[PSUBS-MAILIST] Seals

[Alan James via Personal_Submersibles]

Answering my own thread here, but the dual spring loaded lip seal only seems to be in the low pressure range. It is 2 seals combined, so there is a gap in between that wouldfill up with sea water from outside & oil from inside in an overpressure situation.A sales rep suggested that for my application with oil compensation, I just go with a low pressure $6- seal.Which begs the question, "why do they bother having a double lipped seal for separatingfluids if a single lipped seal would do"?Alan
      From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, May 14, 2015 7:43 AM
 Subject: [PSUBS-MAILIST] Seals
   
Anyone familiar with the opposed dual spring loaded lip seal for the separation
of two fluids?
http://www.ceetak.com/wp-content/uploads/2011/05/Ceetak-Rotary-Shaft-Seals-Brochure.pdf
It "seems" the ideal seal for an oil compensated thruster, where you are keeping water out & oil in.  Am trying to find the right type of seal to fit on a 10mm propeller shaft that will run at up to 3000 rpm. 250 psi max pressure.
Regards Alan
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