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Old 05-14-2009, 11:54 PM   #1
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Default CO2 regulator pressure climbing..??

I have a dual outlet CO2 regulator, and when I hook up two kegs to it and try to set the pressure to about 5 psi, it climbs up toward 10psi over night...

This is the regulator I have, 0 - 60 PSI CO2 regulator with Y and 2 - 1/4 Flare (threaded) fittings with ball valve shutoffs: www.kegkits.com

I have Rootbeer on one outlet and an American Pale Ale on the other. When I first go to the tap after a day, the pressure is near 10psi. It's set to around 5. I use the pressure relief valve on the corny, then dispense when it reaches around 5psi. The pressure doesn't increase afterwards (the rest of the evening) I come back the next day, and the pressure is back up to 10psi..

I can't figure out why it's doing this. The temp in the fridge isn't fluxuating, all my fittings are tight, regulator seems solid. There is also a check valve per outlet in the regulator, so there shouldn't be anything pushing back into the regulator...

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Old 05-16-2009, 01:39 AM   #2
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When you keep the CO2 tank in the fridge the elastomer that is used for the regulator's diaphragm will be slower to respond to changes in output pressure when it's cold.

For example. If you have the regulator in the fridge and set to 10 psi and then you change the output pressure to 12psi, you may find that when you come back in a couple of hours that the new output pressure may be 15 psi. This "creeping" effect is due to the cold temps effecting the diaphragm. I've learned to compensate for the "creeping" effect by setting the new output pressure just slightly lower than my intended pressure. It will then creep up to my new setting after some time. Usually not very long.

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Old 05-21-2009, 08:59 PM   #3
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Aaahh... that makes sense.


Thanks!

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Old 02-02-2010, 01:12 PM   #4
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Hmmm I just posted on something simular to this...lol... I am having the same problem and yes my Co2 tank is inside the fridge also.. maybe I should try to do the same only mine is creaping up much higher than just 3-5psi...its going from like 8psi to 20 and 10 psi to 20;...

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Old 02-02-2010, 03:37 PM   #5
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Hmm I have this on one regulator and my tank/regulators are external. I set the pressure on the fall rather than the rise. Once set at 10, it usually doesn't change.

I probably should swap the pressures between them.... one for soda/force carb and the other for beer...

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Old 02-02-2010, 03:59 PM   #6
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I've noticed similar issues on my dual regulator. If I set at 10psi it will usually creep up to 12psi over night and normally stay there. I'm serving at that pressure, so that works okay for me. If I don't keep a keg hooked up to each regulator the one that isn't hooked up will creep up from zero and seems to just keep going higher over time. So, I just keep one of my three kegs on the second regulator.

If the creeping doesn't stop and even out and the thing just keeps creeping higher and higher you could have a defective regulator.

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Old 02-02-2010, 04:11 PM   #7
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Quote:
Originally Posted by Shooter View Post
If the creeping doesn't stop and even out and the thing just keeps creeping higher and higher you could have a defective regulator.
Just wanted to add - continuous pressure creep can also occur if the regulator diaphragm freezes (or partially freezes). That's happened to me before.
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Old 02-02-2010, 04:15 PM   #8
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Quote:
Originally Posted by lamarguy View Post
Just wanted to add - continuous pressure creep can also occur if the regulator diaphragm freezes (or partially freezes). That's happened to me before.
Good reason to keep the co2 out of the fridge/freezer.
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Old 02-02-2010, 04:34 PM   #9
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Good reason to keep the co2 out of the fridge/freezer.
For me, it's still better to keep the CO2 tank in the fridge for (1) space reasons and (2) avoid CO2 tank temperature fluctuations (e.g., kegerator in my garage).
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Old 02-02-2010, 05:16 PM   #10
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Quote:
Originally Posted by lamarguy View Post
Just wanted to add - continuous pressure creep can also occur if the regulator diaphragm freezes (or partially freezes). That's happened to me before.

YIKES! Well, I keep my temp control at 40 degrees. So, I'm hoping there aren't any pockets that are cold enough to freeze the thing.
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