Arya Ebrahimi said:
Set your act regulator to about 5psi, your oxy reg to between 10-15psi.
Ary
a couple things to expand on...keep the regs loose, like wound down to 0psi when not in use.....you never want to open a bottle with the reg turned up. It's hell on the internals.
crack the valve on the acetylene bottle....1/4 to 1/2 turn, then open the oxygen bottle wide open.....then set the regs as Arya said....
NEVER turn the acetylene reg above 15PSI.
high pressure acetylene is unstable and spontaneously explosive.
Keep the acetylene bottle vertical. The acetylene is dissolved in acetone (liquid) and the acetone is held in a media, like fiberglass.....if the bottle is tilted to transport, stand it up and wait a while for the acetone to run down out of the valve before opening the valve or you'll shoot acetone out at high pressure......
when you're ready to go (bottles open and regs adjusted), open the fuel valve on the torch, light it, then bring up the oxygen untill you get your neutral flame., open the cutting valve and readjust.....
a tip for cutting....similar to plasma cutting, watch the sparks/slag from the bottom......if your sparks are shooting back toward the direction you're coming from, you're going too fast.....if the sparks are going straight down, you doing good, or maybe slow...speed up untill you see the sparks barely tip back, then slow up a bit.
make sure you have flashback arrestors/check valves installed.....if you hear popping and cracking, you're too close to the work and overheating the tip and the gas is igniting INSIDE the tip.....if the torch goes out, then you're WAY too close......a couple cracks following by a whining noise means you're burning gas in the hoses and it's headed for the bottles....should never happen if you have flashback arrestors installed, but be forewarned.