Re: [PSUBS-MAILIST]

["Land N Sea" <landnsea1@hawaiiantel.net>]

Thanks Dan,

 

guess that explains why Kittredge used the Phos. Bronze. I would love to keep all HP gases from entering the sub but that would necessitate an 02 reg exposed to salt water? any ideas about that? I am also not familiar with Phil's tilt/demand system, do you and the data on that?

 

Rick P.

From: Daniel D. Lance

Sent: Thursday, June 30, 2011 2:22 PM

To: personal_submersibles@psubs.org

Subject: Re: [PSUBS-MAILIST]

Rick,
I built my K-350 according to the plans and made the Phos. bronze fittings. If I had it to do over again I would skip that part and bring the O2 into the cabin at low pressure instead of high. Stainless steel is not favored for HP oxygen service. Phil Nuytten has the best system going with the tilt  / demand valve.
Dan Lance

On 6/29/2011 10:49 PM, Land N Sea wrote:

I am building a K-350 and am trying to get as many thru hull fittings welded in as I can before welding the end caps on. For anyone who has the plans for a K-350, did you actually follow drawing 041-2? it is the Phos. bronze removable piece for the 02 to pass threw and looks quite expensive to machine if not doing it yourself.

I would like to hear from anyone regardless of boat type that uses an 02 life support system what they welded in for a threw hull fitting. I can't see why I just can't weld in a schedule 80 ss 316-L pipe coupling then screw into that a HP valve then HP to LP 02 regulator then a proper flow meter for 02?? I would 02 clean the nipples and coupler of course. Also any feed back for the ID of pipe I should use would be appreciated.

 

Rick P.