All those percentages would be fine.
I would be wary of the balloon helium being 99%, as there is no reason for it to be that pure.
They switched to about 80% He, 20% atmosphere to prevent ctb.
Many have not remembered to change the figures on their spec sheet.
Thank you. Yeah I don't trust the Balloon Helium either. Since they do actually fill it up themselves, from what I understand, even that should most likely be fine, but yes it's not worth the risk.
I wonder what the "purity threshold" for these methods is.
I mean 99% and up should be no problem, 80% would definitely not work, but what about 95% and such?
At which point would it become ineffective?
And, more interestingly, would 99,9% make a tangible difference to "just" 99%, I wonder?
Regarding my flow-rate problem:
Maybe I should just buy a 2 Liter tank, turn the flow-meter to 5 LPM (from Argon to Helium that
should be 15 LPM) and watch how long it takes to run empty.
I've kind of done that with the testing of the Exit Bags and trying different flow-rates, but that's actually made it more difficult to get a clear picture.
Just letting a smaller tank run completely through might give me the best idea where I actually am, I think ...
Nitrogen would be a smart move.
Since atmosphere is something like 78% nitrogen, the difference wouldn't be noticable.
The densities of Argon, Nitrogen and atmosphere are very close, making the flow meter settings not so important.
Helium is much lighter, causing flow meter accuracy problems.
Helium is currently scarce, causing a significant cost increase.
Yes
Yup, i'd be rid of the flow-rate questions, which remain my main concern.
Would have to buy a new regulator/flow-meter though. Hmm.
Ideal flow-rate for Nitrogen is 20 to 25 LPM, iirc?
Nitrogen is not as light and therefore ideal as Helium, bus
does not have the Argon heaviness problem, right?
Helium being so light was originally why I decided to use it - it's supposed to be the most effective at pushing the heavier CO2 down and out of the bag...