<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>My thrusters are air compensated with the compensation pressure being adjustable and the system monitored via a differential pressure gauge in the sub. I could easily crank up the compensation pressure to test if air escapes a single unreversed seal (although I agree it makes sense to reverse it). But I don't have an easy way to test external pressure if that's what you meant.</div><div><br></div><div>Thanks,</div><div><br></div><div>Alec</div><div><br>On Apr 11, 2017, at 8:12 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1491912016045_3208"><span>Jon,</span></div><div id="yui_3_16_0_ym19_1_1491912016045_3206"><span>Alec's drill solution will work for sure, but the seals still have to come out to reverse the inner seal. I am still </span>convinced it needs to be reversed.</div><div id="yui_3_16_0_ym19_1_1491912016045_3206" dir="ltr">In my case the inner seal would be ruined and the outer seal can be saved, that outer seal can then become the inner seal. If there is concern about the seal leaking overnight weather air or oil compensated, it won't leak. The proof is in the fact that the inner seal in original orientation is holding air at 4 psi and water at 15 psi. Surely if the seal can hold air backwards then it will hold oil or water in or out. </div><div id="yui_3_16_0_ym19_1_1491912016045_3206" dir="ltr">I do have a chamber big enough for the testing but I do not have the same motors, mine are 3.25 dia and my 50lb verticals are different than your 101's</div><div id="yui_3_16_0_ym19_1_1491912016045_3206" dir="ltr">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Tuesday, April 11, 2017 5:42 AM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv9871970969"><div><div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:16px;"><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550">Alec's idea of simply drilling a small hole through the outer seal effectively eliminates it, if I understand the concept correctly. It also eliminates the need to take the motor apart to remove and replace the seals/bearing.</div><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550"><br clear="none"></div><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550">Folks, do we have a resource that could pressure test a one seal solution as installed from the factory?</div><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550"><br clear="none"></div><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550">Jon</div><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11550"><br clear="none"></div> <div class="yiv9871970969qtdSeparateBR" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11549"><br clear="none"><br clear="none"></div><div class="yiv9871970969yahoo_quoted" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11531" style="display:block;"> <div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11530" style="font-family:times new roman, new york, times, serif;font-size:16px;"> <div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11529" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div class="yiv9871970969yqt3896794937" id="yiv9871970969yqtfd07393"><div dir="ltr" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11548"><font id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11547" size="2" face="Arial"> On Monday, April 10, 2017 11:18 PM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv9871970969y_msg_container" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11528"><div id="yiv9871970969"><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11527"><div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11526" style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"><div id="yiv9871970969yui_3_16_0_ym19_1_1491880139364_2920"><span>I am not sure why there is an </span>interest in keeping both seals, to my mind the outer seal is dead weight. Unless you do as Sean says, to compensate the space between seals, the outer seal is useless. Having two opposite seals is guaranteeing to trap water without Sean's solution. The proof is in the submersible pumps that operate deeper than our subs. Just my two cents ;-)</div><div id="yiv9871970969yui_3_16_0_ym19_1_1491880139364_2920">Hank</div> <div class="yiv9871970969qtdSeparateBR" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11525"><br clear="none"><br clear="none"></div><div class="yiv9871970969yqt7074206383" id="yiv9871970969yqt44165"><div class="yiv9871970969yahoo_quoted" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11535" style="display:block;"> <div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11534" style="font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;"> <div id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11533" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr" id="yiv9871970969yui_3_16_0_ym19_1_1491910052486_11532"><br clear="none"></div></div></div></div></div></div></div></div></div> </div></div><div class="yiv9871970969yqt3896794937" id="yiv9871970969yqtfd05061"> </div></div><div class="yiv9871970969yqt3896794937" id="yiv9871970969yqtfd85240"> </div></div></div></div></div><div class="yqt3896794937" id="yqtfd26268">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">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></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>