiller what so ever just DI slurry on solvent tank and coil?
Yes, I’ve found that once the phase change has occurred the massive lines aren’t necessary. I could probably increase speed a little more if I switched the line after the coil to a larger one, but the flow of butane back into the pot is more than sufficient.
Yes that’s correct also, no chiller whatsoever. Solvent tank on dry ice, injection and recovery both have a condensing could which sits in a dry ice and acetone slurry.
Solvent typically hits my material at roughly -50c or -55c, which is plenty cold for me.
I can absolutely rip recovery now if I vacuum my solvent tank down and keep my heater at about 32-35c
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I have 1/2 lines all the way to the recovery tank. Next level.
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Im in the process of trying to go passive as well. I read that part about vaccing down after nitrogen assist can you expand more on that and how you did it? I want to try but it makes me nervous using a vac while the system has a bunch of butane moving around. If your solvent tank was on DI does that mean there wasn’t much pressure to vac down anyways? Im just trying to picture it.
I have the ability to do any size up to 2" from my collection but my coil is a 1/4" and the solvent tanks im using are 3/8 valves at max.
It sounds like this is the way to go so I really want to go passive!
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Bumping for answer
Curious I just looked up what a sieve is and apparantly it’s an alumina silicate and isnt activated alumina also that? And I’ve heard that silica gel and activated alumina are both desiccants so my question is would running aa and silica in a crc remove the need for a sieve?
I think there’s still moisture from the dry ice and Acetone or denatured alcohol slurry that the collection base is in.
Interesting. I wonder if anyone could give a detailed explanation of this I would live to hear it and I am curious if such little but if moister would pose a problem without a sieve as it would be filter out the next run. Maybe if the tank is going to sit for awhile sieve and store?
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I am going to assume its passing through as A gas and that’s why they run it from bottom to top in that situation
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The sieve is filled with beads used to take moisture out of the solvent on the way back to the solvent tank. You can use it without one but then you contaminate your tanks.
I was curious about vacing down while the system is running to get that vacuum in the solvent tank.
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It is done. But you need to watch the vapor pressure. You can hear and see on the gauge when you start pulling butane vapor. You need to have the collection cold so the butane is wanting to be under vacuum without changing phase.
Is it safe with a standard vacuum pump? Probably not. Do I do it…absolutely.
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Haha nice ok!
So I was gonna take a shot as passive next run and I have 2 solvent tanks I was gonna put on DI. I should also have the collection on DI? I have nitrogen assist as well. So I run everything through into collection then vac down the solvent tanks then open up the recovery line?
Im gonna try it ill just make sure to be careful and watch my guages!
I think you missed the point of my post… the beads in the sieve are alumina silicate (or activated alumina) so my point is crc has activated alumina and silica gel is also a desiccant ( a hygroscopic substance used as a drying agent) so a case can be made that crc will remove moister from the solvent ?