Hi David
Thanks for your comments. One should also be aware that a nitrogen separator
or scrubber will use mor air than what is used in the NMR. We have heard of
compressors giving up early due to excessive run times
Clemens
________________________________
> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> on behalf of Jones, David (Pharm)
> Sent: Tuesday, February 27, 2024 12:08:08 PM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Air compressor dew point -40C or -70C for NMR with BCU1 and BCU2
I would add it’s important to match your compressor and dryer to your
gas flows. Don’t forget to take into account the amount of gas flow
that is needed to run the PSA dryer. These dryers switch between desiccant
towers every 20-30 mins and run gas through the “offline”
drying tower to help flush out residual moisture. This is not insignificant.
We found our compressor was running a significant portion of the time just
to supply gas to the drying component not just to downstream instruments.
If you have house n2 it is a better solution.
Also I think cryoprobe specs are based on N2 as VT gas and not Air. You wil=
l see a degradation in performance with air.
David Jones
Associate Professor
Dept. Of Pharmacology
University of Colorado
School of Medicine
Tel (303)-724-3600
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Received on Tue Feb 27 2024 - 07:42:55 MST