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  1. #1
    Join Date
    Nov 2007
    Location
    Texas
    Posts
    425

    Nitrogen Flow Regulator

    My regulator died today while brazing. This was a high pressure regulator and did not work well for low pressure purging. Looking for a specific brand/model low flow device for purging/brazing. Tired of fighting with a regulator and pinhole leaks.

  2. #2
    Join Date
    Apr 2010
    Posts
    93
    I use a Turbo brand flow meter... Any one of your suppliers should carry it or one similar. Works like a charm. Damn everyone and their heavy-purge pinholes At least you've been purging, nonetheless...

  3. #3
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,560
    I use two devices.

    This one goes on the tank:

    http://www.johnstonesupply.com/store...odH26-212.html

    and this one attaches to the first one.

    http://www.johnstonesupply.com/store...odH26-625.html

    then the hose attaches to the second device.

    You run a few psi out of the first regulator, and then adjust the flowrater to raise the ball about an inch or so in the tube. You leave at least one port open, with the valve core out so thew N and acrid gasses have a place to go.
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  4. #4
    Join Date
    Dec 2011
    Location
    Twin Cities Minnesota
    Posts
    278
    I use the flow meter design,talked to factory rep at 410a seminar about "pinholes". He says to barely lift ball off its seat.Use as little nytro as needed.

  5. #5
    Join Date
    Jun 2012
    Location
    Pittsburgh PA
    Posts
    57
    I usually leave something open or loosen up the valve stem so you dont get the pin holes on your last joints, Also you have to leave the regulator set at 50psi or less, Ive been told it can mess up the flow meter and i agree with Cosmicmuffin on as little pressure as possible, thats all you need. I love not burning through the nitrogen anymore

  6. #6
    Join Date
    Nov 2007
    Location
    Texas
    Posts
    425
    Thanks for the replies. I am oredering the set up that Timebuilder linked to.

  7. #7
    Join Date
    Oct 2011
    Location
    Arkansas
    Posts
    835
    Quote Originally Posted by hidalgo1301 View Post
    Thanks for the replies. I am oredering the set up that Timebuilder linked to.
    I would buy a better quality regulator. I had a Uniweld nitrogen regulator, it was a total piece of junk.

  8. #8
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,932
    Quote Originally Posted by AC5096 View Post
    I would buy a better quality regulator. I had a Uniweld nitrogen regulator, it was a total piece of junk.
    My Uniweld Nitrogen regulator has served me well.

    You do have to be sure to observe the 50 psi max inlet pressure, or they will start to leak.
    Instead of learning the tricks of the trade, learn the trade.

  9. #9
    Join Date
    Oct 2011
    Location
    Arkansas
    Posts
    835
    Quote Originally Posted by rundawg View Post
    My Uniweld Nitrogen regulator has served me well.

    You do have to be sure to observe the 50 psi max inlet pressure, or they will start to leak.

    Are you referring to the flowmeter? I have no experience with the Uniweld flowmeter, just the RHP 400.

  10. #10
    Join Date
    Jul 2007
    Location
    Virginia
    Posts
    5,932
    Quote Originally Posted by AC5096 View Post
    Are you referring to the flowmeter? I have no experience with the Uniweld flowmeter, just the RHP 400.
    Yes, I should have been more clear on that.
    Instead of learning the tricks of the trade, learn the trade.

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