DIY Closed Loop Extractor

Ya i got one in my kitchen lol. My plan to take it with me is that island oxygen should have a compressor capable of blasting any psi I want in there. I’m running just n butane, but ya never know down the road. So I figure I can ask them ti put in any psi I want, but clouds said 30-40psi for a blend, so I figured if they put 100psi in it and it holds and doesn’t blow the seals I’m happy with it

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I run a 80/20 mix, and during recovery my psi gets up to around 60psi. So definitely test at 100psi if you’re gonna use a mix.

And good on the extinguisher lol, it’s a must have.

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yeah good point on the blend ratio, the more iso butane or propane, the higher the pressure at room temp.

Also, the smaller the vessel, the quicker and more pressure will build.

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30 psi isnt shit.
I would NOT consider that pressure tested. Do not run it without putting atleast 100 psi for 24 hrs with no leaks. I do 150 psi. We arent just telling you this because we like typing

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I have a new closed loop extraction device here, if you need advice or purchase, please contact me.info@zzkdinstruments.com

If your storage and collection are same size , you should be able to fill storage with the correct amount of solvent of choice, 80% fill, But if your material column is larger than the amount of solvent you run , you may not get good soak/contact , just a thought
A solvent recovery scale or something of the sort can ensure you don’t overfill your storage vessel

60psi in collection or in solvent tank? ive never hit 60 on recovery, just curious

During recovery and in my collection pot. During the actual run, if I’m not using crc, my psi stays around 40 when I use a chilling coil and room temp solvent tank.

Or if I’m pre cooling my solvent and using crc, I use a nitro push at about 40-50

I put my tank in a water bath set to 95-100f. I usually let it get to about 50psi before I start recovering, but I’ve stepped away for a second and have seen 60psi.

I run a 80/20 butane propane mix.

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ok, that makes sense , i recover at 70f sometimes a lil less, seeing no more than 20psi at collection

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On pressure and vac testing the collection pot; is it recommended to do this without the column attached? I just have questions on testing seal of collection pot if inevitably the sealed system will be broken to add a filled material column.

your tri clamp joins will likely not leak, so that isn’t too much of a worry. The source of leaks is 9/10 times within the fittings. My system is too big to fully submerge in water for pressure testing, so I break it down into smaller sections and test them individually…

For instance, my fittings that go on the top of the column, and valves below the column - I just clamp all of these together, or simply use a 6" tri clamp tube for testing.

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pressure test your system assembled, configured how you would run it
i have guauges and ports on each vessel, so once I’ve vac’d down I can isolate each and narrow things down , I am able to locate leaks easy this way
Your system is smaller , still test assembled as you would run

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That’s what I do, put some soapy water in a spray bottle to find leaks, or buy some leak detection fluid if that’s not showing where the leak is. It’s a little less viscous than soapy water so it doesn’t make its own bubbles, that makes it a little easier to find those small leaks.

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this is solid advice too if you can’t submerge it in water

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Just an update everyone, Matt survived lol.

Most of us have been there at some point, sounds like his run was successful :+1:

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If the system can’t hold enough volume, why not just add the other spool to the top of the collection, then go ahead and call @Killa12345 and get yourself a 6 gallon gas tank. Yet I agree you need a site glass, seems sketchy not knowing what’s going on in the collection pot

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That’s exactly what I did, I added a 4x6 spool, bought the solvent tank, and cooling coil.

Then for my collection pot, I got a 4-1.5 reducer with npt port and sight glass to clamp to the 1.5.

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Crazy how like minded most of us are. Ive literally never met anyone in my personal life that does what we do.

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It’s awkward, but gets the job done. If I was starting over, I would have gotten a bigger pot, but this was a retro fit

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Truly awkward, but ingenious! I love it

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