[labnetwork] Automated Emergency shutoff valve

[Iulian Codreanu]

I have both the pneumatic cylinder valve (like the one shown in the 
attachment sent by Dennis) and the shutoff valve on the pigtail 
(downstream of the DISS connection).  Both are controlled by the gas 
cabinet/TGMS.

iulian Codreanu, Ph.D.
Director of Operations, UD NanoFab
163 ISE Lab
221 Academy Street
Newark, DE 19716
302-831-2784
http://udnf.udel.edu

On 5/14/2015 4:37 PM, Dennis Schweiger wrote:
> So, your project manager wants to put this rotary valve operator in 
> the cabinet, as a means to shut off the cylinder?  We had those in our 
> early Air Products cabinets, they were problematic, and we eventually 
> just defeated them.  None of our cylinder cabinets have them now.  It 
> would make more sense to go to an air operated DISS cylinder valve 
> (see page 2 in the attachment), and have the DISS portion prepped for 
> a restrictive flow orifice.  In addition to this, I would look at the 
> gas usage, and "right size" the cylinder volume of gas so that your 
> cylinder change out cadence is about 12-18 months.  That might mean 
> that you'd need to have a cylinder short filled.  This reduces your 
> exposure risk in the event there is some type of catastrophic failure 
> in your delivery system.
>
> There is no way I'd add another complex mechanical system (rotating 
> cylinder shut off) into our HPM cabinets, when there are way better 
> solutions out there.
>
> Dennis
> 734.647.2055 Ofc
> "People can be divided into 3 groups - those that make things happen, 
> those that watch things happen, and those that wonder what happened."  
> Within which group do you belong?
>
> On Thu, May 14, 2015 at 4:26 PM, Matthieu Nannini, Dr. 
> <matthieu.nannini at mcgill.ca <mailto:matthieu.nannini at mcgill.ca>> wrote:
>
>     Dennis,
>
>     Yes. All are in exhausted gas cabinet. When I presented the safety
>     mechanism to the project manager here, showing him the shutoff
>     valve in the pigtail just before the panel, he mentioned that
>     there was still a weak point between this valve and the actual
>     cylinder rotary valve itself. If a leak occurs at the rotary valve
>     or the CGA/DISS connection or at the pigtail nothing can stop it.
>     Hence the shutoff valve on the cylinder rotary valve idea from the
>     project manager.
>
>     Matthieu
>
>     Le 2015-05-14 à 16:14, Dennis Schweiger <schweig at umich.edu
>     <mailto:schweig at umich.edu>> a écrit :
>
>>     Matthieu,
>>
>>     are you using gas cabinets to house your HPM cylinders?  If so,
>>     why wouldn't you use the shutoffs in the cabinets to perform this
>>     functionality?
>>
>>     DennisSchweiger
>>     University of Michigan/LNF
>>     734.647.2055 <tel:734.647.2055> Ofc
>>     "People can be divided into 3 groups - those that make things
>>     happen, those that watch things happen, and those that wonder
>>     what happened."  Within which group do you belong?
>>
>>     On Thu, May 14, 2015 at 1:02 PM, Matthieu Nannini, Dr.
>>     <matthieu.nannini at mcgill.ca <mailto:matthieu.nannini at mcgill.ca>>
>>     wrote:
>>
>>         Collegues,
>>
>>         Our facilites dept. is reviewing our operations before a
>>         « used-to-be-not-so-major » renovation. They are flirting
>>         with this idea of installing Emergency Gas Cylinder Valve
>>         shutoff like sold by the following company:
>>         http://www.halogenvalve.com/
>>         These valves would be hooked up to our TGMS.
>>
>>         Any of you has such an installation ? Anyone could comment ?
>>
>>         Thanks
>>
>>         -----------------------------------
>>         Matthieu Nannini
>>         McGill Nanotools Microfab
>>         Manager
>>         t: 514 398 3310 <tel:514%20398%203310>
>>         c: 514 758 3311 <tel:514%20758%203311>
>>         f: 514 398 8434 <tel:514%20398%208434>
>>         http://mnm.physics.mcgill.ca/
>>         ------------------------------------
>>
>>
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>>
>
>
>
>
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