? on O/A torch regulator

[chris madden]

I have a radnor torch kit and in the manual it all go's by cubic feet per hour and on the reg it go's by kpa and psi is kpa the same as cubic feet per hour?

[Donald Branscom]

Nice shop ! Very nice.

About your question.
PSI,KPI (metric) and cubic feet are all used, but different.
The regulator usually shows two scales.
as far as the torch setting for actyelene Obvioously NEVER exceed 20lbs pressure.
Thats why the actylene shows a red zone on the guage.

The torch settings for the size of tip or cutting torch should be listed in your owners manual but if not, any welding store has a small pocket guide that you can get as a reference.
Also when adjusting the flame on the cutting torch, fine tune the shape of the pointed flame with the cutting lever depressed.

Never get any petroleum product near your oxy rig.
Not being condescending, just covering the bases.

[Sandy]

I have a radnor torch kit and in the manual it all go's by cubic feet per hour and on the reg it go's by kpa and psi is kpa the same as cubic feet per hour?

Kilopascal(s), kpa, is a pressure scale also. Some of the Aussies here can probably give you a good run down of kpa and settings.

[William McCormick Jr]

Originally Posted by chris madden

I have a radnor torch kit and in the manual it all go's by cubic feet per hour and on the reg it go's by kpa and psi is kpa the same as cubic feet per hour?

According to Wikipedia 1 kpa equals 0.14504 psi.

It has nothing to do with cubic volume in itself. But if you know your pressure and your orifice and what you are putting through the orifice, you can conclude the cubic feet an hour in conjunction with the pressure.

Sincerely,


William McCormick

[chris madden]

so I sould go off of psi ?

[Sandy]

so I sould go off of psi ?

Most of the tip charts I've seen are referenced in psi. PSI is the US standard (still) . All of the talk you hear will be in psi.

[chris madden]

Originally Posted by Sandy

Most of the tip charts I've seen are referenced in psi. PSI is the US standard (still) . All of the talk you hear will be in psi.

ok thanks

[William McCormick Jr]

Originally Posted by chris madden

ok thanks

I was taught this by my father.

You start at seven psi of acetylene at the regulator. You start at 40 psi at the regulator for oxygen. For cutting this works well. And you can also use a welding torch tip as well at these pressures.

I was taught to light a torch by my shop teacher actually. He said you turn up or down the acetylene till the flame just does not leave the torch.

Add oxygen until you get neat needle blue flames. But no harsh sounding or vibrating blue needle flames.

Shut off the acetylene first when you are done.


Sincerely,


William McCormick

[chris madden]

Originally Posted by William McCormick Jr

I was taught this by my father.

You start at seven psi of acetylene at the regulator. You start at 40 psi at the regulator for oxygen. For cutting this works well. And you can also use a welding torch tip as well at these pressures.

I was taught to light a torch by my shop teacher actually. He said you turn up or down the acetylene till the flame just does not leave the torch.

Add oxygen until you get neat needle blue flames. But no harsh sounding or vibrating blue needle flames.

Shut off the acetylene first when you are done.


Sincerely,


William McCormick

would that be the same for a 10-mfa ?

[Sandy]

Originally Posted by chris madden

would that be the same for a 10-mfa ?

Here's what radnor recommends for the fuel: http://www.airgas.com/browse/product...2&WT.svl=30872


You'd would be best served if you could get a full set of charts and/or settings for the outfit you bought. I'd bet your dealer would be glad to assist next time you're in there.

Please be carefull with the heating tips vs time run. Knowing that usually more than three to five minutes is a long run time for most small shop applications is the only solice some of us get here on the safety side, please ask if you intend on doing something other than small heat and bend jobs.

[William McCormick Jr]

Originally Posted by chris madden

would that be the same for a 10-mfa ?

I don't know that particular tip, however I know my acetylene adjustment on my torch still has more to go at 7 psi, when I use my heating tip. I can knock the flame off the head.

I cannot imagine needing that extra five psi. But as I said I never used that tip. If the flame would not come off the torch head at 7 psi, then I would say yes, it needs more acetylene pressure.




Sincerely,


William McCormick

[clark-kentski]

Cris that 10 mfa is a pretty good size rosebud.What size acetylene tank do you have? there is a saftey rule that says do not use more than 1 seventh of your tanks capacity per hour! if no one else post first ill look up the settings for that tip for ya in the morning,be safe

[clark-kentski]

Good morning, from the Victor manual type mfa heating nozzles tip size 10 acetylene12-15 psig oxygen 30-40 psig acetylene cubic feet per hour is 30min. 100max. as you can see it would be easy to break the 1/7 rule. personally i use a #6 tip,be safe

[Go1lum]

Originally Posted by William McCormick Jr

I was taught this by my father.

You start at seven psi of acetylene at the regulator. You start at 40 psi at the regulator for oxygen. For cutting this works well. And you can also use a welding torch tip as well at these pressures.

I was taught to light a torch by my shop teacher actually. He said you turn up or down the acetylene till the flame just does not leave the torch.

Add oxygen until you get neat needle blue flames. But no harsh sounding or vibrating blue needle flames.

Shut off the acetylene first when you are done.


Sincerely,


William McCormick

I hope you wern't doing that with an equal pressure welding torch.

[William McCormick Jr]

Originally Posted by Go1lum

I hope you wern't doing that with an equal pressure welding torch.

The three hose torch?

I have never used one. But I have heard that you are supposed to light them with both the oxygen and acetylene on. Don't know why, but then I have never used one.


Sincerely,


William McCormick

[Jolly Roger]

NEVER EVER EVER EXCEED 14 PSI ON ACETYLENE!!!!!!!!!!!!!!!!!!!!! Acetylene becomes unstable at 15psi. This means it can go BOOM all by itself killing you or someone else. You should never need more than 10psi on acetylene. Cubic feet per hour is normally used for shielding gases and requires a flowmeter. Your oxygen should be set at 35 to 40 psi.