Hello Sebastian,
We had exactly the same quench valves on a couple of magnets here. Bruker
has an upgrade they can provide for helium recovery. It is spring loaded to
make sure they stay seated. The old style you have will always become loose
after a helium refill.
Perry.
--
Perry J. Pellechia
Director of NMR Services
Research Professor
University of South Carolina
Department of Chemistry and Biochemistry
> On May 12, 2023, at 8:34 AM, Sebastian Kemper via groups.io <sebastian.kemper=3Dtu-berlin.de_at_groups.io> wrote:
>
> Dear colleagues,
>
> I am currently checking my helium recapture system and found out, that a
> very old Oxford magnet in our system is not contributing at all to our helium
> recovery. With a helium sniffer we could narrow it down to the quench ball
> valve (see picture). This valve can be triggered very easily and I am wondering,
> if it can be sealed at all with some grease and a new O-ring. Therefore, it
> would be great to hear your expertise to this ball valve:
> Did you have such a ball valve (exactly the same) and running a helium
> recapture/recovery system?
> If yes, how did you manage to get it not leaking?
> Does anybody know if there are other quench valves on the market which you
> can install at this connection or which can be installed between the backpressure
> valve and the magnet?
>
> Best regards,
> Sebastian
>
> TU Berlin
>
>
> <image001.jpg>
>=20
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Received on Fri May 12 2023 - 07:29:12 MST