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<p class="MsoNormal"><span style="color:black">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">SITEK does offer a new controller called SLICK ONE, this does have a setting to shut off the N2 purge. The new controllers are really nice also, they allow easy troubleshooting and programming.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:9.0pt;color:#1F497D">Mark R. April</span></b><span style="font-size:8.0pt;font-family:"Cambria",serif;color:#1F497D"><br>
</span><span style="font-size:9.0pt;color:#1F497D">Senior Equipment Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:#1F497D">Microfabrication Laboratory
<br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:black;letter-spacing:1.2pt"><img width="175" height="26" style="width:1.8229in;height:.2708in" id="Picture_x0020_2" src="cid:image001.png@01D9684B.91C31F20" alt="color_logo_small4"></span><i><span style="font-size:9.0pt;color:#1F497D"><br>
555 Technology Square<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;color:#1F497D">Cambridge, MA 02139<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;color:#1F497D"><a href="mailto:mapril@draper.com"><span style="color:#0563C1">mapril@draper.com</span></a>
<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;color:#1F497D">O # 617-258-1613 C # 617-455-1596<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;color:#1F497D"><a href="http://www.draper.com/"><span style="color:#0563C1">www.draper.com</span></a></span></i><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> <b>
On Behalf Of </b>Kyle Keenan<br>
<b>Sent:</b> Wednesday, April 5, 2023 4:47 PM<br>
<b>To:</b> Nathan Nelson - Fitzpatrick <nnelsonfitzpatrick@uwaterloo.ca><br>
<b>Cc:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [EXTERNAL] Re: [labnetwork] N2 consumption by SRDs<o:p></o:p></p>
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<b><span style="color:#222222">CAUTION:</span></b><span style="color:#222222"> This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.
<o:p></o:p></span></p>
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<p class="MsoNormal">Hi Nathan,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm surprised to hear that they have a constant N2 purge. This seems very odd to me. Stating the obvious, here, but can't Sitek reconfigure them? We've had (very old) Verteq Superclean SRD's and now RENA Compass SRD's, and neither type
had a constant N2 purge.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Kyle<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, Apr 5, 2023 at 4:15 PM Nathan Nelson - Fitzpatrick <<a href="mailto:nnelsonfitzpatrick@uwaterloo.ca">nnelsonfitzpatrick@uwaterloo.ca</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi labnetwork,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">My lab is going through a process of auditing our Nitrogen use, and an early target for saving on N<sub>2</sub> are our spin rinse dryers.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We have four Sitek SRDs which are configured to continuously purge with N<sub>2</sub> and to run occasionally (on a timer) to exercise the SRDs and run some DI water through them.
The constant N2 purge obviously consumes a ton of N<sub>2</sub>.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">We’re considering either:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<ul type="disc">
<li class="m-5751207388988767688msolistparagraph" style="mso-list:l0 level1 lfo1">
Purchasing an (expensive) valve from Sitek that would cut off N<sub>2</sub> flow when the SRD controllers are off. We would then leave the SRD controllers off when they are not enabled by our lab users.<o:p></o:p></li><li class="m-5751207388988767688msolistparagraph" style="mso-list:l0 level1 lfo1">
Or we might consider setting up an interlock to drive a solenoid valve that would cut off N<sub>2</sub> flow to the SRDs when they are not enabled in our lab management software.<o:p></o:p></li></ul>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m wondering what other interesting solutions people have fashioned to reduce N<sub>2</sub> consumption by SRDs?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I’m also curious if there are any pitfalls we should look out for when pursuing something like this?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Many thanks in advance,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> -Nathan<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Times New Roman",serif">-- </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Nathan Nelson-Fitzpatrick PhD, PEng (He/Him)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Director, Quantum-Nano Fabrication and Characterization Facility (QNFCF)</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">Office of Research</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">University of Waterloo</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">200 University Avenue West, Waterloo, ON N2L 3G1</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">P: 519-888-4567 ext. 31796</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif;color:black">C: 226-218-3206</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><a href="https://urldefense.com/v3/__https:/uwaterloo.ca/quantum-nano-fabrication-and-characterization-facility/__;!!IBzWLUs!T8PC5-A25plwFv8OVmNvllNdSvKRgMR3IZ7Uqa8wriIGD70Ss_OlZtLE_gGeHoV1YsZKQkIK2pDI8eebEKZad3OVmt7KUGceGrTq$" target="_blank"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">https://uwaterloo.ca/quantum-nano-fabrication-and-characterization-facility/</span></a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
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<a href="https://urldefense.com/v3/__https:/mtl.mit.edu/mailman/listinfo.cgi/labnetwork__;!!IBzWLUs!T8PC5-A25plwFv8OVmNvllNdSvKRgMR3IZ7Uqa8wriIGD70Ss_OlZtLE_gGeHoV1YsZKQkIK2pDI8eebEKZad3OVmt7KUAPD744v$" target="_blank">https://urldefense.com/v3/__https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork__;!!IBzWLUs!T8PC5-A25plwFv8OVmNvllNdSvKRgMR3IZ7Uqa8wriIGD70Ss_OlZtLE_gGeHoV1YsZKQkIK2pDI8eebEKZad3OVmt7KUAPD744v$</a>
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<br>
<span class="gmailsignatureprefix">-- </span><o:p></o:p></p>
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<p class="MsoNormal">Kyle Keenan<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Senior Manager - Laboratory Operations<o:p></o:p></p>
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<p class="MsoNormal">Quattrone Nanofabrication Facility<o:p></o:p></p>
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<p class="MsoNormal">University of Pennsylvania<o:p></o:p></p>
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<p class="MsoNormal">P: 215-898-7560<o:p></o:p></p>
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<p class="MsoNormal">F: 215-573-4925<o:p></o:p></p>
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