When starting I set oxycon on 1.5 lpm (with oxy valve on the torch fully open). Then open gas valve a bit and light the torch. Then I set oxycon to 4 lpm and adjust gas valve to bigger flame. I work on NG/5lpm oxycon, no problems with flame or oxycon. At the end of torching I shut off the gas valve on the gas line first, then shut the gass off at the torch (to bleed gas hose). Then set oxycon back to 1.5 lpm and shut it off as well. I keep oxy valve fully open at the torch at all times and regulate oxy flow on oxycon, not the torch. I am trying to be easy on my oxycon, took me a while to find used one in good condition.
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