Torch pressure settings

Refer to your manual or a standard guide such as Victor's little yellow welding and cutting guide for exact pressures to match your tip size and the stock on which you are working. Higher pressures will not replace a clean tip and the proper type of flame setting.

Although 4:1 rule for pressure setting are fine for 25ft of hose, it's when your 200ft out there that you need the extra pressure for the line loss.

I do however disagree with a 1:1 ratio for brazing. Where as welding on heavy plate a 5psi Acetylene setting will work out just fine but a 5psi Oxygen setting would not be enough volume.

There is nothing wrong with running a higher pressure setting as volume is regulated at the mixing chamber valves.

Sorry had I seen your post earlier I would have responded.

T_Bone

I have two pressure settings.

For cutting 40psi Qxy and 5psi Actylene

For brazing 20psi Oxy and 5psi Actylene.

Don't matter if I'm welding or cutting 20ga to 1-1/2" thick metal or using 25ft of hose or 200ft of hose.

For over 35yrs these are the only settings I've used.

You might want to do a search on this website as there's been alot written about cutting and brazing this year. Alot of good info.

T_Bone

For cutting: Acetylene between 5 and 10 (deepending on thickness of metal), and oxygen at 25-50. Setting flame is more important than actual output pressures. For normal cutting you want a neutral flame. Depends on number of oxygen knobs you have. If a 3 knob torch open handel oxygen valve fully and close torch tip valve fully. Adjust with valve on tip.

Light acetylene flame and increase gas at handel until flame begins to "blow", lookkind of like a light bulb. Begin cutting oxygen in. Flame will get bright white (carbonizing), keep cutting oxygen in until a withe feather forms inside a blue flame, keep adding oxygen and the feather will disappear leaving blue points on th ecutting tip. Flame is right when the feather is gone and points are round on the ends. If you get too much oxygen the flame will hiss and the blue points will be sharp. Shut down is acetylene first, them oxygen.

john