<div dir="ltr"><div>Hi Hank.</div><div> </div><div>I remember going over this when I did my hatch port. Similar although not to the same spec as yours. The viewport was made by Stanley Plastics and there was a very small "flat" on the high pressure edge. Not a chamfer as such, just a flat bit. So I used this small gap to put an O ring in and then put an epdm gasket between the steel retaining ring and port. Took up the space on the seat side with a cork gasket. It seems to work ok although I haven't tested it to any great pressure. Hope pic makes it through.</div><div> </div><div><img style="margin-right: 0px;" src="cid:ii_ir6498670_15630d41ee146198"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 28 July 2016 at 04:14, hank pronk via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><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><span>Okay, I will not machine a groove in the face, it does seem bad. I am in Canada, so ice is a reality also. I think I will keep it simple and stick with the gasket--that is acceptable and common. I will try to resend the picture and you guys can see what I am talking about.</span></div><div><span>Brian, I think I read that it is bad to put a groove in the seat, also it would be pretty tricky at this point. I finally have a real nice seat that I am totally happy with. I got some pointers from karl Stanley that have worked well. I was over thinking it as usual. lol</span></div><span class="HOEnZb"><font color="#888888"><div><span>Hank</span></div></font></span><div><div class="h5"> <div><br><br></div><div 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 8:38 PM, Sean T. Stevenson via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></font></div> <br><br> <div><div><div><div dir="ltr">I would not machine a groove in the conical face of the port. Instead, use the chamfer on the outer face, and squeeze a ring between that, the seat, and the retaining ring.</div>
<div dir="ltr">Sean<br clear="none">
</div>
<br clear="none"><br clear="none"><div><div>On July 27, 2016 7:24:18 PM MDT, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<blockquote 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 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><span>Hi Sean,</span></div><div><span>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>Hank</div><div><br clear="none"></div> <div><br clear="none"><br clear="none"></div><div 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 7:07 PM, Sean T. Stevenson via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div><div><div><div dir="ltr">Did you email it? I don't see it.</div>
<div 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>On July 27, 2016 6:27:11 PM MDT, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<blockquote 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><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>Hi Sean,</div><div>Did my picture make it? </div><div>Hank</div> <div><br clear="none"><br clear="none"></div><div 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 <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div><div><div>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>On July 27, 2016 3:10:03 PM MDT, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<blockquote 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><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>Hi Sean,</div><div 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 dir="ltr">Do you have a recommendation.</div><div dir="ltr">Thank you</div><div 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></pre><hr><br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">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"></blockquote></div></div></div><br clear="none"><div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">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></blockquote></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></pre><hr><br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">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></div></div></div></div></div></div></blockquote></div><br clear="none"><div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect">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 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></pre><hr><br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">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></div></div><br><div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" shape="rect">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></div></div></div><br>_______________________________________________<br>
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