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Post by scubadiverbob on Mar 25, 2015 13:34:55 GMT -8
So, Is the exhaust hose inside the intake hose? DRAGER-Delphin-II-regulator-vintage-scuba-diving www.ebay.com/itm/like/301569528131?rmvSB=trueJust curious ... If the intake and exhaust use the same hose, what would prevent carbon dioxide build up? Would it breath very easy? |
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Post by nikeajax on Mar 25, 2015 14:20:46 GMT -8
Robert, I'll bet it's like the Demone, in that it has a smaller hose inside to deliver the air to the diver: perhaps without the big hose your exhaust would come out like a SH... This is just my hypothesis  Jaybird |
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Post by nikeajax on Mar 26, 2015 9:11:06 GMT -8
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Post by SeaRat on Mar 27, 2015 9:07:02 GMT -8
Jaybird, no it's not like the Demone; the Demone regulator is basically a single hose regulator with an outside hose to carry exhausted air away from the diver's field of vision after it went through a non-return valve. Here are Several photos from the E-Bay website:  Note that only one hose is used for inhalation and exhalation. Here's the look inside:   Note that the inhalation and exhalation went to the same place. I'm pretty sure I've seen an Experimental Diving Unit evaluation that was sent back to Drager saying they needed a second hose because of CO2 buildup. So this is probably a fairly rare unit. Here are some of the promotional materials from Drager:   John |
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Post by nikeajax on Mar 27, 2015 11:21:50 GMT -8
John, thank you for clearing that up! Concerning the Demone, it looks like they might be a decent reg without the larger hose attached, as it looks like it would probably flood out a lot, no? Jaybird |
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Post by SeaRat on Mar 27, 2015 11:56:37 GMT -8
Nope, I don't think it would flood at all. I'm looking at the parts diagram it Basic Scuba, and it has two exhaust valves, which are circular around the valve mechanism, which would preclude flooding. The Demone Mark I was a single hose regulator with the exhaust hose, but in certain positions it was hard exhaling because the hose was down below the mouthpiece. By making it a double hose (with single hose LP hose inside on both sides), they got rid of this problem. According to Fred Roberts, "The 1962 models of the Demone Mark I and Mark II demand regulators employ a unique tilt valve pilot operator system which is different from the more conventional upstream tilt valve originally employed in earlier models..." So it was a duel pilot valve that probably was a pretty easy-breathing regulator.
John
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Post by nikeajax on Mar 27, 2015 15:45:51 GMT -8
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Post by SeaRat on Mar 28, 2015 11:53:57 GMT -8
Good catch, Jaybird. I had not noticed that before. But without a sintered filter, you get whatever comes out of those rusty ol' steel tanks. I noticed they could be used with either a scuba valve or a fire extinguisher valve. John |
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Post by scubadiverbob on Mar 29, 2015 11:01:49 GMT -8
Wow! a collector must have bought it! It went for $431.55 !!
I usually am curious about something or want to dive something before I buy. With the thought of CO2 build-up I don't think I'd pay that much for it. Being curious and wanting to know how it actually worked; well, I'm not too wealthy ...
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