The Shop > Tools
Compressed Air Propane Torches
vtsteam:
Bill, thanks for the photos. Still trying to figure out what you have. Please correct if I'm wrong anywhere here:
1.) You are using a welding torch body, and using compressed air and propane (what regulator pressures?) into that body.
2.) You are using a #5 welding tip (what brand type) to which you soldered a 5/16" long brass flare nut (drilled .040").
3.) You used a jet orifice from a Turner atmospheric propane torch, and bored (turned?) that and threaded to fit the flare threads.
4.) You taped over the atmospheric air orifices in the original torch flare.
You have something called a rosebud -- not sure if that's a different torch flare and orifice, or an actual welding rosebud for the torch body?
ps. Bill, I hope you're using torch body and tank flashback arrestors if you're experimenting like this. Too slow a flame speed along the chain of various parts can produce ignition there and or flashback. Not trying to discourage you, just makng sure you're playing it safe. Also tape isn't a good idea.
Orange Alpine:
vtsteam
1. Correct. Pressures do not seem to be critical. Currently using 8psi propane and about 20 psi air.
2. The wleding tip size is immaterial. I gave the tip # in an attempt to further identify the set up. The tip has been cutoff and the thing is used as a method to connect the Turner nozzle to the acetylene torch. The 5/16" flare nut was drilled oversize about .040". From .320" to 359" to fit over the welding tip. Also about 1/8" was removed from the threaded portion of the flare nut.
3. All oricies are removed from the Turner torch. The base of the torch is solid brass and has plenty of "meat" to be turned and threaded 1/2"- 20.
4. Correct.
The rosebud is an outsized propane torch that I pick up from a bargain table several years ago. It is designed and made exactly like the smaller Turner burners. That is all I know about it. I removed the orifice.
I am using tank flashback arrestors. Was not aware there are similar items for use at the torch. I agree tape is not a good idea, but I thought it was good enough for a trial run. The nozzles run so cool under the test conditions (no heat blowback) the tape never even got soft. But I'm going make some sleeves (maybe out of copper plumbing fittings?) and solder them on.
A couple more pictures. First includes the rosebud to give you an idea of its size.
Bill
vtsteam:
Thanks Bill, that clears it up for me.
Have you tried brazing anything yet w/brass filler rod? I ask, because that's the grail for me on an air/propane torch. If it can brass braze parts readily in open air, that would be a reason to make one.
Orange Alpine:
No, I have yet to do anything worthwhile with the torch. I have reported on almost everything I have done with it. This idea came to me suddenly and I sort of squezed it in between other activities.
I have a fairly long and sad history with brazing, so it's not likely to happen anytime soon. I find it strange as I am proficient with solder. Maybe the more diffuse heat will be of benefit.
If you have propane nozzles of this configuration, give it a try. You can lash up a test rig in pretty short order and you don't have to destroy anything.
Bill
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