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Aqualung Supreme "specially adjusted"

Discussion in 'Regulators' started by jd950, Jan 13, 2012.

  1. jd950

    jd950 Solo Diver

    # of Dives: 200 - 499
    Location:
    1,112
    125
    63
    According to Aqualung, their Supreme regs are "Specially adjusted to resist freezing." I have found some reference to this being a change in the MP adjustment, but I do not understand how this impacts freezing or "performance" of the regulator. Also, could one not simply make this adjustment on a non-supreme reg and accomplish the same thing? I gather there is some reason one would not want a regulator adjusted this way if not diving in cold water.

    Any help?
     
  2. Fishpie

    Fishpie Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Fort Lauderdale
    1,657
    226
    63
    I sure there will be better and more detailed explanations to follow but in a nutshell if the Intermediate Pressure is reduced cooling and possible ice formation is also reduced. The downside is that gas flow is also diminished a bit, theoretically reducing performance.
     
  3. Six2Life

    Six2Life Solo Diver

    205
    39
    28
    I asked basically the same question here. What I gathered from that thread is that the Supreme is somewhat detuned to help reduce the chances of freezing, along with the secondary seal. Detuning an unsealed conshelf (XIV, XXI, XXII, etc) should improve it's cold water performance, as detuning any reg would.
     
  4. j2s

    j2s Loggerhead Turtle

    # of Dives:
    Location: florida
    1,311
    221
    0
    So if I hook my IP gauge up and adjust the MP pressure on the 1st stage to the lower end of specs [factory/manual recommends btx 9-10] this will lessen possibility of icing ???.....
     
  5. EODiver

    EODiver Solo Diver

    # of Dives: I just don't log dives
    Location: Always on the move...
    50
    2
    8
    Basically, yes. Air flow is decreased, and doesn't get as cold. I don't have my manuals in front of me, they are in the dive locker at work, but I believe a Conshelf is set about 10-15 psi (1 bar) higher than a Conshelf Supreme. Then you have the enviro seal that keeps everything away from the internals, except for your liquid buffer.
     
  6. jd950

    jd950 Solo Diver

    # of Dives: 200 - 499
    Location:
    1,112
    125
    63
    I should have searched, I see this has been answered before, at least in part. At least on the "older" legend regs the specs called for an MP setting of 137±7 psi (standard) and 123±7 psi (supreme).

    So a standard can simply be adjusted down to match the supreme.

    That leads me to wonder if this difference in IP would be be noticeable to a diver. If using a Supreme for warm water is it worth adjusting up to 135 or so?
     
  7. EODiver

    EODiver Solo Diver

    # of Dives: I just don't log dives
    Location: Always on the move...
    50
    2
    8
    Yes, you can adjust it to a lower IP, but you don't have the additional enviro seal. I can't tell any difference between my Conshelfs and my Conshelf Supreme, but I like my Supreme better. Most of my diving is 35' or less and visibility measured in inches not feet. So I feel like it's giving me some additional protection for the internals.
     
  8. EODiver

    EODiver Solo Diver

    # of Dives: I just don't log dives
    Location: Always on the move...
    50
    2
    8
    I reread your post and realized what you were asking... Yes, you can tune it to the higher IP, you can't tell the difference.
     

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