We have multiple cryoprobes that unfortunately use air cooled compressors.
One of our Sumitomo outdoor units recently shutdown. When I removed the
cover the pan under the helium capsule was full of oil. This is not
surprising given the age of the unit (~75,000 hours) and the fine Georgia
summertime environment in which it resides. We are lucky in that we
just replaced FA-70 units on our He liquefication system and I have an old
one sitting around that was running when it was disconnected last month.
I want to swap it for the blown unit but do not know if when a helium capsule
blows, does it contaminate other parts of the system with oil.
Does anyone know if this is the case?
Thanks,
John
John Grimes
NMR Facility Manager
Complex Carbohydrate Research Center
University of Georgia
315 Riverbend Road, Athens, GA 30602
jgrimesjr_at_uga.edu
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Received on Tue Jul 29 2025 - 08:28:13 MST