As I mentioned previously, I have two acetylene tanks, 145 CF and 397
CF.
So I bought some O/A kit that includes a regulator, among other
things.
Here's something that concerns me: the 397 CF tank, seems to leak
acetylene from the seal between regulator and tank. The symptom of it
is that the high pressure gauge shows pressure that declines
relatively rapidly if I close the tank valve. I would say most
pressure is lost in one minute. This makes me concerned since
acetylene is explosive.
Here's my findings:
1) Quick pressure loss with tank valve opened and then closed, happens
on the 297 CF tank
2) it does not happen with the 145 CF tank, or at least it is
extremely slow
3) The rate of loss on 397 CF tank seems to depend from how tightly I
tighten the connecting nut. The tighter, the slower is the leak. I am
not sure how hard I can push that brass nut, but my guess is not too
hard. I used perhaps 50 Ft/lbs or so of force.
Any thinking on this. Thanks.
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