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Mistral DH Reg (~1959) and modern tanks

Discussion in 'Vintage Equipment Diving' started by CT-Rich, Apr 21, 2020.

  1. Scuba Lawyer

    Scuba Lawyer Manta Ray

    # of Dives: 5,000 - ∞
    Location: Laguna Beach, California
    602
    1,601
    93
    Great!

    As for the IP gauge leaking, yeah, you need to fix that.

    What is leaking if you turn nut past 80psi? The IP gauge connection, or the 1st stage? If its just the IP gauge, the volcano orifice is not involved. If its the 1st stage that is leaking it could be a number of things. Fix your IP gauge connection first then see what happens when you raise IP to 135 or so.


    If its the 2nd stage that is leaking when you raise the IP, loosen the retaining nut on the 2nd stage so the spring pushes the 2nd stage seat against the 2nd stage volcano orifice with full force. Once you get your IP adjusted to where you want it, slowly screw in the 2nd stage retaining nut until air escapes, then loosen it a 1/2 turn or so.

    M


     
    Sam Miller III likes this.
  2. JamesBon92007

    JamesBon92007 Great White

    # of Dives: 2,500 - 4,999
    Location: Southern California...too far from the ocean
    3,138
    1,246
    113
    Unfortunately it's not only the gauge that's leaking. I adjusted it according to the instructions by turning it until it leaked and then backing it off until it no longer leaked and it breathes hard and the IP is only about 80 psi. I will try to follow your instructions and see how that goes. You are talking about the nut that surrounds the hex screw that adjusts the IP?
     
  3. Scuba Lawyer

    Scuba Lawyer Manta Ray

    # of Dives: 5,000 - ∞
    Location: Laguna Beach, California
    602
    1,601
    93
    NO, definitely not. I'm talking about the nut on the second stage that holds in and adjusts the poppet stem that holds the LP seat. If you want to talk about it PM me your phone number and I'll be happy to walk you through it. Mark
     
    Sam Miller III and captain like this.
  4. JamesBon92007

    JamesBon92007 Great White

    # of Dives: 2,500 - 4,999
    Location: Southern California...too far from the ocean
    3,138
    1,246
    113
    I've been incredibly busy and finally got back to the DAAM regulator. :) OK, I get it now. It's a lot like adjusting the second stage on an old Calypso. I didn't get the IP gauge on there yet so I may have to order the adaptor that was mentioned.
     
    Scuba Lawyer likes this.

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