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Smiths little torch & oxygen concentrator


Does any know if the smiths little torch can be run from Propane and
an Oxygen concentrator? I don’t want to invest in a bottle oxygen

Could it be used even with a compressed air supply via a small pump?
Any help or ideas would be appreciated.


Yes it works fine, I run a big glass torch on a concentrator with
propane. also I have a splitter in the lines to switch to a tank of
oxygen if I should ever need it. I love mine I have had it for about
five or six years.

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Does any know if the smiths little torch can be run from Propane
and an Oxygen concentrator? 

One of the venues where I teach in Toronto uses a concentrator
instead of compressed bottled oxygen.



I use the Smiths little torch with a No. 5 tip with an oxygen
concentrator and 1 lb disposable propane bottles. It works great.
The oxygen concentrator actually puts out a little too much oxygen.
I’ve turned the flow down to 1 lpm which is as low as I can without
the alarm going off and that seems to be just right. I don’t use a
regulator on the oxygen, just a spark arrestor (probably not
needed). The propane lasts a long time. You just have to turn on the
oxygen concentrator about 5 or 10 minutes before you want to use it
so it will produce a high concentration of oxygen and you need to run
it for least 20-30 minutes each month. With the oxygen concentrator
and the 1lb propane bottles I feel fairly safe using a spare bedroom
in the house for a shop.


Yes, michael the concentrator works on your torch, I have been using
one for about five to six years running a bigger torch for glass bead
making. I added a “y” line so I could switch to the regular oxygen if
I wanted to. that works fine. both running on propane gas. There are
several units, I am using the 5 lpm one. It does fine but the 10 lpm
would be better (for my glass torches). You don’t need the medical
unit, just the oxygen for torch work. let me know how you do.

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any idea where the best prices for the oxygen concentrators are ? Riogrande they are refurbished and run around 400-780 USD…prices from different sources are also in the “several of thousand dollars each” One friend of mine inherited one concentrators from his daughter who is a glass bead/ass’t…so a glass supplier might have them as well I suspect?

I use a Smith little torch and oxycon, works great :). I bought mine for 200€ from the daughters of an elderly gentleman who had passed away. It may be worth looking in your local classifieds to see what’s available!

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Look for a local medical device refurbisher. I bought my second O2 concentrator from a local one for $200. They are made to run 24/7, so the time that we put on them is nothing. Actually, they have to run on a regular basis or the sieves fail. You may also be able to find one used on Craigslist. My current 5 lpm O2 concentrator runs both my Little Torch and Meco Midget in tandem just fine…Rob

thanks -good

thanks for the idea

I agree with Rob here…it is illegal to resell the concentrators for medical use unless they are first disinfected and refurbished, so they usually go for cheap on the used market from relatives of the deceased. I have seen them costing from $75 to $200 on craigslist locally. Since they have an hour meter on them, you can tell how long they have been run and how much time they are likely to have left. They have an alarm that will beep really loudly if the oxygen content drops below a certain level, so you can pretty easily determine whether a used one is good when you look at it. They usually run over 10,000 hours, so as Rob says, the use we give them is minimal and they will last along time. And yes, you need to run one an hour or so every week or ten days or the sieves start to go bad. I left mine idle for too long and it started beeping and giving a low oxygen warning. Running it over and over a few hours a day took care of most of this beeping. If it beeps now, I turn it off and back on and it is good to go for another hour or so, so I’m limping along with it until it entirely gives up the ghost. Interestingly, the torch worked fine with it even when it was giving out the low oxygen warning, because that starts when the oxygen content drops below 93% and your torch will operate fine with less than that level of oxygen. If you run into one that gives a low oxygen beep, maybe you can get it for nothing and try this fix. Here ends my knowledge of these wonderful beasts…

When I was setting up the new trade shop here in the farmhouse @2 1/2 years ago, after “retiring” from working in retail stores for @45 years, I was looking for a safer way to run Oxygen and Propane.
At @ the same time I was helping a friend clean out a rental property that tenants had left trashed, and skipped out on their rent.
While cleaning out the massive mess I opened a closet and saw something that I thought might be an oxygen concentrator, from descriptions I had read here on Orchid.
It was.
I experimented, and I found that the concentrator is perfect, combined with “camp” sized propane bottles, using my Smith torch, for nearly every application I offer.
I originally stashed my heavier torches and spare Oxygen tanks nearby, just in case the new set up was not sufficient. They remain unused.
I no longer do any casting, and the tiny Smith, combined with my laser welder has been the perfect set up for the broad spectrum jewelry repair service i now offer.

I just got a 20 liter from my friend Ross at ABR imagery. Works great.

Please excuse any typos-- curse my clumsy digits…

May 6

I just got a 20 liter from my friend Ross at ABR imagery. Works great.

Please excuse any typos-- curse my clumsy digits…

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