Quote:
Originally Posted by AC_Hacker
I tried avoiding brazing to the BPHX also and wanted to use threaded connectors but the system it slowly leaked refrigerant and oil.
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Not trying to offend you or anything, but are you sure you sealed the threads properly? (Maybe there is a special way it needs to be done for such high pressure?) I thought threaded flare connections were pretty standard in A/C stuff? I even found access valves for sale with 1/8" NPT threads. (still can't post a link)
Quote:
Originally Posted by AC_Hacker
When you braze, you will need a purging gas, like dry nitrogen or argon, etc. I used propane, which worked just fine, but I would not ever recommend that anyone do anything as dangerous and foolish.
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This is one of the biggest reasons I don't want to braze. Eventually I'd like to braze a finished "contraption", but I would much prefer to thread my test system so that I can change parts easier. I also want to experiment with a thermal expansion valve, it might take more than one configuration before I'm happy.
I'd really be cranky if I spent $50+ on a heat exchanger, brazed it in, and then changed my mind about how I want this to work. (or ruined it in the process!)
I did read here about somebody's experience with compression fittings, and I can see why they might fail. I'm just not sure why threads would leak? I also wanted to store my R22 charge in a (new) paintball CO2 tank, which is threaded for 3/8" flare threads. How would I store the R22 if I can't seal the threads?