Problem is, when you're using 25% argon/75% CO2, you're also releasing 3 times as much CO2 as you are argon. In a confined space, that CO2 will displace the available oxygen...THAT's where the need for ventilation comes into play, because it's the CO2 removed from the bloodstream via the lungs that the body expels, and the body seeks to replace that with oxygen-rich air....which it can't get in a CO2-rich atmosphere.
I'm not a doctor, and I don't play one on TV...but I have welded with Ar/CO2 mix.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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