[PSUBS-MAILIST] innertube compensator

[hank pronk via Personal_Submersibles]

Alan, 
It is all back together now, but I like your idea.   
Hank-------------------------------------------
On Tue, 1/13/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] innertube compensator
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Tuesday, January 13, 2015, 2:53 PM
 
 Hank,I used the
 inner tube when I was experimenting with
 compensatingabsorbed
 glass mat batteries. I had two plumbing fittings in the top
 of the batterywith the
 section of inner tube with a valve in it clamped between
 them.I had the
 battery & tube full of baby oil (scented mineral oil). I
 then pumped upthe inner
 tube to keep an over pressure in the
 battery.There was
 something, either the chemicals added to the mineral oil ,
 or the mineraloil, or
 battery acid & gasses that might have mixed with the
 mineral oil that caused the inner tube
 to melt in a relatively short time.Another
 messy experiment that didn't work. I suggest soaking a
 section of inner tube in the
 compensating fluid & checking it
 occasionally.Alan
 
     
    From: hank pronk via
 Personal_Submersibles
 <personal_submersibles at psubs.org>
 
 To:
 personal_submersibles at psubs.org 
  Sent: Wednesday,
 January 14, 2015 7:41 AM
  Subject:
 [PSUBS-MAILIST] innertube compensator
 
   
 Alan,
 You mentioned that you
 had trouble with using an inner tube as a pressure
 compensation bladder.   What type of oil were you using. 
 I have had mine installed for a few months now and seems
 fine.  I just overhauled my drive and reinstalled the inner
 tube.  You got me worried  :-)
 Hank
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