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Originally Posted by MikeAurelius
A couple of thoughts --
I agree with Ron - it "can" be a problem on GTT Lynx's and above, and the way to get around it is to increase your oxygen flow with the secondary oxygen valve (blue). Having it cracked slightly open when using a small (short) flame will keep the face of the torch cool and eliminate any possibility of overheating the torch face.
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I'll second this. If you are using a torch with secondary oxy valves (like a Lynx), be sure to crack it open at least a bit. Check your torch face for changes at the seals. Discoloration is normal, but crusty stuff coming out from the seal near the tip or glowing ports could lead to a meltdown.