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  1. #1
    Join Date
    Feb 2008
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    9

    Default argon thru co2 regulator

    I know that using straight co2 through an argon regulator is possible (at low flow rates to prevent freezing), but what about the other way around? Can I use argon through a co2 regulator? The flowmeter will be inaccurate (since argon is less dense than co2) but is this the only issue that I will encounter?

  2. #2
    Join Date
    Aug 2007
    Location
    Northern California
    Posts
    184

    Default

    Quote Originally Posted by mk10 View Post
    I know that using straight co2 through an argon regulator is possible (at low flow rates to prevent freezing), but what about the other way around? Can I use argon through a co2 regulator? The flowmeter will be inaccurate (since argon is less dense than co2) but is this the only issue that I will encounter?

    I have two Smiths flowmeters. One is marked for Argon, Helium, C02 and the other is marked Argon, C02. That means that either of them can use either Argon or C02.

    The difference is in the scale markng for each gas and that's only about 1/2" at the top of the tube. My MIG is usd on straight C02 at around 15-20 scfm and has yet to freeze up. At that setting, the scales are almost exactly the same. C02 will, of course, freeze a flowmeter if you use excessive gas flow rates.

    There should be no difference in the structure of the flowmeters since both of the gases are inert. I would say that you will be OK.
    Last edited by Synchroman; 02-15-2008 at 03:49 PM.

  3. #3
    Join Date
    Feb 2008
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    9

    Default

    The regulator that I have is a Victor HRF2380--the HRF2325 is its argon counterpart. The differences between the two seem to be:

    co2
    - preset outlet pressure: 80 psig
    - flowtube scale: 8-28 scfh
    - safety relief valve: 150 psig

    Argon
    - preset outlet pressure: 25 psig
    - flowtube scale: 10-50 scfh
    - safety relief valve: 60 psig

    Do you think I need to adjust the preset pressure screw to compensate for using lower density argon?
    Last edited by mk10; 02-15-2008 at 05:37 PM.

  4. #4
    Join Date
    Aug 2007
    Location
    Northern California
    Posts
    184

    Default

    Quote Originally Posted by mk10 View Post
    The regulator that I have is a Victor HRF2380--the HRF2325 is its argon counterpart. The differences between the two seem to be:

    co2
    - preset outlet pressure: 80 psig
    - flowtube scale: 8-28 scfh
    - safety relief valve: 150 psig

    Argon
    - preset outlet pressure: 25 psig
    - flowtube scale: 10-50 scfh
    - safety relief valve: 60 psig

    Do you think I need to adjust the preset pressure screw to compensate for using lower density argon?

    You got me. I would simply hook it up and give it a try. The only adjustment on my flowmeters is the scfm flow rate.

  5. #5
    Join Date
    Jun 2007
    Location
    Camden, SC
    Posts
    156

    Default

    Quote Originally Posted by mk10 View Post
    The regulator that I have is a Victor HRF2380--the HRF2325 is its argon counterpart. The differences between the two seem to be:

    co2
    - preset outlet pressure: 80 psig
    - flowtube scale: 8-28 scfh
    - safety relief valve: 150 psig

    Argon
    - preset outlet pressure: 25 psig
    - flowtube scale: 10-50 scfh
    - safety relief valve: 60 psig

    Do you think I need to adjust the preset pressure screw to compensate for using lower density argon?
    You're going to need a bottle adapter regardless, and that should take care of your preset pressures. You're still going to be doing some guess work on your HP gauge though.

    Clint Baxley
    Baxley Welding Service
    Rembert, SC 29128

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