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2010-10-24, 7:42pm
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Sheryll
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Join Date: Jun 13, 2006
Location: San Jose
Posts: 1,928
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Oxy Con Adapter for Benzomatic Torch?
Hi Everyone,
My husband is trying to do some metal brazing with a Benzomatic, Model - OX2550KC torch. He's wondering if there's some way to be able to use my oxygen concentrator for the oxygen - he's just going through oxygen bottles faster then he drinks beer. Is there some sort of adapter or connector that he can use? This would help save time and $$$. Thanks so much!
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2010-10-24, 9:53pm
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Senior Member
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Join Date: May 04, 2007
Location: San Jose, CA
Posts: 1,212
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How much oxygen is in one of the small bottles? And, how long does it take to use one up?
With that info, you can determine the oxygen 'flow rate' to the torch, and compare that to your oxycon.
Malcolm
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ARTCO
Artist's Reliable Tool Company
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2010-10-24, 10:08pm
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Sheryll
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Join Date: Jun 13, 2006
Location: San Jose
Posts: 1,928
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Hi Malcolm,
He says there's 1.1 cu ft of O2 in a small bottle and he goes through that in ~15 minutes.
Huh? Not sure if its due to sleep deprivation (see family room thread) but I don't get it. Would there be an adapter that he can use for the torch to use the oxycon?
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2010-10-24, 10:26pm
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Alaska Boro
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Join Date: Dec 10, 2009
Location: Anchorage, Alaska
Posts: 1,065
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The common medical concentrators output oxygen in the range of 5 to 9 psi. Some of the units that are made specifically for lampworking can have higher output pressures. What is the pressure that is available from the present Benzomatic?
If the system is in use that much, one suggestion would be to upgrade to something a bit more on the industrial side (welding) with larger tanks that will better fit your needs. Some used items at reasonable prices can be found, at times, on Graig's List.
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2010-10-25, 7:31am
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Gentleman of Leisure
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Join Date: Jun 10, 2005
Location: A Little Bit West of Yosemite Valley
Posts: 5,200
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Quote:
Originally Posted by Alaska
The common medical concentrators output oxygen in the range of 5 to 9 psi. Some of the units that are made specifically for lampworking can have higher output pressures. What is the pressure that is available from the present Benzomatic?
If the system is in use that much, one suggestion would be to upgrade to something a bit more on the industrial side (welding) with larger tanks that will better fit your needs. Some used items at reasonable prices can be found, at times, on Graig's List.
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Agreed....
Dale
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San Francisco - A Few Toys Short of a Happy Meal
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2010-10-30, 9:10am
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PyronamixK
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Join Date: Jun 24, 2005
Location: Spatula City
Posts: 4,196
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Well, 1.1 CF per 1/4 hour is 4.4 CFH (cubic feet per hour). That is roughly 2 LPM. So, flow-wise, your concentrator would be able to run it. I haven't done any brazing with a Benzomatic, so I don't know if it requires a high psi to deliver the oxygen. It's worth a try.
If you have a concentrator with the threaded metal outlet, that outlet fits the b-fitting of a 1/4" ID green oxygen hose. I don't know what size hose he uses with his torch. It might be smaller. He could probably get an adaptor at the welding supply store.
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Kimberly
working glass since 1990 - melting it on a torch since 2002
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2010-10-30, 12:36pm
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Gentleman of Leisure
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Join Date: Jun 10, 2005
Location: A Little Bit West of Yosemite Valley
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This the torch set in question. And by its design does NOT lend itself (very well) to modifications...
Dale
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San Francisco - A Few Toys Short of a Happy Meal
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2010-10-30, 4:24pm
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PyronamixK
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Join Date: Jun 24, 2005
Location: Spatula City
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How would that be any less adaptable than the Hot Head torch?
Does it require a high pressure from the tank to function correctly? I wouldn't think that it would need the high velocity like the Hot Head does to draw in room air for combustion since it is using oxygen, but again, I have never used this torch so I don't know.
Interesting. If it is indeed set up so that it cannot be run any other way (and it looks like they sell the fuel and oxygen canisters to support that need, so maybe it is a synergistic setup), then your husband might be better off buying a different torch that could run from a larger oxygen tank or a concentrator. Even the propane would go quickly if you were limited to those little canisters. He might do better to use a larger tank and longer lines.
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Kimberly
working glass since 1990 - melting it on a torch since 2002
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2010-10-31, 8:54pm
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Senior Member
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Join Date: May 31, 2009
Posts: 368
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The thread on those tanks is 1-20 LH. You would need a 1-20 LH to nipple fitting.
I have done quite a bit of brazing with my national 3a. I like to use a lot more than 2lpm, so I think your husband would like the extra oxygen. If he does a lot of this, you might consider getting a National 3a. Both of you can use it for glass and metal. I would recommended the OX-3 tip for both of your uses.
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Melting boro with a National 3A and and two Devilbiss 5lpm 10psi concentrators.
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