Hi Luke,
For the Ultrashield 300, Bruker sells a manifold (Z54230) that connects both
helium exhaust ports together, allowing recovery from both turrets. (At least,
I think it will fit an Ultrashield 300 – it certainly fits our
unshielded 400).
Our recovery system spans 2 buildings and 4 storeys, so we installed 0-3 psi
gauges on the header in each magnet room to confirm we didn’t have
high pressure near the magnets during fills:
https://www.mcmaster.com/4026K16/
That might help pinpoint your issue.
Best,
Sameer
P.S. I agree – the flow meters are not the problem. We usually clamp
off the Tygon during a fill, but once we forgot and there were no ill effects.
--
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
> From: main_at_ammrl.groups.io on behalf of Fulton, Luke via groups.io
> Date: Saturday, April 19, 2025 at 19:19
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Quench narrowly avoided? Filling small magnets connected to helium recovery
Hi all,
Pictures attached as promised. The 300 already had a check valve on the helium
stack before connecting to recovery manifold. The valve on the 600 was added
in preparation for the recovery system. Having the check valve at the exhaust
port led to too much torque on the system. Moving the valve in line with the
manifold and whip relieved the strain.
Copper tubing shown is 1.5".
All flanges on the manifold are KF25. Whip to copper connection is KF40.
The barb hose flange adapters have a smaller ID than intended from a
miscommunication when ordering the parts. As long as the ball valve is
open during fills I don't think it should matter; technically I should
be able to remove the flow meters and seal those two ports without
affecting anything.
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
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Received on Sun Apr 20 2025 - 06:22:55 MST