Flowing Nitrogen While Brazing Is Not Extra Work

Flowing nitrogen while brazing is not extra work.
#betterhvac #hvac #hvactech #hvactechnician #airconditioning #minisplit #dehumidifier #humidity #homeperformance #heating #ventilation #airconditioning #bluecollar #tradesman #comfort #cooling
#heating #iaq #timdestasiohvac
#homeperformance #hvactraining #buildingscience #hvactraining #hvacdesign #ductdesign

[@coldfinger459sub0]

For newbies, one word of warning, specially, with cheap nitrogen regulators, even sometimes good ones
Diaphragms and spring adjusters were never meant to be accurate at such low flow rates, and during the middle of your abrasion, occasionally the diaphragm will move all by itself, and either cease the flow of nitrogen in the middle of your brace or it’ll open up a little bit more and a little bit of excessive pressure
Nitrogen pressure in the pipe because it cannot release fast enough to the valve core opening, pushing against your brazing, making a hole or a push through into silver liquid brazing rod with the excessive pressure
These large high-pressure nitrogen regulators were designed to work at greater pressures .
And that small little one extra step of adding the flow regulator is designed for my small pressures and flow rates that are precise and will not turn off or during the middle of your procedure
Just a cautionary note to pay attention to to see if your particular regulator is extremely sensitive that can change all by itself in the middle of your operation like turning off the nitrogen
One method you have an extremely low flow of nitrogen tap the back of your regulator diaphragm with your wrench or screwdriver and just a little bit .
And all of a sudden, your nitrogen pressure pop up giving you too much flow or completely shut off then you know you have a regulator that cannot be used for this particular situation .
Second note, very sensitive parts of your skin for testing extremely small flow of nitrogen is the skin on your upper lip below your nose coming out of your hose or the skin just under your eye around your face extremely small flows of air .
Of course you would not be trying to adjust airflow with your eye stuck towards the opening that could possibly jet out high-pressure and blind. You have to say that because I know common sense is not common anymore.

[@timdestasiohvac]

Good reminders- thank you. I just ordered an inline low flow from True Tech Tools. It has 3 settings- Purge, Braze and Off.