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<p class="MsoNormal">Hi Joseph – <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">That does seem like a lot of N2. Are you supposed to include any N2 purge from the pump in those numbers. For example, an Edwards iQDP80 will typically have a ~ 50SLM purge, so in the case of the 3 CFM purge requirement, it’s only an
additional 30-40 SLM (1-1.5 CFM). All that N2 is going to flow through into the Callisto.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also, if you are abating a process that requires passivation of the abatement column, that does often require extra N2, so perhaps that where the higher levels are coming from. To be clear, that should process dependent and not always
necessary to the best of my knowledge.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My experience with dry abatement using granulate (I believe this how Callisto work) is that there is also an upper limit on N2 as well where too much Nitrogen reduces the residence time of the effluent within the cannister, making the abatement
less effective.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There are other options for dry abatement if you are looking for something with lower N2 consumption.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">Rob Breisch</span></b><b><span style="font-size:12.0pt;color:navy"><br>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:#003300"> Trillium US<o:p></o:p></span></b></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">This transmission is intended for the named addressee(s) only and may contain confidential and privileged information. Reading, copying or disseminating this transmission by anyone other than
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<p class="MsoNormal"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> <b>
On Behalf Of </b>Joseph Losby<br>
<b>Sent:</b> Friday, September 15, 2023 11:33 AM<br>
<b>To:</b> labnetwork@mtl.mit.edu<br>
<b>Subject:</b> [labnetwork] Jupiter Callisto abatement system N2 usage<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">Hi everyone, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">According to Critical Systems inc., 18 CFM (7 CFM emergency purge, 3 CFM normal purge, 8 CFM venturi pump) of N2 should be allocated to the Jupiter Callisto abatement
system. That seems like a lot to allocate to one piece of equipment. Do any of you have any experience with them, and is this N2 usage realistic? Is there a situation where the normal and emergency purges kick in at the same time? <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">Cheers,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Aptos",sans-serif;color:black">Joe<o:p></o:p></span></p>
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<p style="background:white"><b><span style="font-size:10.0pt;color:#D6001C">Joe Losby, PhD</span></b><span style="font-size:10.0pt;color:#D6001C"><br>
</span><span class="contentpasted0"><span lang="EN-CA" style="font-size:10.0pt;color:black">Manager, qLab Operations</span></span><span style="font-size:9.0pt;color:black"><o:p></o:p></span></p>
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<span lang="EN-CA" style="font-size:10.0pt;color:black"><br>
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