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I think we would be better off making the N2 backup system ourselves, once we have the box in house.. We can then interlock backup N2 flow in case of high humidity and add remote alarms. etc.<br>
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<div>-- <br>
George Jacobs<br>
<span style="font-family:"Times New Roman",Times,serif">Jefferson Lab (TJNAF)</span><br>
<span style="font-family:"Times New Roman",Times,serif">STE 12</span><br>
<span style="font-family:"Times New Roman",Times,serif">12000 Jefferson Ave.</span><br>
<span style="font-family:"Times New Roman",Times,serif">Newport News, VA 23606</span><br>
<span style="font-family:"Times New Roman",Times,serif">(office) 757-269-7021</span><br>
<span style="font-family:"Times New Roman",Times,serif">(email) jacobsg@jlab.org</span></div>
<div><span style="font-family:"Times New Roman",Times,serif">(url) https://userweb.jlab.org/~jacobsg<br>
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<div id="divRplyFwdMsg" dir="ltr"><font style="font-size: 11pt;" face="Calibri, sans-serif" color="#000000"><b>From:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Friday, January 22, 2021 8:01 AM<br>
<b>To:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it>; George Jacobs <jacobsg@jlab.org><br>
<b>Cc:</b> dsg-hallb_rich@jlab.org <dsg-hallb_rich@jlab.org><br>
<b>Subject:</b> Re: [dsg-hallb_rich] [EXTERNAL] Re: auto-flow N2 rotameter no longer available on new dry cabinet</font>
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Hi Marco,</div>
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The large dry cabinet does have the nitrogen connection, but the three small ones do not. </div>
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You are correct that the N2 connection would only be used as a backup if the cabinet fails. </div>
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I’ve emailed Super Dry again to see about any different options, but have yet to get a response beyond that they are looking into it. </div>
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-Tyler</div>
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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-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Sent:</b> Friday, January 22, 2021 4:04:31 AM<br>
<b>To:</b> George Jacobs <jacobsg@jlab.org><br>
<b>Cc:</b> dsg-hallb_rich@jlab.org <dsg-hallb_rich@jlab.org><br>
<b>Subject:</b> [dsg-hallb_rich] [EXTERNAL] Re: auto-flow N2 rotameter no longer available on new dry cabinet</font>
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<div class="x_PlainText">Hi everybody,<br>
just to understand the point, as far as I know in the old dry cabinets <br>
we don't have this option and we don't plan to use it in the new cabinet <br>
in normal operation, but only as a backup solution in case of failures. <br>
Is it correct?<br>
If so, in my view it is good to have but strictly speaking not <br>
necessary, and I would choose the option that minimizes the delivery <br>
time, because we have a lot of aerogel on hold in Russia ready to be <br>
shipped.<br>
Best regards,<br>
Marco<br>
<br>
<br>
<br>
<br>
Il 2021-01-22 00:50 George Jacobs ha scritto:<br>
> yes, under $200<br>
> <br>
> --<br>
> George Jacobs<br>
> Jefferson Lab (TJNAF)<br>
> STE 12<br>
> 12000 Jefferson Ave.<br>
> Newport News, VA 23606<br>
> (office) 757-269-7021<br>
> (email) jacobsg@jlab.org<br>
> (url) <a href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a><br>
> <br>
> -------------------------<br>
> <br>
> FROM: dsg-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of<br>
> Amrit Yegneswaran <yeg@jlab.org><br>
> SENT: Thursday, January 21, 2021 5:11 PM<br>
> TO: dsg-hallb_rich@jlab.org <dsg-hallb_rich@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> tyler,<br>
> as discussed on the phone , it appears to be a bait and switch!<br>
> ask him for a quote with the auto flow option.<br>
> let's see how much the genius wants<br>
> <br>
> solenoid valves are about $50 - $100 + change for fittings and tubing<br>
> ~ $200 tops<br>
> right george?<br>
> <br>
> later<br>
> amrit<br>
> <br>
> -------------------------<br>
> <br>
> FROM: dsg-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of<br>
> Amrit Yegneswaran <yeg@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:47 PM<br>
> TO: dsg-hallb_rich@jlab.org <dsg-hallb_rich@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> thnx<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Tyler Lemon <tlemon@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:46 PM<br>
> TO: Amrit Yegneswaran <yeg@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> Correct, the ones in Hall B open on loss of pressure.<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Amrit Yegneswaran <yeg@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:45:40 PM<br>
> TO: Tyler Lemon <tlemon@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> right so they open on pressure?<br>
