<html><body><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900"><div>hi sandro </div><div>george's suggestion is good.<br></div><div>also, i wanted to know how many orifices (and their diameters) are there along the air distribution manifold?<br data-mce-bogus="1"></div><div>amrit<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"George Jacobs" <jacobsg@jlab.org><br><b>To: </b>"Sandro Tomassini" <sandro.tomassini@lnf.infn.it>, dsg-rich@jlab.org, "Bob Miller" <rmiller@jlab.org>, "Matt Marchlik" <marchlik@jlab.org><br><b>Cc: </b>"Amrit Yegneswaran" <yeg@jlab.org>, "Patrizia Rossi" <rossi@jlab.org><br><b>Sent: </b>Thursday, September 21, 2017 1:22:42 PM<br><b>Subject: </b>Re: [Dsg-rich] RICH air cooling pressure system update - Supply Lines and Internal Air Distribution Manifolds<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">Hi Sandro,<br> <br> I think the simplest solution is to replace the metric tubing with 1/2" OD nylon tubing to route the air from the patch panel to the air distribution manifold. Then use 1/2" SS tube for the manifolds. These materials are in house.<br> <br> George<br> <br><div class="moz-cite-prefix">On 9/21/2017 11:02 AM, Sandro Tomassini wrote:<br></div><blockquote cite="mid:b2d20f09-4ac5-2b2a-ea7b-bfe2c6f0da7d@lnf.infn.it"><p>Hi Jeorge,</p><p>you mentioned the two 10 mm ID internal supply lines and distribution manifolds internal to the detector, unfortunately the OD for these lines is 10 mm and not the ID.</p><p>Best regards</p><p>Sandro<br></p><br><div class="moz-cite-prefix">Il 21/09/2017 16:54, George Jacobs ha scritto:<br></div><blockquote cite="mid:933c2230-14c6-769c-8168-02085e306858@jlab.org">Hi Bob,<br> <br> The RICH air cooling pressure system does not include the air supply line from the valve panel to the RICH or the distribution manifolds inside the electronics module installed inside the RICH. Pressure in the internal distribution manifold could be as high as 60 psi at full design air flow. Assuming a worse case scenario of the supply pressure regulator failure, it could be as high as 90 psi.<br> <br> Plan is to run two 1" OD, 0.813" ID nylon tubes from the panel to the detector, L=60 ft each, to supply the two 10 mm ID internal supply lines and distribution manifolds internal to the detector, L=16 ft each. see attached diagram.<br> <br> The distribution manifold was designed by INFN and produced by a 3D printer. These manifolds are questionable at best. I have suggested that these be replaced with a section of SS tubing that has the 2mm holes, orifices, drilled in it.<br> <br> The 1" OD Nylotube is rated at 230 psi. The 10mm ID tubing and 10mm SS tubing are rated > 120 psi. All components have pressure rating greater than the worse case failure scenario.<br> <br> Due to the accelerated schedule, we should quickly determine a way forward to complete any remaining pressure system requirements.<br> <br> Thanks,<br> George<br><pre class="moz-signature">--
George Jacobs
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STE 12
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Dr. Eng. Sandro Tomassini
Istituto Nazionale di Fisica Nucleare
Laboratori Nazionali di Frascati
---Research Division---
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George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org" target="_blank" data-mce-href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg" target="_blank" data-mce-href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a><br data-mce-bogus="1"></pre><br></div></div></body></html>