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  • Problem With A Regulator

    I have a Smith regulator that came with my Miller 252. When the gas is turned on the tank the low pressure gauge slowly keeps rising. If the mig gun is triggered the pressure falls and I hear gas coming out of the gun. When the trigger is let off the low pressure gage continues to rise irrespective to the adjustment on the screw. When the gas is fully bled off the gage stays at 10 and will not return to zero. what is wrong with the gage?
    Thanks,
    Nick

  • #2
    Sounds like a leaky diaphragm. As for the gauge staying at 10 it could be a bent needle, dropped gauge, out of calibration.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

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    • #3
      As MMw says, it could certainly be a bad diaphragm.

      If you decide to replace the regulator, I suggest a flow meter such as a Smith or a Victor. I like the visual aspect of the floating ball. The regulator types are more difficult to read, at least in my opinion.

      I have a Victor flow meter on my Millermatic 252 and a Smith on the Syncrowave 200. Both of them were bought about 20 years ago and are still going strong.
      Last edited by Synchroman; 07-15-2013, 07:48 AM.
      Miller Syncrowave 200
      Milermatic 252
      Lincoln AC/DC "Tombstone"

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      • #4
        Keep a Spare on Hand..

        Good illustration for why you should have a spare regulator on hand...
        even one of the $25 import ones with the ball flowmeter...

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        Just put on the spare and send the defective one out for repair and recertification...
        .

        *******************************************
        The more you know, The better you know, How little you know

        “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

        Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

        My Blue Stuff:
        Dynasty 350DX Tigrunner
        Dynasty 200DX
        Millermatic 350P w/25ft Alumapro & 30A
        Millermatic 200

        TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

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        • #5
          Pressure creeping up is usually debris in the orifice. You might try connecting the reg without the outlet hooked up and burping it a time or two. Otherwise go to the link I sent you on the SFT board.

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          • #6
            Thanks for the advice. I really appreciate it. I have a ball style regulator as an extra. I will either get it fixed or attempt to do it myself.
            Thanks again,
            Nick

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