Question, What Pressure Oxy Acetylene
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    Carvel Loafer's Avatar
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    Question, What Pressure Oxy Acetylene

    I am setting up an old oxy/acetylene torch that has been kicking around for years. The cutting torch is a Victor. I'm not sure how to identify the size of tip but it is smaller than what I used to use as a young fella when I knew everything.

    What settings do you suggest I start playing with. I did set the acetylene to about 7 lbs and the oxy at about 15. Cutting 1/8" steel and it pops back a lot.

    I'll try some YouTubes later but thought I would go the guys who really know first.

    Click image for larger version. 

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Question, What Pressure Oxy Acetylene

    My go to is 7-10 psi on the acetylene, 30-40 on the oxygen. Then I'll adjust from there.
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    I usually set ~ 12-15 PSI for the Acetylene and ~ 35 PSI for the Oxygen. Depends on what thickness material I'm cutting though. For lighter material 8-10 PSI on the Acetylene will be fine. It takes some practice but if your tip is dirty or mixture is too lean (too much Oxygen) it will tend to pop. I usually turn the Acetylene up to just beyond where it smokes, then back it down to a nice clean burn. Then turn the Oxygen up until I get a bright blue bud and then back it down a bit as well.
    Last edited by Superglidesport; 08-08-2015 at 11:16 AM.
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    Those pressures are certainly in the ballpark, and should be pretty close. You could try a bit more oxygen pressure. If you've used oxy acetylene before, you know all about adjusting for a neutral flame. Make sure your tip is clean and don't get too close to the work piece.
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    Learning how to read the flame and adjusting it is key to running a torch. Tip selection for the material you're working with is also something to pay attention to.
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    Carvel Loafer's Avatar
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    Thanks for the input. It looks like I was a little low on both fuel and oxy . I'll play with thar a little.

    It's an older set up and has no check valves, they should be easy to find.


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    My gas settings

    I run 7/30 mix on my torch. You need to have a good clean tip to make good cuts. You should then set the knobs so you get a sharp dark blue flame with no faint trails. I know I have my torch set right when I can pull the trigger and be able to play a tune with it and see the two lines from the blow hole. With a good clean tip and setup i can cut as good as a plasma with little to no slag on metal
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    Quote Originally Posted by Carvel Loafer View Post
    I am setting up an old oxy/acetylene torch that has been kicking around for years. The cutting torch is a Victor. I'm not sure how to identify the size of tip but it is smaller than what I used to use as a young fella when I knew everything.

    What settings do you suggest I start playing with. I did set the acetylene to about 7 lbs and the oxy at about 15. Cutting 1/8" steel and it pops back a lot.

    I'll try some YouTubes later but thought I would go the guys who really know first.

    Click image for larger version. 

Name:	uploadfromtaptalk1439049724569.jpg 
Views:	35 
Size:	481.6 KB 
ID:	50010

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    10 - 12 on the acetylene and between 30 - 40 on the oxy are good points to adjust from.

    Get a torch tip cleaner from a welding supply shop and use it.
    They're cheap and make a big difference.
    A wire brush across the tip, now and again, helps also.
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    I always set mine at 8-OXY / 40-Acetelyn, works fine for me, even if i'm using a "rosebud" tip.
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    Quote Originally Posted by Bill Berger View Post
    I always set mine at 8-OXY / 40-Acetelyn, works fine for me, even if i'm using a "rosebud" tip.
    I am certainly no torch expert but aren't your number backwards?
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