[Dsg-ft] [Dsg-mvt] MVT mixing system - Lite Version

[Marc McMullen]

Hi Matt,

Attached is a photo of the relief valve connections.

Thanks,

Marc


On 6/7/2017 1:01 PM, Brian Eng wrote:
> Hi Stephan,
>
> Since we couldn't find a suitable replacement relief valve on-site we've replaced the bad one with 2 identical ones in parallel per Matt's approval.
>
> We have a DSG meeting after lunch, but after you guys use your Argon leak checker let us know if there's any problems with the current setup.
>
> Matt, I don't know if you need to do anything prior to them flowing gas again?
>
> Thanks
> --
> Brian Eng
> Detector Support Group
> 757-269-6018
>
>> On Jun 7, 2017, at 10:37 AM, Aune Stephan <stephan.aune at cea.fr> wrote:
>>
>> Hi
>> An answer on the need for the “lite system”: it will work fine for MVT.
>>
>> Knowing a Pure isobutene bottle will last more than a 3 month run, check on the remaining weight  on manual scale (no pressure measurement possible) will have to be done ~ monthly. And the bottle could be exchanged between run.
>>
>> We have another issue to solve here and now.
>>
>> Yesterday morning we saw that the Argon bottle we use in Eel was empty. We have been using for our test less than 10 l/h since we arrived (we qualify our detector when leak is under 0.05 l/h !) , and only day time. Thus less than 500 l have been used but the bottle (10 000 l) is already empty.
>>
>> We, Saclay team, found the leak (~ 50 l/h) this morning. It is outside on the pressure release valve. The same leak we had found 15 months ago on MVT B2. The Eel gas system was not done properly and not tested either, which is surprising considering the amount of safety paperwork we on the other end have to go through to turn anything on.
>>
>> Bob gave instruction to solve it. I do not want to waste isobutene premix with such a leak.
>>
>> Stephan
> _______________________________________________
> Dsg-ft mailing list
> Dsg-ft at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-ft

-- 
Marc McMullen
Detector Support Group
757-269-7738

-------------- next part --------------
A non-text attachment was scrubbed...
Name: MVT RV setup.JPG
Type: image/jpeg
Size: 119032 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_ft/attachments/20170607/5ff26474/attachment-0002.jpe>