<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head><body><div>Brian,</div><div><br></div><div>From my experience those shaft seals can't handle any real pressure and wouldn't work for submarine service, unless you wanted to test your escape system.</div><div><br></div><div>Keith </div><div><br></div><div><br></div><div><br></div><div id="composer_signature"><div style="font-size:85%;color:#575757" dir="auto">Sent from my Verizon, Samsung Galaxy smartphone</div></div><div><br></div><div style="font-size:100%;color:#000000"><!-- originalMessage --><div>-------- Original message --------</div><div>From: Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> </div><div>Date: 6/24/16 9:29 PM (GMT-08:00) </div><div>To: PSubs <personal_submersibles@psubs.org> </div><div>Subject: [PSUBS-MAILIST] Shaft seals </div><div><br></div></div><div style="font-family:Arial, sans-serif; font-size:10pt;"><div>Hi All,</div><div> I was wondering if anyone is familiar with the PSS shaft seal system. I've been working on my support boat ( 30' Islander sailboat) , I'm about ready to haul it out for a bottom painting job and I'm planning on replacing the shaft seal at the same time with the PSS shaft seal. I think it might have some application to a sub motor shaft seal except it would have to be modified. The seal occurs between a flat carbon piece and a flat stainless piece. On a sailboat of course there is hardly any pressure so it a different situation. But the part that intrigues me is the stainless riding on the carbon as the point of friction for the turning shaft. This would eliminate using O rings to make the seal , where the o rings could fail. There would need to be a certain amount of pressure applied to the carbon and stainless pieced but assuming the motors are pressure compensated or oil filled I don't think that would be an issue. As I haven't entered the "motor phase " of my sub I haven't followed the seal discussions too intently so I may be all wet about this ( can only do one thing at a time!) </div><div> </div><div>Anyway , check out these units, I'd be curious if anyone thinks they may have an application.</div><div> </div><div> <a href="http://www.shaftseal.com/en/about/installation_videos">http://www.shaftseal.com/en/about/installation_videos</a></div><div> </div><div> </div><div>Brian</div></div></body></html>