View Full Version : nitro purgin
cooltools
02-12-2009, 09:28 PM
All the manufactors ask us to nitro purge there pipe work but none give us any flow rates for doing this?? I was told as long as you can feel the nitro comeing out the end of the pipe with the back of your hand that ok.Now that seems a bit old hat doing it like that so does anyone have more info on this ???
taz24
02-12-2009, 09:42 PM
All the manufactors ask us to nitro purge there pipe work but none give us any flow rates for doing this?? I was told as long as you can feel the nitro comeing out the end of the pipe with the back of your hand that ok.Now that seems a bit old hat doing it like that so does anyone have more info on this ???
Uless you have a flow rate valve how would you
measure the flow anyway.
The acctual rate is 2 ltr a min but unless you can
measure it that is accademic.
So the best way is with a sensative piece of your
skin and make sure all the pipe ends are capped with
just a small vent hole to alow flow.
Cheers taz.
.
jpsmith1cm
02-12-2009, 09:56 PM
Taz gave as good of an explanation as I can, if not better.
I usually hold my hose to my cheek and feel for the slight flow. Then I hook it up to the piping.
lowcool
02-12-2009, 10:06 PM
doesnt hurt to have a vertical section at the end either as you know the pipe will fill regardless of your relief hole location
Nitrogen...
Nitro is an abbreviation for nitroglycrine... Won't get me going there, I promise.
taz24
03-12-2009, 04:45 PM
Nitrogen...
Nitro is an abbreviation for nitroglycrine... Won't get me going there, I promise.
Anybody purging with nitroglycrine will get every one going. Away!! Fast!!
:cool:
Cheers taz
.
Quality
03-12-2009, 04:51 PM
You can get those vertical flow meters with a floating bobbin with adjusting screw at the bottom , they are the same type that welders use for mig and tig welding ;)
cooltools
05-12-2009, 06:37 PM
so 2ltr a min it is then boc sell a flow meter will pick one up .thanks for that taz
US Iceman
05-12-2009, 10:55 PM
Another way is to punch a hole in the rubber or plastic plugs on the tubing. This will vent enough nitrogen through the tubing to keep it clean and you don't need another regulator.;)
Adi cool
06-12-2009, 10:47 AM
Just use an old service manifold. Use compound side or H.p if you like and set up using hose to pipe or component that your brazing. Set at 5 p.s.i.g ( will vary depending on pipe size) and make sure system is open e.g open service valves or remove pipe caps. Hope this helps
DEVIL
07-12-2009, 09:54 AM
not how i do it, but i red it in a refrigeration book that u ad the other end to a hose and the hose you add it in a bottle of water, and theoretically if u feel once the system with nitrogen, then you just need it to bobble in the water a little bit so you make shore no air is getting back in the system
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