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Gentlemen, I need to mix up some 75/25 CO2- argon mix. As I understand things, if I just put 750-psi CO2 and 250- psi argon in a bottle it doesnt come out 75/25 because of the different molecular weight of the gasses. So does anyone know the conversion factors? Any ideas? Thanks, Mike
Reply:How are you measuring the partial pressures of the gases you are putting into a common container?You won't need the mix to be quite so precise for steel welding anyway, if that's your aim.Why exactly is it not more feasible to just buy the correct mix?
Reply:I believe the method commonly used is to connect the two gases through a "Y" or "T" connector and regulate the individual flow rates to produce the desired ratio. So, if you want 30 cubic feet per hour (cfh) flow rate at the welding nozzle, you would run (30 x .75) = 22.5 Argon and (30 x .25) = 7.5 CO2. The difficulty here may be that your common welding flow meter may not be very precise/accurate at a low flow rate.
Reply:First of all I just read my original post and it should read 750psi Argon 250psi CO2! I have a fitting with gage to fill bottles. I am mixing my own because I have a large, possibly lifetime, supply of Argon and CO2. I have mixed on the low side but it is inconvenient to need two bottles, my rig holds one. I know that it is not critical but I would like to know how this works. Thanks again, Mike |
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发表于 2021-9-1 00:16:09