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| Tips, Techniques, and Questions -- Technical questions or tips |
2008-03-04, 7:53am
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Senior Member
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lpm to psi ratio?
Can anyone tell me how many lpm translates into how many psi? I'm trying to hook up a Carlisle minicc and I have 2 Air Sep oxycons. The instructions say to set the air to 25 psi. If 5 lpm equals 10 psi then 2 oxycons isn't enough... 
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2008-03-04, 7:56am
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ManBearPig
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They don't translate. They aren't the same thing. LPM is Liters Per Minute, which is flow rate. PSI is Pounds Per Square Inch, which is pressure.
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2008-03-04, 8:00am
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Any idea what to set the lpm at, then? please...
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2008-03-04, 8:11am
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Usually I dial the output back about .5 LPM or so to increase the purity a bit. With two 5 LPM machines set at 4.5 LPM this would give you 8.5 to 9 LPM of oxygen which should be good for a MiniCC. Most concentrator have a fixed pressure from 7 to 9 PSI. You do not gain any pressure by combining machines, in fact you will probably lose a bit of pressure.
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Paul Ewing
Torch Ho... GTT Mirage, Carlisle CC, GTT Cheetahs, GTT Lynxes, and others on tanked O2.
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2008-03-04, 8:17am
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ManBearPig
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You never want to run a concentrator at maximum output. They are already less pure than tanked oxygen, and the higher the output the more impure the oxygen becomes. On a 5 LPM machine, I never run them above 4 LPM.
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2008-03-04, 8:31am
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I run my 5 lpm machine at about 3 - 3.5 for NG and a Betta. Works fine there, but much higher and it starts to lose the purity needed and the flame goes into reduction.
Robert
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2008-03-04, 9:05am
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traumaqueen
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You can run a mini cc on one concentrator just fine. Turn it up to 5 lpm and you are all set.
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2008-03-04, 9:09am
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Quote:
Originally Posted by Paul Ewing
Usually I dial the output back about .5 LPM or so to increase the purity a bit. With two 5 LPM machines set at 4.5 LPM this would give you 8.5 to 9 LPM of oxygen which should be good for a MiniCC. Most concentrator have a fixed pressure from 7 to 9 PSI. You do not gain any pressure by combining machines, in fact you will probably lose a bit of pressure.
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Hmm. So then what's the point of hooking up 2 concentrators?
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2008-03-04, 9:12am
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ManBearPig
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Increased flow rate. Especially on a Mini CC. They don't run well at all on a single concentrator. It's hard to get a good hot flame without going into reduction on a single concentrator.
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2008-03-04, 9:35am
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thanks!!
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2008-03-04, 9:53am
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traumaqueen
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Quote:
Originally Posted by lnew
Hmm. So then what's the point of hooking up 2 concentrators?
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you can work with boro  ( small beads and pendants and stuff)
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2008-03-04, 10:31am
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Missing presumed fed
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Quote:
Originally Posted by lnew
Hmm. So then what's the point of hooking up 2 concentrators?
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You may lose a little pressure, but you'll gain volume. In other words, the gas might not be flowing quite as hard, but more gas will be flowing out. Trust me -- you'll like it better with two. (If you want, you can turn one of them off and try it, then turn the other one back on. I think you'll appreciate the difference! If you're not used to working on a propane/oxygen torch, though, wait until you've gotten a feel for it. At the beginning, it's going to feel very different from a HotHead no matter what's hooked up.)
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2008-03-04, 8:22pm
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Quote:
Originally Posted by Emily
You may lose a little pressure, but you'll gain volume. In other words, the gas might not be flowing quite as hard, but more gas will be flowing out. Trust me -- you'll like it better with two. (If you want, you can turn one of them off and try it, then turn the other one back on. I think you'll appreciate the difference! If you're not used to working on a propane/oxygen torch, though, wait until you've gotten a feel for it. At the beginning, it's going to feel very different from a HotHead no matter what's hooked up.)
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Actually, I was on a bobcat, and yes, it sure is different!!
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