Hi all,
That looks like something well worth building. Can anyone comment on approx.
how much helium is otherwise lost to cool the transfer line (assuming
reasonably good vacuum condition)?
Kind regards,
Luke
Luke Fulton, PhD
CHEM BLDG R003
NMR Core Facility Director
Unit 3060
COR2E & Department of Chemistry
55 N Eagleville Road
University of Connecticut
Storrs, CT 06279
email: fko24003_at_uconn.edu
(alias): luke.fulton_at_uconn.edu
mobile: (603) 953-5275
Office: (860) 486-4069
________________________________
> From: main_at_ammrl.groups.io on behalf of Sameer Al-Abdul-Wahid via groups.io
> Sent: Tuesday, June 17, 2025 9:18 PM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] helium recovery from transfer line
Hi Anne,
Have you seen Scott _at_ BYU’s “Transfer Line Pre-Cool Sheath,”
described at the bottom of this page?
https://chembio.byu.edu/system-details
We built a modified version that skips the flex line and is permanently
attached to our recovery header, right beside the liquefier. We only use
it to flush the transfer line before a transfill from the liquefier to
our transport dewar.
For magnet fills, we’re still venting helium into the lab—our
setup doesn’t have a convenient way to recover that gas. But since
we do more transfills than fills, it was definitely worth the cost to put
this together.
Best,
Sameer
--
Sameer Al-Abdul-Wahid, Ph.D.
Manager, Nuclear Magnetic Resonance Centre
<
http://nmr.uoguelph.ca/>
University of Guelph
519-824-4120 x58914 / s.wahid_at_uoguelph.ca<mailto:s.wahid_at_uoguelph.ca>
> From: main_at_ammrl.groups.io on behalf of Anne Rachupka via groups.io
> Date: Tuesday, June 17, 2025 at 19:09
> To: main <main_at_ammrl.groups.io>
> Subject: [AMMRL] helium recovery from transfer line
Hi all,
After many roadblocks, we are finally in the process of assembling our homemade
helium recovery system. I have one small question on how to capture the helium
from the cooling of a transfer line. I had the idea of a hard pipe-like sleeve
(PVC?) that I would slide over the lower half of the transfer line, and have
that sleeve connected to tygon tubing that would feed back into the recovery
manifold. Once the line is cooled, the sleeve should easily slide off the
transfer line (in theory).
Any thoughts? Anyone have a system that works for them?
Thanks!
Anne
_______________________
Anne Rachupka
NMR Director
University of New Mexico, Albuquerque, NM
Dept. of Chemistry and Chemical Biology
505-277-4031
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Received on Wed Jun 18 2025 - 10:00:14 MST