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Brazing with nitrogen
Hello all,
I have a newbie question. I will be working on a sealed ice-machine on which I need to braze schrader valves to high and low side.
I would like to use nitrogen to purge the line and I have a question about the process.
From all I have read, I need to insert the nitrogen through the schrader valve on the high side, right after the condenser and it will go out through the schrader valve at the low side. However it is also stated that this is also the order in which I should braze, the high side sharader valve first then the low side schrader valve.
My question is how would I braze the high side schrader and apply the nitrogen at the same time? Wouldn't I melt the nitrogen hose attached to it? Should I attach a long copper tubing to the high side schreader valve and the nitrogen hose to it, that way increasing the distance between the nitrogen hose and the area being brazed?
Thank you very much in advance.
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You can cut the line put one of this "adjustable stub ports?" That's what I did with small sealed systems.
And you really can't braze with nitrogen its not the least bit flammable: P
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Originally Posted by
Core_d
You can cut the line put one of this "adjustable stub ports?" That's what I did with small sealed systems.
And you really can't braze with nitrogen its not the least bit flammable: P
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What I meant was to braze while having nitrogen flowing through the tubing thus avoiding oxidation.
and what do you mean by "adjustable stub ports"? A piercing valve?
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I know what you meant just joshen ya
Its a little tool you can fit on the end of most any sized pipe and will more less seal to it. It also has a threaded valve to put a hose on perfect for flowing until you get valves installed. I dont the name as I don't own one but if you do a lot of sealed unit work I would invest in one. I've seen then for sale at appliance part shops. Someone will hopefully be along to fill you in a little better.
The inside part that seales around the pipe looks like the same type of technology that you see on those magic one size fits all infomercial wrenches....
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Originally Posted by
Core_d
I know what you meant just joshen ya
Its a little tool you can fit on the end of most any sized pipe and will more less seal to it. It also has a threaded valve to put a hose on perfect for flowing until you get valves installed. I dont the name as I don't own one but if you do a lot of sealed unit work I would invest in one. I've seen then for sale at appliance part shops. Someone will hopefully be along to fill you in a little better.
The inside part that seales around the pipe looks like the same type of technology that you see on those magic one size fits all infomercial wrenches....
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Ok, Thank you. I haven' t run into such a tool, but I will look for it.
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Originally Posted by
kamersoutdoor
That's great, thank you very much.
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yep that is it. sometimes use electric tape with mine.
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I do have that little guy and does fine. What I'm talking about though actually goes over the pipe and seals down on it.
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