<div dir="ltr">Alan, if the interior of the motor is in-compressible (as in liquid filled) there is no pressure differential. It's only the pressure <u>differential</u> that counts. There is no push from either side, and you could go to any pressure you like without the seal lifting.<div><br></div><div>Best,</div><div><br>Alec</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, May 20, 2015 at 5:49 PM, Alan James 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:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div><span>While on the motor subject; a simple low pressure lip seal as below (substitute air side with water side)</span></div><div><span>will be pressure compensated in a compensated motor! Is this correct?</span></div><div><span>In oil compensation there will be oil pushing on the wedged shape of the</span></div><div dir="ltr"><span>lips mating surface, from one direction & water from the other. Eventually</span></div><div dir="ltr"><span>the pressure from both sides would lift the seal against it's spring pressure,</span></div><div dir="ltr"><span>but because of the recess above the spring that the oil gets in to, it  will</span></div><div dir="ltr"><span>maintain the same pressure above ambient on the shaft throughout the depth changes.</span></div><div dir="ltr"><span>Alan</span></div><div dir="ltr"><img src="http://tribology.asmedigitalcollection.asme.org/data/Journals/JOTRE9/930241/trib_136_04_041703_f001.png"><span><br></span></div><br>  <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div dir="ltr"> <hr size="1">  <font size="2" face="Arial"> <b><span style="font-weight:bold">From:</span></b> Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br> <b><span style="font-weight:bold">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br> <b><span style="font-weight:bold">Sent:</span></b> Thursday, May 21, 2015 9:17 AM<br> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] MK101 oil compensation tap<br> </font> </div> <div><br><div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div><span>Cliff,</span></div><div dir="ltr"><span>how are you compensating for oil expansion due to heat with the KISS method.</span></div><div dir="ltr"><span>Are you just drilling holes in the housing & using tube?</span></div><div dir="ltr"><span>Alan</span></div><br clear="none">  <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div><br><br></div><div><div dir="ltr"> <hr size="1">  <font size="2" face="Arial"> <b><span style="font-weight:bold">From:</span></b> Clifford Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight:bold">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br clear="none"> <b><span style="font-weight:bold">Sent:</span></b> Thursday, May 21, 2015 8:43 AM<br clear="none"> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] MK101 oil compensation tap<br clear="none"> </font> </div> <div><br clear="none"><div><div><div>Actually in the spirit of KISS, I am going to start out using oil pressure compensation.  If I run into any issues, I will look at using the air or this hybrid of oil and air with a regulator.  <br clear="none"><br clear="none"><br clear="none"><div>Cliff Redus</div></div><div><br clear="none"><br clear="none"></div><div><div><br clear="none">On May 20, 2015, at 2:30 PM, Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div><span>Jon,</span></div><div dir="ltr"><span>the alternative is to follow Hugh's idea that Cliff is using & I am going to test out,</span></div><div dir="ltr"><span>& put a regulator in the system </span>that is set it to around 4psi internal overpressure. </div><div dir="ltr">This means you can fill with oil & not worry about getting every</div><div dir="ltr">last drop going in, or drilling the housing. You will also be able to run it air compensated. </div><div dir="ltr">There is the safety feature that if you leak oil there is plenty of air to replace it.</div><div dir="ltr">Cliff already has the parts sorted, just put your order in:)</div><div dir="ltr">Alan</div><br clear="none">  <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div dir="ltr"> <hr size="1">  <font size="2" face="Arial"> <b><span style="font-weight:bold">From:</span></b> Jon Wallace via Personal_Submersibles <<a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight:bold">To:</span></b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br clear="none"> <b><span style="font-weight:bold">Sent:</span></b> Thursday, May 21, 2015 5:47 AM<br clear="none"> <b><span style="font-weight:bold">Subject:</span></b> Re: [PSUBS-MAILIST] MK101 oil compensation tap<br clear="none"> </font> </div> <div><br clear="none"><br clear="none">How important is it to get every last air bubble out?  Surely a fraction <br clear="none">of the total volume is not going to result in catastrophic failure of <br clear="none">the motor housing, is it?<div><br clear="none"><br clear="none"></div><div><br clear="none"><br clear="none">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">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><blockquote type="cite"><div><span>_______________________________________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><a rel="nofollow" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a></span><br clear="none"><span><a rel="nofollow" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br clear="none"></div></blockquote></div></div><br clear="none"><div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">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><br><div>_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div><br><br></div> </div> </div>  </div></div><br>_______________________________________________<br>
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