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Thread: Stainless steel back purging setups

  1. #1
    Registered User bang chong's Avatar
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    Stainless steel back purging setups

    I'm wondering what people have done for their setups when back purging using only one bottle? I have only ever done it at work using a separate argon bottle like I was taught.

    Will a Y piece adaptor off a normal regulator be suffice or should I run one of those dual flow meter regulators?

    Pic for reference


    Would be cool to see your own setups for home and work

  2. #2
    Registered User fantapants's Avatar
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    Have only ever done y piece of a single regulator with dual flow meters.. So long as the bottle isn't nearing empty you won't see any problem with flow drop etc. The last hour of welding on a big bottle you start to notice dips and surges in flow, but that's it.

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  3. #3
    Registered User fantapants's Avatar
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    That is how we did it at work. We did 90 percent stainless chemical and food welding so everything was purged.

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    Registered User fantapants's Avatar
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    I'm not sure if I misunderstood. But if you are thinking of using a single flow meter That Won't work at all. You need vastly different flow rates from you r torch as opposed to purge... Not sure if that's what you meant or not lol Just thought I would mention it

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    Yep, I use a twin flow reg with separate lines. You can modify a single regulator with that y piece you have pictured and just add an additional flow reg.

    Works fine.Name:  17505758_437762379892351_209595323_n.jpg
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Size:  45.1 KB

  6. #6
    Registered User bang chong's Avatar
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    Sweet thought so. Just was told by one of the guys at boc that I could get away with using a y piece on a single reg and a gas line. Ill just buy one of those regs with double flow meters.

    Cheers

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  7. #7
    Registered User fantapants's Avatar
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    Quote Originally Posted by afraid View Post
    Yep, I use a twin flow reg with separate lines. You can modify a single regulator with that y piece you have pictured and just add an additional flow reg.

    Works fine.Name:  17505758_437762379892351_209595323_n.jpg
Views: 221
Size:  45.1 KB
    Just as an aside, I used the foil wrap purge bung idea for the first time last week lol... Worked well will bang again

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  8. #8
    Registered User bang chong's Avatar
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    Quote Originally Posted by fantapants View Post
    Just as an aside, I used the foil wrap purge bung idea for the first time last week lol... Worked well will bang again

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    Haha that's the way I was taught and how we do it at work 😀

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  9. #9
    Compulsive modifier awdmoke's Avatar
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    Or rice paper for internal dams, as it dissolves in water.
    Lots of minis & mokes including a G13b powered Sports Sedan, a couple of Swift Gtis, a Goggomobil, 928S, Polo Gti, BMW 540i, a WRX and a Navara with the deadly ZD30

  10. #10
    Registered User fantapants's Avatar
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    Quote Originally Posted by awdmoke View Post
    Or rice paper for internal dams, as it dissolves in water.
    Yeah have seen some fancy stuff like that used when we weren't able to get back at the pipe... Didn't know rice paper worked, we used a fancy as Shit stuff that cost a bomb. Probably because it had to be sanitary (dairy work) ??

    There is also the brush on goo stuff? Never used it before but works the same as brazing stuff I guess?

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