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Topic Review (Newest First)
01-08-2012 07:04 PM
matts37chev
Quote:
Originally Posted by Irelands child
That's what I remembered as well. I was just hoping that my memory was wrong and that I could use lots less now that I'll have a controllable flow device. The price of C25 has gotten into the $40+ range locally for my 55cf tank
you would do fine with the bottom side of 20, somthing like 17-19 I am sure would be O.K.
01-08-2012 12:36 PM
oldred As Matt said about 20 CF to start but just like a regulator every rig will have different requirements. Use the same method as adjusting a regulator, while welding on a piece of scrap slowly tun down the gas flow until porosity appears then turn it back up a couple of CF. You may find you need more than 20 CF and if so make sure the nozzle is sealed good at the back and not siphoning air into the flow ( a common problem that can cause a mysterious porosity problem) but you may also find you don't need quite that much flow. In that case you can save a lot of your gas over a few hours of welding since even a few CF of wasted gas adds up in a hurry, but again like Matt already said about 20 CF is most likely going to be the magic number.


BTW, you are much better off with that flow meter than a regulator anyway so you are upgrading your equipment not just replacing a broken part!
01-08-2012 11:44 AM
Irelands child
Quote:
Originally Posted by matts37chev
I would think about 20 cfh for the doors closed
That's what I remembered as well. I was just hoping that my memory was wrong and that I could use lots less now that I'll have a controllable flow device. The price of C25 has gotten into the $40+ range locally for my 55cf tank
01-08-2012 10:56 AM
matts37chev I would think about 20 cfh for the doors closed
01-08-2012 09:55 AM
Irelands child
MIG regulator just quit

I went to do a small welding job - turned on the gas. NADA. The regulator had died - actually had moisture in it. I was able to 'poke around' it's innards to make it work just long enough to do my little project. Since then, I have ordered a low end HTP flow regulator off EvilBay to replace the regulator. My question, what is the C25 flow supposed to be, no wind in my shop, (just normal hot air) ?

Dave W

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