<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'><div>Hi Kristin,</div><div><br></div><div>In my experience owning your own tanks is vastly superior to the half destroyed trash companies like to deliver. I've never had ongoing problems w/ tanks we own (same for the local cryo facilities who own numerous tanks). I like the c-stic for level measurement too (http://cryopurecorp.com/cryogenic-equipment/c-stic-cryo-level-gauge.html). <br></div><div><br></div><div>Like Craig, I've also been very interested in a quiet relief valve and would love to know if anyone has used a Whisper or something else.<br></div><div><br></div><div>Kind Regards,<br></div><div>Duncan<br></div><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Kristin Parent" <kparent@msu.edu><br><b>To: </b>"3dem" <3dem@ncmir.ucsd.edu><br><b>Sent: </b>Tuesday, January 28, 2020 2:45:15 PM<br><b>Subject: </b>[3dem] issues with liquid nitrogen tanks<br><br>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hello fellow 3dem-ers,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We are experiencing quite an annoying situation with Airgas and I am wondering if other folks have had similar problems and what potential solutions are.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We have a custom manifold from Chart to deliver liquid nitrogen to our Talos Arctica that can be equipped with two 240L tanks, each with 22 psi pressure. This should help reduce the LN2 waste and be more efficient,
and when our tanks are good, it really is amazing. BUT, some of the time Airgas gives us tanks that we cannot use as the pressure never builds beyond 10 psi and we have to return full tanks. They are not the nicest about this either
</span><span style="font-size:11.0pt;font-family:"Apple Color Emoji"">☹</span><span style="font-size:11.0pt"></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We know the manifold is working correctly, and that it is caused by individual bad tanks. Has anyone else had crappy tanks? Do people just buy their own tanks and have them refilled instead of swapped?</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Unfortunately, in Michigan Airgas is our only option, so any help would be appreciated.
</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks in advance, </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Kristin </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-- </span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;color:black">Kristin N. Parent, PhD</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">JK Billman, Jr., MD Endowed Research Professor</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">Director, MSU Cryo-EM</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;color:black">Associate Professor of Biochemistry and </span><span style="font-size:8.0pt;color:black">Microbiology</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:black">Michigan State University</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:black">603 Wilson Rd</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:black">East Lansing, MI 48824</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;color:black">Phone: 517-432-8434</span><span style="color:black"></span></p>
<p class="MsoNormal"><span style="color:black"><a href="https://kparentlab.natsci.msu.edu/" target="_blank"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#954F72">https://kparentlab.natsci.msu.edu/</span></a></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:black">Twitter: @Phage4Lyfe</span><span style="color:black"></span></p>
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