[PSUBS-MAILIST] Shaft seals

[k6fee via Personal_Submersibles]

Brian,
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.
Keith 


Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> Date: 6/24/16  9:29 PM  (GMT-08:00) To: PSubs <personal_submersibles at psubs.org> Subject: [PSUBS-MAILIST] Shaft seals 
Hi All,                 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!)   Anyway , check out these units, I'd be curious if anyone thinks they may have an application.  http://www.shaftseal.com/en/about/installation_videos  Brian
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