Results 1 to 16 of 16

Thread: Practicing Brazing on 1/4" appliance unit...w/o Nitrogen

  1. #1
    Join Date
    Apr 2021
    Posts
    12
    Post Likes

    Practicing Brazing on 1/4" appliance unit...w/o Nitrogen

    Will I blow myself up practicing my brazing on a small window unit or dehumidifier with our using inert gas after evacuating?

    I em-place a piercing valve then vacuum down the R410 into my recovery tank. I then braze a few joints and recharge system with same 410 and look at my joints for leaks.

    I don't have nitrogen...should I be worried?

    JC

  2. #2
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    You won't blow your self up you will just cause oxide flakes that may clog the capillary tubes.

    Sent from the Okie state usin Tapatalk

  3. Likes zymometer liked this post.
  4. #3
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    Just don't try it on a system with flammable refrigerant.

    Sent from the Okie state usin Tapatalk

  5. Likes heatingman, dieseldude, BNME8EZ liked this post.
  6. #4
    Join Date
    Mar 2016
    Location
    Dayton Oh
    Posts
    3,557
    Post Likes
    Quote Originally Posted by R600a View Post
    Just don't try it on a system with flammable refrigerant.

    Sent from the Okie state usin Tapatalk
    Your not living life on the edge unless you braze a system still filled with 290


    Sent from my iPhone using Tapatalk

  7. Likes R600a liked this post.
  8. #5
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    Quote Originally Posted by jbhenergy View Post
    Your not living life on the edge unless you braze a system still filled with 290


    Sent from my iPhone using Tapatalk
    I have always wanted to shoot a 1lb tank of propane with a high power rifle next to a fire.

    Sent from the Okie state usin Tapatalk

  9. #6
    Join Date
    Mar 2016
    Location
    Dayton Oh
    Posts
    3,557
    Post Likes
    Quote Originally Posted by R600a View Post
    I have always wanted to shoot a 1lb tank of propane with a high power rifle next to a fire.

    Sent from the Okie state usin Tapatalk
    What’s holding you back?

    When I was 11 and we were building dads house, he had the gas powered nail guns. Pasload I think they were. Pretty new for the time. Had a little propane tank and a battery. Anyhow we always had a fire going to burn all the scraps. I thought it would be a fun game to play to throw the old gas containers in the fire.

    I thought it was great waiting for them to explode but I can’t say dad shared the same enthusiasm.


    Sent from my iPhone using Tapatalk

  10. Likes R600a liked this post.
  11. #7
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    Quote Originally Posted by jbhenergy View Post
    What’s holding you back?

    When I was 11 and we were building dads house, he had the gas powered nail guns. Pasload I think they were. Pretty new for the time. Had a little propane tank and a battery. Anyhow we always had a fire going to burn all the scraps. I thought it would be a fun game to play to throw the old gas containers in the fire.

    I thought it was great waiting for them to explode but I can’t say dad shared the same enthusiasm.


    Sent from my iPhone using Tapatalk
    I don't have anywhere to do that kind of thing.

    Sent from the Okie state usin Tapatalk

  12. #8
    Join Date
    Apr 2021
    Posts
    12
    Post Likes
    Thread Starter
    I like the idea of going to the shootinng range...

    As a follow up...I have an empty nitrogen bottle and regulator. Can I replace the PSI regulator that has a range of 0-400psi with a guage that has a range of 0-30psi?

    How do I keep low flow at 1 psi without getting a low flow valve? I read where one could turn on the nitrogen very low and test the flow using their hand...

    What are a few rules of thumb for nitrogen?

    Joe

  13. #9
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    Quote Originally Posted by alamosixx View Post
    I like the idea of going to the shootinng range...

    As a follow up...I have an empty nitrogen bottle and regulator. Can I replace the PSI regulator that has a range of 0-400psi with a guage that has a range of 0-30psi?

    How do I keep low flow at 1 psi without getting a low flow valve? I read where one could turn on the nitrogen very low and test the flow using their hand...

