"George Pontis" wrote in message
t...
In article , says...

"George Pontis" wrote in message
t...
In article , says...

For calibration, I just tried this experiment on an aquarium that has a
CO2 flow
rate of 2-3 bubbles per second. I left the CO2 flowing normally into
the
aquarium
with the cylinder valve closed. Over several minutes there was no
observable
change in the primary pressure. I think you would see a big drop in one
minute
with the leakage that you are experiencing.

George

The above suggestion was very helpful.

With the solenoid open and the valve closed, the gauges lost pressure
almost
immediately. The leak is happening where the bubble counter screws on to
the
needle valve. I can't tighten the BC any further, so I need another
solution. Will Loctite solve my problem or is there a better solution?


Glad to hear that you have reduced the problem to some leaks.

I am a little surprised that you would find a significant leak at the
bubble
counter, which is after the needle valve on my Milwaukee system. Anything
after
the needle valve, I would expect that it would be throttled back. Could it
possibly be between the regulator output and needle valve input ?

snip

Yeah, I was surprised too. I did not think I could lose that much gas in so
short a period of time on the low pressure side.

Once (24 hour cure) I put Loctite (Blue) on the threads between the bubble
counter and the needle valve the bubble count went off the scale, whereas I
was only getting about two or three BPS before. The guage also holds its
pressure now with the valve closed and the solenoid open.

Thanks.



George