RE: [PSUBS-MAILIST] psub convention in Raystown

["Smyth, Alec" <Alec.Smyth@compuware.com>]

The attributes of SCUBA tanks air are basically...

- Free of oil (because it would normally be breathed). Of course the
ballast tanks wouldn't mind, but it would be a pity to contaminate tanks
with oil because they cannot then be used for breathing if you wanted to
do so.
- Free of humidity; the problem here is simply that condensation in the
tanks takes away from the tank volume.
- Pressure, depending on the tank, is anywhere from about 2,200 psi to
something like 4,000 psi. 

The ballast tanks don't care what you put into them. Diesel electrics
can blow ballast with the exhaust gases if on the surface. It's just
that when the container for your air is SCUBA tanks, then they have to
be treated as such, which is pretty standardized. If a SCUBA tank blows,
it's pretty much like a bomb going off, so the folks who refill are
pretty anal about tank inspections and such. The good news is the
inspections are relatively inexpensive, and the same SCUBA shop that
would fill your tanks will probably do them.


Cheers,

Alec

-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Rob And
Kathy
Sent: Friday, June 30, 2006 8:00 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] psub convention in Raystown


Hi Alec, thank you for writing me.
   You are right on all accounts I am not a diver but I need to ask this

question; why scuba air for the  ballast tanks? The power plant I work
at 
has air dryers and ultra fine filters for equipment and we also use a 
special filter/dryer set up for hazmat repair and rescue. I will ask the

safety guy who and where he fills the scba suit that I wear for
emergency 
shut downs and hazzard releases.
             I live in northern minnesota and there are no submarines
here. 
the original owner(he moved away) said that at the time of registration 
(1983) the DNR said it was the only one registered in the state. But who

knows.
    The O-rings, gaskets, sealtite wiring, etc are going to be replaced 
along with the plumbing , but I have to be honest with you on the view 
ports, there thirteen years old  in beautiful shape (no scratches) and 
havent seen the light of day since 1996. I doubt they will be replaced
this 
year. The one dive I want to make before dog days turns the local lakes 
green is a spot that I am familer with and is 15 feet deep, all sand
with 
little weeds. If I enjoy the experience Ill keep at it, buy new view
ports 
and support equipment,  if I dont,  its going on ebay.

-----  





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