[PSUBS-MAILIST] gasket test results

[hank pronk via Personal_Submersibles]

No, I bought them for another project that didn't get built.--------------------------------------------
On Wed, 7/8/15, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] gasket test results
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Wednesday, July 8, 2015, 10:26 AM
 
 Do those new ones have the holes in
 them ?   Replacements for the gamma
 viewports?
 
 Brian 
 
 --- personal_submersibles at psubs.org
 wrote:
 
 From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
 Subject: Re: [PSUBS-MAILIST] gasket test results
 Date: Wed, 8 Jul 2015 07:09:40 -0700
 
 Brian,
 No, I have a whole set of brand new ports I am using.
 Hank
 --------------------------------------------
 On Wed, 7/8/15, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
  Subject: Re: [PSUBS-MAILIST] gasket test results
  To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
  Received: Wednesday, July 8, 2015, 9:58 AM
  
  Hank,   Is that one of
  my ports you're using to test ?
  
  Brian
  
  --- personal_submersibles at psubs.org
  wrote:
  
  From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
  To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
  Subject: Re: [PSUBS-MAILIST] gasket test results
  Date: Wed, 8 Jul 2015 05:35:11 -0700
  
  Also, I was able to do a slide test of the port on the
  gasket.  At 500 psi with grease the port slides
  easily.  Without grease, I could not move the
  port.  To move the port I simply shimmed between the
  loosened air fitting and the port.  After pressurising
  the chamber, I simply tightened (threaded in) the air
  fitting and that pushed the port sideways.
  Hank
  -------------------------------------------- 
  On Wed, 7/8/15, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
  wrote:
  
   Subject: [PSUBS-MAILIST] gasket test results
   To: personal_submersibles at psubs.org
   Received: Wednesday, July 8, 2015, 8:15 AM
   
   I did my testing this morning and
   found some scary results.  I bonded EPDM gasket
   material to my port test chamber and tested a port to
 500
   psi.  The gasket extruded about 1/16 of an inch. 
   When I greased the surface of the gasket and
 pressured it
  to
   500 psi, the gasket extruded 1/2 inch.  When the
   pressure is released the gasket returns to its
 original
   position.  
   When the same test is done without bonding, I get the
 same
   result.  
   
   My next test will be with the bearing surface
 machined to
   create tiny ridges for traction.  
   Hank
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