The ratio is 1.5 to 1 --- oxy to acetylene
Acetylene psi is based on the size of the cutting torch... I have a small cutting torch that I run with about 5 psi... but it's a very small tip.
Remember to turn the OXYGEN OFF first when done. So it's the reverse of starting out... where you turn the acetylene on first...
So light it up -- then add oxygen to bring to a nice flame - then test with the cutting handle --- so leave yourself a little "room" on the flame before you hit the cutting oxygen on.
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