    What are a few rules of thumb for nitrogen?

    Joe
    I use this.
    https://m.ferguson.com/product/goss-...0f/_/R-4861517

    Just set the pressure to 25 or 50 and turn the flow up until it hits the first or second line. I think my local United had a better price than that but I got it a year ago.
    Oh yeah and I don't recommend putting that lower pressure gauge on a nitrogen regulator. I think mine is 0 to 800 psi because my regulator can push 600 plus psi.
    Sent from the Okie state usin Tapatalk

  14. #10
    Join Date
    Mar 2016
    Location
    Dayton Oh
    Posts
    3,557
    Post Likes
    They now make a 3n1 reg. Has a braze setting a purge setting and a test setting. Counter guys at j stone talked me into it last year. Like 125 but I will admit it is much nicer than my old one that they give everyone in school.

    Best part about it is don’t need a wrench to put it on and off.

    This is it. Clearly like everything else the price has skyrocketed over the last 12 months.

    https://www.trutechtools.com/victor-...4aAu8uEALw_wcB


    Sent from my iPhone using Tapatalk

  15. #11
    Join Date
    Sep 2014
    Location
    central IL
    Posts
    115
    Post Likes
    I have a Medical oxygen reg. that will hook to my tank was free? But i changed the fitting to hook to my high pressure reg. so it is tool free now. Works good you might find one around some where?

  16. Likes R600a liked this post.
  17. #12
    Join Date
    Jul 2010
    Location
    napping on the couch
    Posts
    15,604
    Post Likes
    Quote Originally Posted by jbhenergy View Post
    They now make a 3n1 reg. Has a braze setting a purge setting and a test setting. Counter guys at j stone talked me into it last year. Like 125 but I will admit it is much nicer than my old one that they give everyone in school.

    Best part about it is don’t need a wrench to put it on and off.

    This is it. Clearly like everything else the price has skyrocketed over the last 12 months.

    https://www.trutechtools.com/victor-...4aAu8uEALw_wcB


    Sent from my iPhone using Tapatalk
    I just picked up that bad boy a couple weeks ago. Used it two times to braze/pressure check. I like it.

  18. #13
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    9,011
    Post Likes
    Quote Originally Posted by R600a View Post
    I have always wanted to shoot a 1lb tank of propane with a high power rifle next to a fire.
    I have it on video

    I used a little propane bottle , like from a torch , set in next to a lit flare , shot the bottle with my 9mm , it just shoots out a Huge flame for about 3 seconds

  19. Likes R600a liked this post.
  20. #14
    Join Date
    Jul 2019
    Location
    Oklahoma home its in the name
    Posts
    7,748
    Post Likes
    Quote Originally Posted by Snapperhead View Post
    I have it on video

    I used a little propane bottle , like from a torch , set in next to a lit flare , shot the bottle with my 9mm , it just shoots out a Huge flame for about 3 seconds
    Would you care to share the video?

    Sent from the Okie state usin Tapatalk

  21. #15
    Join Date
    May 2021
    Location
    Minnesota
    Posts
    12
    Post Likes
    You can always practice brazing by swaging and than brazing and cutting the joint open to see if it flowed properly as well. Just holding pressure doesn't necessarily mean its a good joint. Good flow into the joint is more important than just "capping" off the joint.

  22. #16
    Join Date
    Feb 2004
    Location
    New Mexico
    Posts
    10,591
    Post Likes
    I've always heard of what happens if the valve on a nitro or oxy tank is broken off. How it
    will fly. Well two guys I know tried this by shooting the valve. Deserted place by a lake.
    Full tank of nitro.
    One shot and the tank flew just like the urban myth said. Even they were impressed.
    Give me a relay with big enough contacts, and I'll run the world!

    You can be anything you want......As long as you don't suck at it.

    If a person wants to create a machine that will be more likely to fail...Make it complicated.

    USAF 98 Bomb Wing 1960-66 SMW Lu49

  23. Likes R600a liked this post.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •