Re: [AMMRL] Helium Transfer Lines - Refreshing vacuum. #poll-notice

From: Alex Paterson via groups.io <alpaterson=wisc.edu_at_groups.io>
Date: Thu, 31 Jul 2025 17:40:22 +0000

Hi Alvaro,

Ours is very similar to Todd’s. Also attached is a picture of the
quick connect hose we use to switch between lines. The quick connect fitting
on the vacuum port tool is obscured by my hand, but it’s the same
as the one on the hose.

Best,
Alex

> From: main_at_ammrl.groups.io On Behalf Of Todd Rappe via groups.io
> Sent: Thursday, July 31, 2025 12:33 PM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] Helium Transfer Lines - Refreshing vacuum. #poll-notice


_____________________________________
Todd Rappe
Minnesota NMR Center <nmr.umn.edu>
612-625-9147 (office)
651-321-TODD (rings office and mobile)
612-624-8892 (magnet lab)


On Thu, Jul 31, 2025 at 12:25 PM Alvaro Herrera via groups.io wrote:

Anyone has picture of those "pieces" I would like to see if we have some.

Thanks,


Alvaro Herrera Ph.D.
NMR Center Director
Chemistry & Biochemistry Department
Auburn University

________________________________
> From: main_at_ammrl.groups.io on behalf of Kenneth Sharp-Knott via groups.io
> Sent: Wednesday, July 30, 2025 11:26 AM
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] Helium Transfer Lines - Refreshing vacuum. #poll-notice

Just to follow-up... The reason I ask is the engineer mentioned that most
eople wait far too long. By the time you see evidence of it having gone
soft, you have likely been losing quite a bit of helium due to excessive
boiloff for some time.

Apparently most transfer lines also come with the necessary equipment to pump
it down. They were some of the bit and pieces lying around the lab that I
had no idea of the purpose.



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#2646): https://urldefense.com/v3/__https://ammrl.groups=
.io/g/main/message/2646__;!!PvDODwlR4mBZyAb0!TZ8D2rhHCyfsjsdjJw97Onp9-NFrpj=
lH40LnJrq935EyoJQivIYB1nwLXxbgpRhDqyJ1RxF_H8gu8CvrJpUqP4ZV7TyW$
Mute This Topic: https://urldefense.com/v3/__https://groups.io/mt/114451451=
/7559972__;!!PvDODwlR4mBZyAb0!TZ8D2rhHCyfsjsdjJw97Onp9-NFrpjlH40LnJrq935Eyo=
JQivIYB1nwLXxbgpRhDqyJ1RxF_H8gu8CvrJpUqP4w3sSH2$
Mute #poll-notice:https://urldefense.com/v3/__https://ammrl.groups.io/g/mai=
n/mutehashtag/poll-notice__;!!PvDODwlR4mBZyAb0!TZ8D2rhHCyfsjsdjJw97Onp9-NFr=
pjlH40LnJrq935EyoJQivIYB1nwLXxbgpRhDqyJ1RxF_H8gu8CvrJpUqPypN55CX$
Group Owner: main+owner_at_ammrl.groups.io
-=-=-=-=-=-=-=-=-=-=-=-








Received on Thu Jul 31 2025 - 11:38:19 MST