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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>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Marco Contalbrigo <mcontalb@fe.infn.it><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="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 <tlemon@jlab.org> 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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