<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1469672073361_3409"><span>Hank,</span></div><div id="yui_3_16_0_ym19_1_1469672073361_3418"><span id="yui_3_16_0_ym19_1_1469672073361_3417">I have a vague memory of either Emile or Carsten talking</span></div><div id="yui_3_16_0_ym19_1_1469672073361_3411" dir="ltr"><span id="yui_3_16_0_ym19_1_1469672073361_3410">about ice forming in an o-ring groove & this caused the acrylic</span></div><div id="yui_3_16_0_ym19_1_1469672073361_3416" dir="ltr"><span id="yui_3_16_0_ym19_1_1469672073361_3462">to crack. I could have this wrong so maybe Emile could comment</span></div><div id="yui_3_16_0_ym19_1_1469672073361_3461" dir="ltr"><span id="yui_3_16_0_ym19_1_1469672073361_3460">he is a bit of an expert with view ports now.</span></div><div id="yui_3_16_0_ym19_1_1469672073361_3463" dir="ltr"><span>Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1469672073361_3419"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1469672073361_3433" style="display: block;"> <div id="yui_3_16_0_ym19_1_1469672073361_3432" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1469672073361_3431" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1469672073361_3430" dir="ltr"> <font id="yui_3_16_0_ym19_1_1469672073361_3429" face="Arial" size="2"> <hr size="1" id="yui_3_16_0_ym19_1_1469672073361_3440"> <b><span style="font-weight: bold;">From:</span></b> hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, July 28, 2016 1:24 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] conical port seal<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1469672073361_3434"><br><div id="yiv6393352339"><div id="yui_3_16_0_ym19_1_1469672073361_3474"><div id="yui_3_16_0_ym19_1_1469672073361_3473" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><div id="yiv6393352339yui_3_16_0_ym19_1_1469668590327_3006"><span>Hi Sean,</span></div><div id="yiv6393352339yui_3_16_0_ym19_1_1469668590327_2978"><span id="yiv6393352339yui_3_16_0_ym19_1_1469668590327_3433">Yes I did email it-- it is actually a picture from the Stichiw book, and is considered an acceptable option. I bet if I read it again I will find the spec for the seal. </span>Personally I like the idea of an o-ring in the port. I always though that was bad, but I would sure prefer that. Today I came across a section in the Stachiw book showing a test sample port with a o-ring groove. It said there was no cracking initiated from the groove because it was close to the high pressure face of the port. Maybe I should chuck her up and machine a grove in it. What do you think about an o-ring.</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469668590327_2978">Hank</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469668590327_2978"><br clear="none"></div> <div class="yiv6393352339qtdSeparateBR" id="yui_3_16_0_ym19_1_1469672073361_3475"><br clear="none"><br clear="none"></div><div class="yiv6393352339yahoo_quoted" id="yui_3_16_0_ym19_1_1469672073361_3479" style="display: block;"> <div id="yui_3_16_0_ym19_1_1469672073361_3478" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div id="yui_3_16_0_ym19_1_1469672073361_3477" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div class="yiv6393352339yqt1869742408" id="yiv6393352339yqt50875"><div id="yui_3_16_0_ym19_1_1469672073361_3476" dir="ltr"><font id="yui_3_16_0_ym19_1_1469672073361_3480" face="Arial" size="2"> On Wednesday, July 27, 2016 7:07 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv6393352339y_msg_container" id="yui_3_16_0_ym19_1_1469672073361_3483"><div id="yiv6393352339"><div id="yui_3_16_0_ym19_1_1469672073361_3482"><div id="yui_3_16_0_ym19_1_1469672073361_3481" dir="ltr">Did you email it? I don't see it.</div>
<div id="yui_3_16_0_ym19_1_1469672073361_3486" dir="ltr">I'd be inclined to stick with the PVHO recommendations (or Stachiw's book) for sealing arrangements. I think there is some discussion of gasket hardness and thickness if using a bearing gasket. I don't recall offhand though. A conical frustum window will probably use an o-ring though.</div>
<div dir="ltr">Sean</div>
<br clear="none"><br clear="none"><div class="yiv6393352339gmail_quote" id="yui_3_16_0_ym19_1_1469672073361_3490">On July 27, 2016 6:27:11 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="yiv6393352339gmail_quote" id="yui_3_16_0_ym19_1_1469672073361_3489" style="margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<div class="yiv6393352339yqt6475544162" id="yiv6393352339yqt51865"><div id="yui_3_16_0_ym19_1_1469672073361_3488" style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><div id="yui_3_16_0_ym19_1_1469672073361_3487">Hi Sean,</div><div id="yui_3_16_0_ym19_1_1469672073361_3491">Did my picture make it? </div><div>Hank</div> <div class="yiv6393352339qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv6393352339yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font face="Arial" size="2"> On Wednesday, July 27, 2016 3:41 PM, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv6393352339y_msg_container"><div id="yiv6393352339"><div><div dir="ltr">Hank - sorry, but a picture is worth a thousand words. Can you post a sketch of your present arrangement?</div>
<div dir="ltr">Sean<br clear="none">
</div>
<br clear="none"><br clear="none"><div class="yiv6393352339gmail_quote">On July 27, 2016 3:10:03 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<blockquote class="yiv6393352339gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<div class="yiv6393352339yqt8007477266" id="yiv6393352339yqt54082"><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><div id="yiv6393352339yui_3_16_0_ym19_1_1469653299816_2651">Hi Sean,</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469653299816_2651" dir="ltr">I am trying decide the simplest way to create my low pressure seal on my conical window. I has a rubber gasket with silicone originally. I did that so when the acrylic compresses the silicone will drag the gasket along for the ride. I don't think it will compress much because it so oversized for the depth. I am wondering now if a thicker softer gasket is better. The gasket would be compressed by the retaining ring. If the acrylic does compress, the gasket can expand to maintain the seal in the event that the sub reaches the surface before the acrylic has expanded.</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469653299816_2651" dir="ltr">Do you have a recommendation.</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469653299816_2651" dir="ltr">Thank you</div><div id="yiv6393352339yui_3_16_0_ym19_1_1469653299816_2651" dir="ltr">Hank</div></div></div><div style="margin-top: 2.5em; margin-bottom: 1em; border-bottom-color: rgb(0, 0, 0); border-bottom-width: 1px; border-bottom-style: solid;"></div><pre class="yiv6393352339k9mail"></pre><hr><br clear="none">Personal_Submersibles mailing list<br clear="none">Personal_Submersibles@psubs.org<br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></blockquote></div></div></div><br clear="none"><div class="yiv6393352339yqt8007477266" id="yiv6393352339yqt59382">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div> </div> </div> </div></div></div><div style="margin-top: 2.5em; margin-bottom: 1em; border-bottom-color: rgb(0, 0, 0); border-bottom-width: 1px; border-bottom-style: solid;"></div><pre class="yiv6393352339k9mail"></pre><hr><br clear="none">Personal_Submersibles mailing list<br clear="none">Personal_Submersibles@psubs.org<br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></blockquote></div></div></div><br clear="none"><div class="yiv6393352339yqt6475544162" id="yiv6393352339yqt52576">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div></div> </div> </div> </div></div></div></div><br><div class="yqt1869742408" id="yqt68035">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>