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Old 2008-05-18, 10:21am
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Actually, when you're talking about concentrators, the pressure is not what produces the heat. Heat is more a function of flow and purity. You can have a high pressure machine run a torch, but if it puts out low LPMs, you won't have as much oxygen, in terms of volume, to mix with the propane. The same is true in regards to purity. If that high pressure machine does not have good puity, you won't have as much oxygen to mix with the propane. Pressure is important for delivering the flow. You need enough of it to push through the restrictions of the torch. You could have adequate flow and pressure to make a certain sized flame, but how hot that flame is will depend on the purity. If that flame is not hot or is chemically reducing, you may do better to have a smaller flame that is hot and clean.

For the Knight, Beth, and Carlisle torches mentioned, high flow and good purity would be more important factors than high pressure.
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working glass since 1990 - melting it on a torch since 2002

Last edited by kbinkster; 2008-05-18 at 10:31am.
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