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Other Dive Equipment: Discuss Semi permeable membrane compressors in the Dive Kit and Equipment forums: Just looking for a bit of info on the above. It's a compressor that takes nitrogen out of the ...

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Old 01-02-03, 05:50 PM
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Just looking for a bit of info on the above. It's a compressor that takes nitrogen out of the air and makes Nitrox mixes up to 40%(I believe)without external o2. Does anyone have a clue how much these things cost to buy and run? The club is making noises about getting a compressor and dough-boy said he'd look into it.

Peter(dough-boy)k
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Old 01-02-03, 06:19 PM
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I think I heard once that they can be something like 40 grand and up.... maybe just outside club funds.. ;)
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Old 01-02-03, 06:56 PM
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Yes, I heard they cost an arm and a leg. The cheapest way is Partial Pressure blending. I think that the official name for what your talking about is a "Pressure swing absorbtion" or something like that.
If you want any more info then let me know and I will dig the blender manual out.
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Old 01-02-03, 09:58 PM
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Yeah, 40k is just a bit out of the clubs cash flow, we'd struggle 40 quid. Ah well, a bog standard compressor it'll be then I think. Thanks anyway guys.

Peter
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Old 02-02-03, 04:59 PM
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I saw an advert for one of these that stated 12K, still pretty steep though
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Old 02-02-03, 05:27 PM
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Peter

I believe that the compressor you may be thinking of is built by Coltri Sub.  Like Steve W, I believe that they start at around £12K.
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Old 02-02-03, 07:20 PM
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i met the guy that designed this system when i was in florida, he is some kid, 70 years old or so diving since water was invented, teaches hyperbaric medicine now
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Old 02-02-03, 07:47 PM
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Where does he live? Does he have one in his garage? When does he go on holiday? It's about the only way our club would aquire one, even at 12k

Peter
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Old 02-02-03, 10:51 PM
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Just to make you realy sad have a look at this.

http://www.coltrisub.it/catalogo/index.htm

Regards
Michael
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