Complete Leak Check, CO2 pressurized system - Page 3 - The Planted Tank Forum
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post #31 of 212 (permalink) Old 08-23-2012, 02:27 PM
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I had not seen this topic but it brings up some questions that I had not thought about. I'm new to CO so the answer may be obvious to others.
Looking at the pictures, the leak at three does just look like the threads are not sealed well but I question the pressure relief valve. This just looks like a fitting with a plug in the end. Is it in fact a relief valve that works in some way I don't see?
Any info?
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post #32 of 212 (permalink) Old 11-30-2012, 10:26 PM
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Hi,

I'm at the step 2 currently. In the morning I had low pressure set to approximattely 98-99 psi. 10 hours later it dropped to around 92 psi.

Is this OK or bad?
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post #33 of 212 (permalink) Old 12-01-2012, 03:24 AM
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A 6-7 drop in psi usually just means you have a leak in the low pressure side somewhere. Check the gauges and any ports that could leak.
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post #34 of 212 (permalink) Old 01-20-2013, 02:33 PM
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I am a little confused with the end of step 2. Instructions state
"G. Wait for 6 hours, if the new psi reading is within 1/8+ difference of original reading, go to step 3 If the psi lower a lot after 6 hours..."

I completed step 2 and after 12 hours my low pressure gauge dropped 3/4 to 1 psi (is this considered a lot)? Also the temperature got colder by 20 and ambient air temperature has been near 40 during test . Is this acceptable or is there a leak? Thanks
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post #35 of 212 (permalink) Old 01-20-2013, 08:05 PM Thread Starter
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Quote:
Originally Posted by chevy6960 View Post
I am a little confused with the end of step 2. Instructions state
"G. Wait for 6 hours, if the new psi reading is within 1/8+ difference of original reading, go to step 3 If the psi lower a lot after 6 hours..."

I completed step 2 and after 12 hours my low pressure gauge dropped 3/4 to 1 psi (is this considered a lot)? Also the temperature got colder by 20 and ambient air temperature has been near 40 during test . Is this acceptable or is there a leak? Thanks
Original:
G. Wait for 6 hours, if the new psi reading is within 1/8+ difference of original reading, go to step 3


Correction:
G. Wait for 6 hours, if the change of new psi reading is within 1/8+ difference of original reading, go to step 3
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post #36 of 212 (permalink) Old 01-20-2013, 10:58 PM
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Quote:
Originally Posted by chevy6960 View Post
I am a little confused with the end of step 2. Instructions state
"G. Wait for 6 hours, if the new psi reading is within 1/8+ difference of original reading, go to step 3 If the psi lower a lot after 6 hours..."

I completed step 2 and after 12 hours my low pressure gauge dropped 3/4 to 1 psi (is this considered a lot)? Also the temperature got colder by 20 and ambient air temperature has been near 40 during test . Is this acceptable or is there a leak? Thanks
As Bettatail mentioned, it is the change in pressure that you are looking at (i.e. the pressure should not drop more than 12.5% of the original value. If your PSI was set at 30 PSI for example, you would not want it to drop to lower than ~26 PSI).

If your low pressure gauge dropped 75%, then you have a significant leak somewhere (or there may be something wrong with the second stage regulation if you are using a dual stage regulator).

Are you sure your working pressure dropped to 1 PSI? If so, it indicates a leak (or you are working with extremely low working pressures...why?)

You should ideally be testing your CO2 system in a stable temperature environment; having the temperature fluctuate 20 degrees (Celsius? Fahrenheit? I assume Fahrenheit...) and then having it operating at 40 (again...Celsius? Fahrenheit? Again, I assume Fahrenheit) is too large of a change to accurately determine whether the changes in pressure are due to a leak or just temperature fluctuations.

I would set the working pressure to ~30 PSI, set the CO2 setup indoors where the temperature is more stable, and then see if it changes over the course of 6 hours.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
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post #37 of 212 (permalink) Old 01-21-2013, 01:11 AM
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Sorry i did not give enough detail. What i meant to say was my low pressure gauge dropped from 15 psi to 14.25 psi in 12 hours. Is this acceptable?
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post #38 of 212 (permalink) Old 01-21-2013, 08:53 AM
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Sorry i did not give enough detail. What i meant to say was my low pressure gauge dropped from 15 psi to 14.25 psi in 12 hours. Is this acceptable?
That is fine.

You only lost 14.25/15 = 0.95%, so a negligible amount.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
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post #39 of 212 (permalink) Old 02-20-2013, 05:57 PM
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Thanks for another helpful thread.

Any way to do step 1 with a paintball canister (since there is no shut off valve)?
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post #40 of 212 (permalink) Old 02-21-2013, 02:17 AM
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Thanks for another helpful thread.

Any way to do step 1 with a paintball canister (since there is no shut off valve)?
Without an ASA shutoff valve, it will be impossible.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
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post #41 of 212 (permalink) Old 02-22-2013, 04:51 AM
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Ok, then anyone live around englewood nj that can help me test my victor? X(
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post #42 of 212 (permalink) Old 03-02-2013, 01:07 AM
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Complete Leak Check, CO2 pressurized system

Hello,

I started testing a victor 453d regulator yesterday night. Please see the pics and let me know if it passed the test. Please excuse the date as I, for some reason, typed them in incorrectly. The first pics was taken yesterday whereas the other three today. Thanks!



~Cris
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post #43 of 212 (permalink) Old 03-02-2013, 01:42 AM Thread Starter
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Quote:
Originally Posted by Mathman View Post
Hello,

I started testing a victor 453d regulator yesterday night. Please see the pics and let me know if it passed the test. Please excuse the date as I, for some reason, typed them in incorrectly. The first pics was taken yesterday whereas the other three today. Thanks!



~Cris
slow leak on the LP side, and it took 10 hours to drop 20 psi, the actual leak rate is less than 0.1 bubble/second.
Normally such slow leak the soapy water test doesn't work, because you can't see the foams, the co2 sip through the soapy water not fast enough to push out visible tiny bubbles.
take out the LP gauge and the relief valve, make better seal on the threads and put them back on the regulator, then test the LP side again.
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post #44 of 212 (permalink) Old 03-02-2013, 01:48 AM
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Complete Leak Check, CO2 pressurized system

So just remove the LP and relief valve and redo the Teflon? Is it possible that the leak is also from the post body?



I have a 1/4"-1/8" bushing....1/8" nipple...to the solenoid which is closed.

My LP gauge read close to 80psi (look at the previous post) and dropped to (40 psi). What is an acceptable drop? From 80psi-?
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post #45 of 212 (permalink) Old 03-02-2013, 01:50 AM
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Quote:
Originally Posted by Mathman View Post
Hello,

I started testing a victor 453d regulator yesterday night. Please see the pics and let me know if it passed the test. Please excuse the date as I, for some reason, typed them in incorrectly. The first pics was taken yesterday whereas the other three today. Thanks!

~Cris
Just curious - have you tried testing with soapy water yet?
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