Are the recovery ports 1/2 or 3/8. They look narrow
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On that yellow tank? 1/4 comes on those tanks afaik
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My bad. I didn’t specify. The green machine labs Solvent tank. The two top recovery ports are only 3/8. I believe. I want a solvent tank like that. With a open jacket. With 1/2 ports
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Ya i have it. Its a good tank
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Wondering if someone could help me narrow down what went wrong.
I’ve been running a 1lb column passive recovery.
In short, the dip tube on my recovery tank froze. Tonight was the first night running a new set up so not sure if it’s because of that or if it was just a fluke.
Normally I’ve been running with one line.
Recovery Tank → Column and vacuum at the collection pot. Then once the recovery tank is emptied I’d disconnect and run the line to the recovery tank from the collection pot into the liquid port on the recovery tank.
Everything ran fine.
Today, I ran for the first time a 3 way manifold with the vacuum line connected to a t-valve that goes to the recovery tank and vacuum. Everything vacuumed down fine. The solvent was a little slow running to the column but eventually all made it over. When the time to recover, the recover tank was at -30psi and the collection pot had 20psi, when I opened up the valves for it to go to the recovery tank, nothing. I double checked everything, all should have been working. I bleed the line a little on the recovery tank and sure enough there is butane coming but not going into the dip tube.
Eventually I just closed off all the valves bleed the lines that were connected to the manifold and switched back to just connecting from the collection pot to the recovery tank through the vapor port and it started flowing like crazy.
- Was it just a fluke that the dip tube got frozen?
- I have all 72" hoses, is that too long of a line for it to properly move the solvent? Should I replace some with shorter hoses?
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Moisture in your solvent? Do you have a mol sieve to keep your gas dry?
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No mol sieve yet. It’s on my list to get though. Just don’t know why now of all times it caused an issue.
Is there any hinderance of the recovery time when adding a mol sieve into the mix?
@Dred_pirate would be a good person to ask if mol sieve slow down passive recovery at all. What about biomass is it fresh frozen? What’s the moisture content like compared to your previous biomass?
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A slight slow down. But if that moisture you’re trying to avoid hits your condensing coil you’re screwed. Only takes a smidge of water to condense in the coil to destroy recovery speed even further.
For faster recovery I’d suggest jacketing the mol sieve and keeping it warm so the solvent keeps moving through the system.
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Definitely sounds like ice build up
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If you have that happen once or twice more that will cost you kore time than what tiny sliver you’ll lose with having a sieve on there.
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molecular sieve adsorption is exothermic. it could speed your evaporation up if you pass all your extract over it.
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Tried that but the stinch is horrible when drying the sieves at 300 C
Wich is needed to get rid off the oil layer on them after use
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Hey bro how has this worked for you im having trouble getting all my gas from my tank which I keep in a deep freezer until I do a run. I have the collection on dry ice with is and the biomass column and crc are wall mounted. Any suggestions on getting all my gas to move through the system?
Are you using nitrogen to push your cold solvent through your system into your collection?
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Nitrogen.
You don’t even need your collection in dry ice when using n2, as long as you are burping/vaccuming your n2 out of your solvent tank during recovery.
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I haven’t iced my collection since I started using a nitro push…so it’s been a while. Its nice to save on the dry ice used there.
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Exactly. I did it my first two runs and then realized it was pointless. lol
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Hmm yes im pushing with nitrogen but its connected through the top of my column not my solvent tanks. As soon as the gas stops flowing I shut it off and push with nitro… and yes i burp the collection of nitro before starting to recover it works great but it doesn’t solve the gas staying in the solvent tank. I feel like I’m overthinking it and its something easy but I cant figure it out 
Also I didnt know i could get away with less dry ice while using nitrogen?