Depends on the torch, I don't remember the two popular types, but one is a draw through the other is a blow through or something like that. Good news is that the pressures aren't that much different. Start with around 4-5 psi on the acetylene and 12-15 psi on the Oxygen. If you are cutting, make sure you turn the Oxygen on full blast at the lower gas valve on the torch handle and control Oxygen flow with the upper mixing valve. When you press the cutting valve, that lets the full Oxy flow through the center orfices of the torch tip to blow the slag out of the way for a clean cut.
