<html><head></head><body><div class="ydpe28062b5yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div></div>
<div>Emile, </div><div>I had suggested to Hank to use an octopus 2nd stage regulator, as they are not as sensitive & less prone to free flowing than normal 2nd stage regulators. </div><div>On my ambient I had an extention to the exhaust ports to also help prevent free flow & to stop water getting in through the valve. </div><div>As you say, keeping the regulator low in the system will help prevent water getting in. </div><div>Any further thoughts on this anyone? </div><div>Alan</div><div><br></div><div><br></div>
<div id="ydpe28062b5yahoo_quoted_1193696540" class="ydpe28062b5yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
On Friday, January 15, 2021, 07:23:28 PM GMT+13, via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id="ydpe28062b5yiv2849226520"><div><div class="ydpe28062b5yiv2849226520WordSection1"><p class="ydpe28062b5yiv2849226520MsoNormal"><span>Hank,</span></p><p class="ydpe28062b5yiv2849226520MsoNormal"><span> </span></p><p class="ydpe28062b5yiv2849226520MsoNormal"><span lang="EN-GB">The lenght should be not a problem.You can create a small overpressure by placing the second stage as low as possible. Any water or condensation will be expelled during ascending as another advantage. Flow restriction sounds ok. </span></p><p class="ydpe28062b5yiv2849226520MsoNormal"><span lang="EN-GB"> </span></p><p class="ydpe28062b5yiv2849226520MsoNormal"><span lang="EN-GB">Br,Emile</span></p><p class="ydpe28062b5yiv2849226520MsoNormal"><span lang="EN-GB"> </span></p><div class="ydpe28062b5yiv2849226520yqt2158324939" id="ydpe28062b5yiv2849226520yqt66021"><div><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm;"><p class="ydpe28062b5yiv2849226520MsoNormal"><b>Van:</b> Personal_Submersibles <personal_submersibles-bounces@psubs.org> <b>Namens </b>hank pronk via Personal_Submersibles<br clear="none"><b>Verzonden:</b> donderdag 14 januari 2021 21:16<br clear="none"><b>Aan:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br clear="none"><b>Onderwerp:</b> [PSUBS-MAILIST] regulator for compensating</p></div></div><p class="ydpe28062b5yiv2849226520MsoNormal"> </p><div><div><p class="ydpe28062b5yiv2849226520MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">HI All, I have been playing around with and installing a first and second stage regulator on my ROV to compensate the arm etc. Alan has raised a very valid concern. The pressure differential between intake and exhaust is very slight and make me think the air may not make it to the arm motors. Alan has suggested extending the exhaust ports to create more back pressure. I was also thinking about restricting the volume allowed to exhaust, so if it free flows the restriction will help close the exhaust valve. </span></p></div><div><p class="ydpe28062b5yiv2849226520MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Any thoughts on the matter?</span></p></div><div><p class="ydpe28062b5yiv2849226520MsoNormal"><span style="font-size:10.0pt;font-family:sans-serif;">Hank</span></p></div></div></div></div></div></div><div class="ydpe28062b5yqt2158324939" id="ydpe28062b5yqt89038">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a shape="rect" href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank">Personal_Submersibles@psubs.org</a><br clear="none"><a shape="rect" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"></div></div>
</div>
</div></div></body></html>