Simple question. When the argon tank is open but the welder is off or on
but not welding, there appears to be a slow flow of argon. There does not
appear to be any leaks on the external connections. Is this normal. Is a
small amount intentionally bled off internally in the machine. If it is not
normal, any suggestions where I should look for the problem?
I think that it is common for the gauges to leak a small amount. I noticed
that my Dynasty gauges went to zero if I left them pressurized with the tank
valve closed tightly. I double checked all the fittings and could not find
any leaks. Just remember to close the tank valve when done. Sometimes I
remember to bleed them off before shutting the machine down and sometimes I
don't. They are always back to zero the next day.
Happens to me too figured it was dried out seals on an old MIG machine.
Recently got a new machine, does the same damn thing. None of the
ecternal connections is leaking, don;t know about the gauges themselves
Probably a gas company and gauge/welder company conspiracy! :)
Following on from all in this thread about "slow Argon leak".
I was trying to find out where the leak was, regarding Argon to my TIG
Went to pneumatics place and was saying wanted these fittings to
pressurise my hoses and look for leaks. Guy disappeared off for a
couple of minutes and came back, told me this:
"Argon will find leaks in hoses which are sealed to compressed air."
Helium is terrible for finding leaks to get out of. Argon is
apparently not far behind. Guess the principle is - Argon and Helium
are inert gases. Gases like hydrogen form H2 molecules, oxygen forms
O2 mol's, etc. Certainly Helium does not form molecules. Guess
Argon's the same. Those little single atoms are going to find smaller
"leak paths" than a diatomic molecule which needs a bigger path to see it
as a "leak".
Was told - this is why there are these all-encasing brass
crimp-fittings for Argon lines. The tube is something slightly, but
not hugely, special, as well.
Turn the Argon off when you are not using the welder and the leakage
you get is minimal compared to the legitimate consumption.