[Dsg-mvt] News about relief valves

mdefurne mdefurne at jlab.org
Wed Jul 19 14:58:10 EDT 2017


Thank you Marc,

Maxime


Le 19/07/2017 à 14:55, Marc McMullen a écrit :
> Matt is the DA, this system is already connected, no approval is 
> needed. I'll turn on the Argon now (2psi).
>
>
> On 7/19/2017 2:45 PM, mdefurne wrote:
>> We are ready to switch to Argon. So if you can do it this afternoon 
>> or tomorrow morning, that would be great.
>>
>> Also can you send me the name of the DA for the relief valve? Is it 
>> Matt Marchlik? If it could be approved quickly, again, that would be 
>> great for our future test.
>>
>> Thank you Marc,
>>
>> Have a good day,
>>
>> Maxime
>>
>>
>> Le 19/07/2017 à 14:31, Marc McMullen a écrit :
>>> Hi Maxime,
>>>
>>> Just let me know when to turn on the gas.
>>>
>>> Marc
>>>
>>>
>>> On 7/19/2017 2:29 PM, mdefurne wrote:
>>>> Hi Marc,
>>>>
>>>> Apparently the minimal pressure at the entrance of the gas rack 
>>>> should be 50 mbar above atmospheric pressure. At the exit of the 
>>>> bottle, it should then be more, about ~100 mbar.
>>>> However, as long as we have these leaks on the relief valve we 
>>>> would like to stop running with premix. It is precious since there 
>>>> are only three bottle left (or four?). And we need to keep one for 
>>>> the new tiles coming this fall before installation. So not that 
>>>> much left to do all the test we need.
>>>>
>>>> We took a look inside the MVT checking all the tube connections for 
>>>> a leak and we did not find any of them suspicious. Is it possible 
>>>> to switch to Argon in order to use the sniffer to check all the 
>>>> connections?
>>>>
>>>> Thank you,
>>>>
>>>> Maxime
>>>>
>>>> Le 18/07/2017 à 11:08, Marc McMullen a écrit :
>>>>> Hi Maxime,
>>>>>
>>>>> We have tested the relief valves and found that they both leak. We 
>>>>> will work with the Matt to find an economical solution to these 
>>>>> type of vavles.
>>>>>
>>>>> In the mean time, what is the minimum required pressure for the 
>>>>> premix to your system. The loss can be managed until a better 
>>>>> solution can be acquired.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Marc
>>>>>
>>>>>
>>>>> On 7/18/2017 10:49 AM, mdefurne wrote:
>>>>>> Hi Marc,
>>>>>>
>>>>>> What are the news concerning the relief valves? Did you replace 
>>>>>> them?
>>>>>>
>>>>>> Have a good day,
>>>>>>
>>>>>> Maxime
>>>>>>
>>>>>
>>>>
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>>>
>>
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