Dear All,
Regarding 2.2K pumped high field magnets using needle valve control of the cooling.
As I only had experience with the gen II Oxford pumped magnet, do other pumped magnets use a needle valve? Do modern instrument require pumped magnet adjustments?
We used the needle valve to control the cooling of the lower bath at ~ < 2.2K. I’m wondering if anyone has knowledge about “exercising” the needle valves regularly to prevent buildup/contamination from clogging the needle and/or valve itself?
Does anyone excise the range of the valve to maintain the full operation of the valve?
All the best,
Ryan
---------------------------------------------------------------------------------
Ryan T. McKay, Ph.D.
NMR Facility Supervisor
Room E3-17A Email: ryan.mckay_at_ualberta.ca <mailto:ryan_at_nanuc.ca>
Department of Chemistry Phone: 780.492.9950
University of Alberta Cell: 780.920.8871
Edmonton, Alberta
Canada T6G 2G2
Website: uab.ca/nmr
Received on Tue Oct 23 2018 - 06:07:56 MST