[TheForge] Oxy/Propane reprise

[Paul N]

probably based in the assumption that I knew what I was doing :-)

I looked back in the earlier messages, and yes you did raise that issue. 
  But I don't think I quite understood the mechanics, and probably still 
don't. I hadn't had an opportunity to drag my stuff out again yet, and 
my wife has this thing about my lighting fires in the house.

I'm still a little unclear on the 2 O2 valves. I had assumed that the 
bottom valve controlled the mixture of the preheat, which left the other 
for the cutting jet. Obviously, that's not the way it works.

I'd been looking for a schematic of the torch "plumbing" to help me 
understand it better. While I only spent a few minutes web searching, I 
haven't found anything yet.

Thanks for contributing to my non-destuctive education.
**Paul



Peter Fels & Phoebe Palmer wrote:
> That's what i was trying to say earlier.
> 
> Paul N wrote:
>> This may be another "Ah Ha!" moment. I had thought the O2 valves were 
>> the other way around. I had assumed the one by the lever was the cutting 
>> jet. Which means I just got lucky in being able to cut at all.
>>
>> I'll definitely try this procedure. Thanks loads!
>>
>> Andy Gladish wrote:
>>> Something you wrote makes me want to make sure you know the basic  
>>> adjustment: Start with the fuel valve at the base of the torch closed all  
>>> the way and the oxygen valve at the base open all the way, and the oxygen  
>>> valve by the cutting lever closed all the way. (the O2 valve at the base  
>>> of the torch is the one that feeds the cutting lever, not the one by the  
>>> lever- that one feeds flame adjustment.)
>>> crack the fuel valve, just enough to light with your sparker.
>>> Open fuel valve until the flame just starts to jump off the tip, just a  
>>> little, then back off just a tad so it's stable.
>>> Open the O2 valve, the one by the lever (the one at the base of the torch  
>>> is already all the way open) until the long blue center cone just  
>>> disappears into the little blue cones, now you have the correct flame for  
>>> cutting. Depending on how thick the metal you're cutting is, open the fuel  
>>> more and then re-balance the flame with the O2 valve.
>>> The torch should be MUCH louder when you pull the lever, hissing as the  
>>> higher pressure oxygen shoots out the center orifice of the tip.
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