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SPG needle dip while purging xStream 2nd stage

Discussion in 'Poseidon' started by Corey Zhao, Mar 4, 2017.

  1. Corey Zhao

    Corey Zhao Garibaldi

    # of Dives: 100 - 199
    Location: China
    3
    0
    1
    Hello everyone,
    I would like to ask if it is normal: My SPG needle dip significantly while I purge my xStream 2nd stage. I use a 11L AL tank, DIN connector, 150 Bar air left, purge on land, needle dip from 150 to 50 but back to 150 quickly. I know Poseidon Reg has very strong purge, but is my regulator works normally?
    Sorry I am not a native English speaker :)
     
  2. RainPilot

    RainPilot CCR Instructor Staff Member

    # of Dives: I just don't log dives
    Location: UAE
    4,007
    3,555
    113
    Not sure but that doesn't sound right. @tbone1004 dives xstream so maybe he can give some input.

    Sounds like a valve isn't all the way open, does this happen on all tanks?
     
  3. Alastor

    Alastor Liveaboard

    # of Dives: 200 - 499
    Location: Italy
    323
    81
    28
    Possibly check the filter at the inlet of the first stage - is it a DIN or INT ?
     
  4. dumpsterDiver

    dumpsterDiver Banned

    # of Dives: 2,500 - 4,999
    Location:
    9,003
    4,666
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    I would plug a LP gauge into the inflator and see how that responds. If the reg seems OK, there may be a tiny bit of corrosion somewhere between the regulator and the pressure guage, there are some very small orifices that could be partially blocked.
     
  5. redacted

    redacted Guest

    If the filter is OK, I would be suspicious of abnormally large HP orifices in the 1st stage and HP hose.
     
  6. Corey Zhao

    Corey Zhao Garibaldi

    # of Dives: 100 - 199
    Location: China
    3
    0
    1
    Hi Alastor, there are DIN tank and DIN 1st stage
     
  7. Corey Zhao

    Corey Zhao Garibaldi

    # of Dives: 100 - 199
    Location: China
    3
    0
    1
    OK problem solved! The tank was not fully opened...
    Thank you all~!
     
  8. RainPilot

    RainPilot CCR Instructor Staff Member

    # of Dives: I just don't log dives
    Location: UAE
    4,007
    3,555
    113
    Good stuff. Thats why its advised to watch the SPG when breathing regs before diving, to avoid exactly this issue. Enjoy the regs!
     
  9. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,723
    7,063
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    @RainPilot sorry for delay, I do not dive xStreams, but the first suggestion was to make sure the valve was all the way open because that is not normal behavior for any regulator
     
  10. RainPilot

    RainPilot CCR Instructor Staff Member

    # of Dives: I just don't log dives
    Location: UAE
    4,007
    3,555
    113
    Aha. I know you dive Poseidon I must have just assumed xstream. You dive Jetstream?
     

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