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I cannot get a neutral flame on my oxy/acetylene setup no matter where I set the regulator pressures.
metalmad62 - Saturday, October 22, 2011 - 11:18amWelding
Last year I purchased a small Oxy/acetylene kit from Praxair. The type with the MC sized aetylene bottle and victor torch. My desire was to produce weld sculpture using 1/8 thru 1/4 inch steel rod. However after burning thru much rod and many tanks of oxy/acetylene I quit in frustration. There are no colleges locally offering Oxy/acetylene training. I figured I just didn't know what I was doing which is still probly true.
After much reading and youtube videos I picked the torch up again this past month. I set everything as I had seen and read but the flame I got looked nothing like the ones on any of the vids or those described in any literature. I keep getting a blue white cone kinda sharp looking, with a lead flame being yellow orange. I tried various pressures from the one I had been using 5 psi oxy, 5 psi acetylene but to no avail. The tip I'm using is an "0" size.
I thought there might be something wrong with the torch mix chamber so I drove an hour to the nearest big city where there was a torch repair person. He put the torch on his system and pulled a neutral flame right away. He shut down and asked me to light the torch as he wanted to observe my method. I did so and got the neutral flame right away. He seemed satisfied with my method. He then asked me about my tank pressures and when I told him 5 & 5 psi he said your oxygen is not high enough. He then took the hose off the oxygen side of the torch and showed me a little foot valve that required pressure to move and he said there is a certain amount of back pressure to overcome thru the backflash arrestor as well. He suggested that I up my oxy cylinder pressure to 20 or 25 psi and see if this helped. He suggested if it did not I may have a faulty regulator on either side.
I went home and tried it and again to no avail, The same color flame is produced no matter what I do. It cuts off rod nicely
All I want to do is make art but I'm about ready to jump out a window. Could the regulator not be sensitive enough. Any help would be Appreciated. Goin crazy in Canada!!