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<p style="margin-top:0;margin-bottom:0">Hello George,</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Can you send Bob Miller and Bill Crahen the drawing, pressure systems numbers and any other documentation you have on the RICH N2 automatic back up?</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Bill will be the DA for it.<br>
</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Best regards,</p>
<p style="margin-top:0;margin-bottom:0">Tyler<br>
</p>
<br>
<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Bob Miller <rmiller@jlab.org><br>
<b>Sent:</b> Friday, December 14, 2018 9:25 AM<br>
<b>To:</b> Tyler Lemon<br>
<b>Cc:</b> Bill Crahen; Amrit Yegneswaran<br>
<b>Subject:</b> Fwd: Re: [Dsg-rich] RICH N2 system automatic backup</font>
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<p>Hi Tyler,</p>
<p><br>
</p>
<p>Please send the drawings, pressure systems number, and whatever documentation you have to Bill Crahen and myself.</p>
<p><br>
</p>
<p>Bill will be the DA on this project.</p>
<p><br>
</p>
<p>Regards,</p>
<p>Bob<br>
</p>
<div class="x_moz-forward-container"><br>
<br>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Subject: </th>
<td>Re: [Dsg-rich] RICH N2 system automatic backup</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Wed, 12 Dec 2018 19:39:33 -0500</td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Amrit Yegneswaran <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:yeg@jlab.org" id="LPlnk406820" previewremoved="true">
<yeg@jlab.org></a></td>
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<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td>Marco Contalbrigo <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:mcontalb@fe.infn.it" id="LPlnk22469" previewremoved="true">
<mcontalb@fe.infn.it></a>, Patrizia Rossi <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:rossi@jlab.org" id="LPlnk718032" previewremoved="true">
<rossi@jlab.org></a>, Bob Miller <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:rmiller@jlab.org" id="LPlnk5137" previewremoved="true">
<rmiller@jlab.org></a></td>
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<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">CC: </th>
<td>dsg-rich <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:dsg-rich@jlab.org" id="LPlnk700658" previewremoved="true">
<dsg-rich@jlab.org></a></td>
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<br>
<br>
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<p style="margin-top:0; margin-bottom:0">bob,</p>
<p style="margin-top:0; margin-bottom:0">please assign a design authority for the analysis and approval of the system.</p>
<p style="margin-top:0; margin-bottom:0">thanks <br>
</p>
<p style="margin-top:0; margin-bottom:0">amrit<br>
</p>
<br>
<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Dsg-rich
<a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:dsg-rich-bounces@jlab.org" id="LPlnk967199" previewremoved="true">
<dsg-rich-bounces@jlab.org></a> on behalf of Marco Contalbrigo <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:mcontalb@fe.infn.it" id="LPlnk455803" previewremoved="true">
<mcontalb@fe.infn.it></a><br>
<b>Sent:</b> Wednesday, December 12, 2018 3:33 PM<br>
<b>To:</b> Patrizia Rossi<br>
<b>Cc:</b> dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup</font>
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<div class="x_BodyFragment"><font size="2"><span style="font-size:11pt">
<div class="x_PlainText">Dear Tyler,<br>
thank to DSG for this nice upgrade!<br>
Marco.<br>
<br>
On Wed, 12 Dec 2018, Patrizia Rossi wrote:<br>
<br>
> Very appreciated Christmas gift!! Thank you Tyler and DSG people!!<br>
> Patrizia <br>
> <br>
> Sent from my iPhone<br>
> <br>
> On Dec 12, 2018, at 3:13 PM, Tyler Lemon <a class="x_moz-txt-link-rfc2396E OWAAutoLink" href="mailto:tlemon@jlab.org" id="LPlnk671870" previewremoved="true">
<tlemon@jlab.org></a> wrote:<br>
><br>
> Hello,<br>
> <br>
><br>
> DSG has developed a system to automatically switch RICH to a back up<br>
> bank of nitrogen in the event that Hall B's main nitrogen supply is<br>
> stopped.<br>
> <br>
><br>
> The system is designed to use a pneumatic valve operated using the<br>
><br>
> pressure from the main N2 supply line that will open if that supply<br>
> pressure drops. The open pneumatic valve will then allow N2 to flow to<br>
> RICH from a bank of nitrogen bottles. Attached is a revised RICH<br>
> nitrogen system diagram showing the new automatic switch-over<br>
> components.<br>
> <br>
><br>
> George has assembled the new components and DSG would like to test them<br>
> at the beginning of next year after the holidays. To be able to do any<br>
> sort of testing, the components and test procedure will need to undergo<br>
> a pressure systems analysis by a Design Authority (DA).<br>
> <br>
><br>
> DSG will provide the necessary documentation to the DA once one is<br>
> requested and assigned.<br>
> <br>
><br>
> Best regards,<br>
><br>
> Tyler<br>
><br>
> <RICH-N2-valve panel-REV2..pdf><br>
><br>
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