----- Original Message -----
Sent: Thursday, August 20, 2009 5:07
PM
Subject: Re: [PSUBS-MAILIST] Clogged O2
orifices
Hi, Alan:
We use a light coating of 'Joy' household
detergent soap - put on with a dampened pad of Kleenex - it acts as a wetting
agent and the moisture lays as an even, clear sheet that is virtually
invisible ojn the acrylic- since the soap breaks the surface tension that
causes the minute 'droplets' to act as a 'fog'.
For you diving-helmet wearers, it's also one of
the few surfactants that I know, that prevents fogging on polycarbonates
(Lexan, etc.)
It's a bit of a knack to get just the right
amount on - but it works like a champ!
Phil
P,S. consider using an in-line scintered filter
before your steady-flo orifice
----- Original Message -----
Sent: Wednesday, August 19, 2009 9:38
PM
Subject: [PSUBS-MAILIST] Clogged O2
orifices
Hi Jay,
In your coments on the "nitrox ambient" you
mentioned the following.
If you use a constant
flow of oxygen, optimally this should be equivalent to your rate of
consumption of O2 and is usually accomplished with an
orifice. The problem is that the size of the orifice is very small and
can be clogged easily. Rebreathers that in the past have used this
method have been plagued with clogged orifices and the Navy had numerous
warnings concerning this issue in their course ?Principles of Navy
Diving?.
Does this apply to the medical O2 regulators used in Psubs, they
regulate a constant pressure through a small orifice.
Also Phil if you're out there- Do you use an anti
fogging product on the acrylic of your newt suit. If so what is
it & is it removed regularly & with what.
I don't want to put any product on thats going to affect the
acrylic.
Thanks Alan