> same principle different variables!<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Tyler Lemon <tlemon@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:44 PM<br>
> TO: Amrit Yegneswaran <yeg@jlab.org>; dsg-hallb_rich@jlab.org<br>
> <dsg-hallb_rich@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> Amrit,<br>
> <br>
> They are normally open pneumatic valves that open when the main<br>
> nitrogen supply pressure to RICH is lost.<br>
> <br>
> It would be a similar set up except with a valve held closed by<br>
> applying a voltage rather than a pressure.<br>
> <br>
> -Tyler<br>
> <br>
> Get Outlook for iOS [1]<br>
> -------------------------<br>
> <br>
> FROM: dsg-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of<br>
> Amrit Yegneswaran <yeg@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:41:48 PM<br>
> TO: dsg-hallb_rich@jlab.org <dsg-hallb_rich@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> it is a straightforward setup, i think we use such a set up in one of<br>
> the gas systems we have built.<br>
> <br>
> tyler,<br>
> aren't we using the fails open i.e. normally open solenoid in the<br>
> hall for the present rich.<br>
> for N2 flow in emergency situation, when the main flow stops?<br>
> <br>
> -------------------------<br>
> <br>
> FROM: dsg-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of<br>
> Patrizia Rossi <rossi@jlab.org><br>
> SENT: Thursday, January 21, 2021 4:00 PM<br>
> TO: Tyler Lemon <tlemon@jlab.org>; dsg-hallb_rich@jlab.org<br>
> <dsg-hallb_rich@jlab.org><br>
> SUBJECT: Re: [dsg-hallb_rich] auto-flow N2 rotameter no longer<br>
> available on new dry cabinet<br>
> <br>
> Hi Tyler,<br>
> <br>
> It seems, from George’s email, that it should be quite simple to<br>
> implement a control on the N2 flow. Therefore I am in favour of buying<br>
> the dry cabinet with the standard N2 flow option.<br>
> <br>
> But let’s wait for my colleagues’ opinion as well<br>
> <br>
> patrizia<br>
> <br>
> FROM: dsg-hallb_rich <dsg-hallb_rich-bounces@jlab.org> on behalf of<br>
> Tyler Lemon <tlemon@jlab.org><br>
> DATE: Thursday, January 21, 2021 at 1:50 PM<br>
> TO: "dsg-hallb_rich@jlab.org" <dsg-hallb_rich@jlab.org><br>
> SUBJECT: [dsg-hallb_rich] auto-flow N2 rotameter no longer available<br>
> on new dry cabinet<br>
> <br>
> Hello,<br>
> <br>
> Please see Super Dry's email below.<br>
> <br>
> It turns out that the auto-flow N2 rotameter option for the dry<br>
> cabinet is not available and was offered to us in mistake. Instead,<br>
> Super Dry can offer their standard N2 flow option. The down side of<br>
> this is that it would be a constant N2 purge rather than something<br>
> that can be set to turn on in the event humidity goes higher than<br>
> expected.<br>
> <br>
> As a potential way we can still get this auto-flow capability, we<br>
> could look into designing a valve set up with normally-open valves so<br>
> in the event of a power outage, N2 flow will automatically start.<br>
> <br>
> If the standard N2 connection is okay, I will give the okay to Super<br>
> Dry to move forward. Otherwise, we can have Super Dry remove any N2<br>
> flow option from the order.<br>
> <br>
> -Tyler<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Richard Heimsch <rich@heimsch.com><br>
> SENT: Thursday, January 21, 2021 1:38 PM<br>
> TO: Tyler Lemon <tlemon@jlab.org><br>
> SUBJECT: [EXTERNAL] MSD PO<br>
> <br>
> Hi Tyler,<br>
> <br>
> I received the purchase order today but discovered that I made a<br>
> mistake in quoting you the auto flow nitrogen option. It is no longer<br>
> available on that machine, and there was internal miscommunication<br>
> here about it’s availability since my original quote in November.<br>
> <br>
> However, I can provide the regular N2 flow option which is<br>
> considerably less expensive, and since you explained that it is being<br>
> purchased only to have a back up for emergencies, it will be very<br>
> suitable for that purpose.<br>
> <br>
> I can confirm the order with the alternative part number and price<br>
> and return it to Jami And copy you.<br>
> <br>
> Is that a satisfactory solution for you?<br>
> <br>
> Richard Heimsch<br>
> Super Dry<br>
> “More than just Dry Air”<br>
> 512-308-9700<br>
> Austin, 78602<br>
> Zwolle, 8013 NL<br>
> <br>
> <br>
> <br>
> Links:<br>
> ------<br>
> [1] <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_o0ukef&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ry65GV1L9CI4W-wouYF1Yh0O9PuhLc4ZWUkBi_Op2h8&m=9SZeyj888AaDR87jCDTYq6xVgup8tx2Zk9YjaIRKCmI&s=pqWLL6Ebl6ZQhi0pYaqr7VOxaxHBfkyfUX6wEZxlEUk&e=">
https://urldefense.proofpoint.com/v2/url?u=https-3A__aka.ms_o0ukef&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=Ry65GV1L9CI4W-wouYF1Yh0O9PuhLc4ZWUkBi_Op2h8&m=9SZeyj888AaDR87jCDTYq6xVgup8tx2Zk9YjaIRKCmI&s=pqWLL6Ebl6ZQhi0pYaqr7VOxaxHBfkyfUX6wEZxlEUk&e=</a>
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