[PSUBS-MAILIST] Rotary Seal

[hank pronk via Personal_Submersibles]

Alan,
That is an interesting idea, to reverse them.  What happens when there is no internal pressure, maybe nothing.  You would have to look at them closely to decide.  It has been so long since I saw one, but I think it is a simple wiper seal.  I have one apart, I can check it out.  I think that high rpm is going to haunt you.  I thought low rpm and big prop was the most efficient.  
Hank
--------------------------------------------
On Mon, 12/1/14, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Rotary Seal
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Monday, December 1, 2014, 9:32 PM
 
 Hank,what seals
 do trolling motors use?Would I be
 better to mount them the other way round, as I have a 4psi
 internal overpressure?Alan
 
   
 
   
    From: hank pronk via
 Personal_Submersibles
 <personal_submersibles at psubs.org>
 
 To: Personal
 Submersibles General Discussion
 <personal_submersibles at psubs.org> 
 
 Sent: Tuesday,
 December 2, 2014 2:54 PM
  Subject: Re:
 [PSUBS-MAILIST] Rotary Seal
   
 
 Alan,
 It seems that trolling
 motor seals work pretty good, what about them.  Are you
 planning a high rpm?  
 Hank
 --------------------------------------------
 On Mon, 12/1/14, Alan James via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 
 
  Subject:
 [PSUBS-MAILIST] Rotary Seal
  To:
 "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Monday, December 1, 2014, 8:44 PM
  
  Has anybody got any
 recomendations on a rotary
  seal type for
 my thruster propeller shaft. Looked at the Parker
  seal pdf & there seems a lot of options.I
 am wanting to oil compensate using the 3 cst
  silicone oil that Carsten recomended,&
 intend to have about 4 psi internal pressure
  above ambient.ThanksAlan
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