I don’t use pumps. It all depends on the extractor. I can run active, just prefer not to. I don’t like the hot temps needed to overcome the high vapor pressure they create. They cost too much in maintenance, upwards of a grand a month on regular heavy use.
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What kind of vacuum depth can you achieve when recovering out of a vessel using that method?
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I have a full vac on my tank when I open for recovery,if that’s what you are asking
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Do you empty your tank and pull a vacuum on it before recovering, or is it done prior to injection
Lol. Don’t trust anything I say huh? As @Dred_pirate said. Passive is pretty good for me as well.
I don’t recover a lb per min but I’m sure if I wanted to. I could get close to those numbers with a combination of dry ice slurry and nitro push. I do recover about 1lb every 4-5 mins with no assist. The most gas I have to recover is 8-10 which is easily done inside of 45 mins.
As I said before. You need to make sure your pressure tested perfect. Any leak is gonna extend your process.
there really isn’t that many options for active recovery.
Appion, Tr-21, trs-21, cmep, Haskell, mvp. They all have their positives and negatives. Some are disposable where others are rebuildable. 2 take screw compressor. Some take phase 3 power for the compressors. Some don’t work well
With propane.
The reason I haven’t really went active YET. Is there really isn’t a great pump yet for our industry.
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Think I trust u more than anyone bro…
Just like hearing some others too… But I have no need to change the way you got me going, to perfect!
My system seems to be sealed, today I putting her in the tub… Not running for several days to ensure entire system sealed…
My first recovery attempt was sealed perfect and that fast,I had few mishaps so I finally have her back sealed
After research, without doubt
Passive recover times play souly on couple things it looks like to recover fast
1st and foremost, A SEALED SYSTEM!!!
next constant and adequate cryo temps and water temps…
Last but not least, STAGE THAT COLD!!!
I PROMISE IM LEARNING!!!
And it’s nothing but proof bc the couple times I tried not being sealed and not staging right, each time took double the time
@Killa12345 I appreciate everything you’ve done, without help from ppl like you I wouldn’t be able to even operate this thing yet!!!
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My solvent tank is pulling a vac anyway, as how cold I keep it, I’m just pulling a vac to remove the nitro to keep my tank at neg pressure.
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U pull vac w regular pump… Can’t u get it cryo cold and open bleeder on top tank?
I have an SOP in place for removing the nitro. My tank is always sub -50. I usually have it kept at -57. I have a 200lb double jacketed infinity tank.
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Huh, never needed a entire sop to release n2.
If your tank is cold you can just pull the pressure relief valve untill it stops.
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That’s how I rolled. Although I venteded to the outside world and then directly into the C1D1 exhaust vents.
Would be willing to use a Haskell or CMEP-OL to put it back in a tank too. But I’m fighting an uphill battle against pushing with propane
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I got lost here in your guys conversation. How on earth are you pulling a vac on your solvent tank during a run? Especially with a 200lb.
Also not sure why the hate on the TRS21’s those things are work horses man back in the day I beat the shit out of those no problem, yeah they’re a bit slow but you get what you pay for. My dual cmep’s have been…meh… fast but lots of bs. Thinking of going passive and using them for backup.
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I vac out the nitro from my tank. I don’t just vent it, I pull it back down to vac. I don’t run active, so it’s not during a run, it’s before I start recovery. I have certain pumps and membranes that allow me to pull a vac safely on my tank.
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Membranes? Of the semi-permeable variety?
And you’re keeping it secret?
Does that sound like a challenge to anyone else (@Future?)
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It’s just a nitrogen permeable membrane. Hydrocarbon molecules are huge compared to nitrogen. In a tank @ -57 there should be next to nil hydrocarbon vapors, but if there were. They can stay put. I can pull vac and not hurt any pumps, vapor (if possible) in the air, and recover at a very high rate and low temp
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That sounds like a brilliant idea, and might be all I need to get my nitrogen tank installed 
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Maybe someone should design an explosion proof sparkless diaphragm pump that recovers explosive hydrocarbons.
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Woof!
Does $12k qualify as the cheapest recovery pump these days?
Or just the least expensive one likely to get the job done?
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For that price, if you had a jacketed tank, you could buy a chiller and an lc02 jacketed coil to run passive. Probably save a couple bucks and run faster. Not to mention silent.
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