Re: [PSUBS-MAILIST] DEEP WORKER

[nick <timely@jps.net>]

Phil Nuytten wrote:

> Hi, Pat:
>         We carry 100 cubic feet of O2 ( 2 standard SCUBA '50's) and two Co2
> scrubbers with a rated duration of  36 hours each ( 72 hour total) and an
> actual of about 43-45 hours each ( 86-90 hours total). Deepworker has an
> life support system that is briefly described  in a DW2000 technical paper
> on  Nuytco's website -( www.nuytco.com ) The reason for two O2 tanks and
> two scrubbers is that we also have two bellows-add controllers, two
> continous-flow metered orifices, two sets of analog supply pressure and
> intermediate pressure guages, and two sets of emergency by-pass valves . .
> .in other words, two complete, independant, redundant, life support
> systems.  If the port side fails, we still have 36 hours on the starboard
> side, plus the ability to do a passive breathe (via  oral/nasal mask)
> through the second scrubber to restore full 72 hours - hence the reason for
> the large 02 supply on both sides, going in. You could wipe out one side
> completely and still have one functioning side plus a fully accessible
> second scrubber. At a conservative minimum exertion consumption rate of .25
> to .35 lpm 02, a single 50 of 02 would last around a 100 hours - or  about
> the actual scrubber time.
> Phil Nuytten
>