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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.<br>
<pre class="moz-signature" cols="72">iulian Codreanu, Ph.D.
Director of Operations, UD NanoFab
163 ISE Lab
221 Academy Street
Newark, DE 19716
302-831-2784
<a class="moz-txt-link-freetext" href="http://udnf.udel.edu">http://udnf.udel.edu</a></pre>
<div class="moz-cite-prefix">On 5/14/2015 4:37 PM, Dennis Schweiger
wrote:<br>
</div>
<blockquote
cite="mid:CAKzi2_NOX1+ReAnydmxcG4n9NixNWVB1nutV_-Xcq-mdGqM4nA@mail.gmail.com"
type="cite">
<div dir="ltr">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.
<div><br>
</div>
<div>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.</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div class="gmail_signature">
<div>Dennis</div>
<div> </div>
<div>734.647.2055 Ofc</div>
<div> </div>
<div>"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?</div>
</div>
</div>
<br>
<div class="gmail_quote">On Thu, May 14, 2015 at 4:26 PM,
Matthieu Nannini, Dr. <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:matthieu.nannini@mcgill.ca" target="_blank">matthieu.nannini@mcgill.ca</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">
Dennis,
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Matthieu</div>
<div><br>
<div>
<div>
<div>Le 2015-05-14 à 16:14, Dennis Schweiger <<a
moz-do-not-send="true"
href="mailto:schweig@umich.edu" target="_blank">schweig@umich.edu</a>>
a écrit :</div>
<br>
<blockquote type="cite">
<div dir="ltr">Matthieu,
<div><br>
</div>
<div>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?</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>
<div>DennisSchweiger</div>
<div>University of Michigan/LNF</div>
<div> </div>
<div><a moz-do-not-send="true"
href="tel:734.647.2055"
value="+17346472055" target="_blank">734.647.2055</a>
Ofc</div>
<div> </div>
<div>"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?</div>
</div>
</div>
<br>
<div class="gmail_quote">On Thu, May 14, 2015
at 1:02 PM, Matthieu Nannini, Dr. <span
dir="ltr">
<<a moz-do-not-send="true"
href="mailto:matthieu.nannini@mcgill.ca"
target="_blank">matthieu.nannini@mcgill.ca</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">Collegues,
<div><br>
</div>
<div>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: <a
moz-do-not-send="true"
href="http://www.halogenvalve.com/"
target="_blank">http://www.halogenvalve.com/</a></div>
<div>These valves would be hooked up to
our TGMS.</div>
<div><br>
</div>
<div>Any of you has such an installation
? Anyone could comment ?</div>
<div><br>
</div>
<div>Thanks</div>
<br>
<div><span
style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<div style="word-wrap:break-word"><span
style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">
<div
style="word-wrap:break-word">-----------------------------------
<div>Matthieu Nannini<br>
McGill Nanotools Microfab<br>
Manager<br>
t: <a
moz-do-not-send="true"
href="tel:514%20398%203310"
value="+15143983310"
target="_blank">514 398
3310</a><br>
c: <a
moz-do-not-send="true"
href="tel:514%20758%203311"
value="+15147583311"
target="_blank">514 758
3311</a><br>
f: <a
moz-do-not-send="true"
href="tel:514%20398%208434"
value="+15143988434"
target="_blank">514 398
8434</a><br>
<a moz-do-not-send="true"
href="http://mnm.physics.mcgill.ca/"
target="_blank">http://mnm.physics.mcgill.ca/</a><br>
------------------------------------</div>
</div>
</span></div>
</span></div>
<br>
</div>
<br>
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