Re: [PSUBS-MAILIST] Regulating Pressure in 1 ATM Sub

[robertbatta@comcast.net]

Thank you all for your replies.  You've answered my question. 

Many Thanks,

Rob
> Welcome Rob,
> 
> When you breath you use O2 and you exhale CO2. The CO2 is absorbed and the
> pressure drops. Metal bellows are expanded and they open a valve that admits
> O2 to enter the sub until the original pressure is reached. (The bellows are
> compressed and the valve is closed). There was a discussion on the subject
> in june 2002. Look in the archive for the subject "source for a demand
> regulator". Phil Nuytten has written an interresting artikel on the subject.
> I printed it but i do not know where i got it from. I cannot help you on the
> "purge compressor", i do not know what it is.
> 
> Good luck
> Thijs Struijs
> The Netherlands
> 
> ----- Original Message -----
> From: <robertbatta@comcast.net>
> To: <Personal_Submersibles@psubs.org>
> Sent: Thursday, November 06, 2003 8:54 PM
> Subject: [PSUBS-MAILIST] Regulating Pressure in 1 ATM Sub
> 
> 
> > Hello,
> >
> > I am new to the group and plan on building a 2 man dry 1 atm sub.  I plan
> on using a CO2 Scrubber and O2 replenishment.  With the O2 bleeding in, how
> to I ensure the sub stay at a nominal 1 ATM pressure ?
> >
> > I've read that the "Luxury" sub's use a "purge compressor" to achieve
> this, however, I can find little to no information on this type of
> compressor.
> >
> > I read some of the archive posts, someone has asked the question before -
> I apologize for repeating it, but I did not see a clear answer.
> >
> > Thanks in advance.
> >
> > Rob Batta
> >
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