With your torch off, open the oxygen valve on your torch all the way and then turn on your concentrator. Set the flow on the machine to 5 LPM (or whatever your machine is rated for). Light your torch (you can turn the oxy valve off briefly to light the propane first). Adjust your oxygen with the valve on your torch. Keep in mind that sometimes, getting an oxidizing flame will mean turning your propane down instead of turning your oxygen up.
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Kimberly
working glass since 1990 - melting it on a torch since 2002
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