Date: Fri, 12 May 2023 14:18:31 +0000
Hi, Sebastian,
You probably need to push that ball all the way down with your fingers. It probably popped up during a fill event, and stayed in the up position to release excess pressure at the time.
You could also take it apart and add silicone grease to the o-ring inside (I believe there is an o-ring in there). Then, it should seal in the down position. Tighten the ring with your hand.
Dean
***********************************
Dean L. Olson, Ph.D.
Director, NMR/EPR Lab
146 Roger Adams Lab
School of Chemical Sciences
U. of Illinois at Urbana-Champaign
600 S. Mathews, Box 81-5, MC-712
Urbana, IL 61801 USA
Lab: 217-244-0564; Cell: 217-722-9432
dolson_at_illinois.edu<mailto:dolson_at_illinois.edu>
http://scs.illinois.edu/nmr
http://scs.illinois.edu/epr/
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From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Dmitry Pichugin
Sent: Friday, May 12, 2023 7:53 AM
To: main_at_ammrl.groups.io
Subject: Re: [AMMRL] quench ball valve is leaking
I believe there should be a spring up there. It's a very light spring but still useful.
Dmitry
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From: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io> <main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io>> on behalf of Sebastian Kemper via groups.io <sebastian.kemper=tu-berlin.de_at_groups.io<mailto:sebastian.kemper=tu-berlin.de_at_groups.io>>
Sent: Friday, May 12, 2023 8:34:22 AM
To: main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io> <main_at_ammrl.groups.io<mailto:main_at_ammrl.groups.io>>
Subject: [AMMRL] quench ball valve is leaking
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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
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