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 toflush 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 Tue Jun 17 2025 - 18:40:25 MST