Oxygen Regulator w/mix ?

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I have this Uniweld Oxygen regulator, that I would like to use on a Argon/Co2 mix bottle. I have found an adaptor that mates Cga 580 (bottle) with cga 540 (reg), but is there some safety concern I am missing? Or is there some kindve atomic size thing that makes an oxy regulator useless for Argon/co2 mixes?This regulator was supposed to be the nitrogen version but e-pay seller juked me Attached Images"after a long day of doing nothing...its gooood to kick back" Pumbaa
Reply:How would you regulate gas flow. Typically "flow regulators" have an orfice that is engineered to provide a fixed amount of flow at a certain regulated pressure, and back pressure. Very simply put the amount of flow is equal to the squareroot of the pressure differential accross the orfice. An oxygen regulator doesn't regulate flow, it only regulates pressure. Look at the output guage on the regulator. It's probably just has PSI, while a flow regulator that has a flow orfice has calibrations in PSI, and flow in CFH. the orfice's are calibrated for certain gases, like C25, or 100% CO2. The face of the guage will say what gas it's calibrated for.
Reply:Originally posted by fla jim How would you regulate gas flow. Typically "flow regulators" have an orfice that is engineered to provide a fixed amount of flow at a certain regulated pressure, and back pressure. Very simply put the amount of flow is equal to the squareroot of the pressure differential accross the orfice. An oxygen regulator doesn't regulate flow, it only regulates pressure. Look at the output guage on the regulator. It's probably just has PSI, while a flow regulator that has a flow orfice has calibrations in PSI, and flow in CFH. the orfice's are calibrated for certain gases, like C25, or 100% CO2. The face of the guage will say what gas it's calibrated for.
Reply:Welcome to the wonderful world of E-bay. A while back I got burn't on a so called "South Bend" steady rest.How accurate do you have to be on you gas flow. I'm not a precision weldor. I just set the C25, and Argon on my MM210 to 20CFH and forget it. I haven't found the need to mess around with Spray transfer for steel.Last edited by fla jim; 02-13-2004 at 10:43 AM.
Reply:Originally posted by fla jim Welcome to the wonderful world of E-bay. A while back I got burn't on a so called "South Bend" steady rest.
Reply:Since you want to use it on C25, I'll presume you are using it on a MIG machine.Generally, there will be a flow regulating orphice on the MIG machine, in the lo pressure gas circuit.  MIG regulators are generally equipped with a LP gague that is calibrated in CFH, even though the gague itself is #s/si.  That's just a cheap way for the manufacturer to make you think you have a flow gague.The orphice between the bottle regulator and the machine regulates cfh, not the bottle regulator.  You get more cfh thru the orphice at 15psi than you do at 5psi, as a simple matter of physics.It's real simple to determine if your machine is equipped with an orphice or not, just hook up to a tank, and pull the trigger.  Without a flow control orphioce, you'll have a hurricane coming out of the gun.  With the orphice, you'll have a gentle breeze.Appreciation Gains You Recognition-