CO2 getting released from pressure relief valve - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 09-08-2017, 03:19 AM Thread Starter
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CO2 getting released from pressure relief valve

I have recently purchased a filled CO2 from a local place where I live. I was lent a regulator in the mean time till I get my aquatek premium co2 regulator so I'm not sure of the brand. When I open the CO2 tank if I even open it the slightest and the pressure goes past 0-5 it gets released from the pressure relief valve. I'm fairly new to pressurized CO2 so i'm not exactly sure what to look for or what to do. The CO2 tank is 10lbs. The left gauge is the one I can make go over 5
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post #2 of 10 (permalink) Old 09-08-2017, 02:18 PM
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Hi apisto guy,

Welcome to TPT!

The regulator is bad, depending upon the type of pressure relief on the regulator it should not vent unless the tank pressure is 1600 - 4500 psi. Guess that is why the regulator was a 'loaner'......take it back and ask for another loaner or wait until your new one arrives.

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post #3 of 10 (permalink) Old 09-08-2017, 07:44 PM Thread Starter
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There is no possible way to fix it or use it? He had 2 loaners we tried both they both did the same thing. I thought maybe it had to do with the solenoid at one point.
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post #4 of 10 (permalink) Old 09-08-2017, 07:56 PM
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You can try to fix it but only if you feel comfortable doing so. The pressure relief valve is just a spring that pushes on a diaphragm. When the pressure inside the chamber produces a force greater than the force the spring the diaphragm opens releasing the pressure until pressure inside the chamber lowers.

Assuming the spring is still good, you just need to tighten the adjustment on it so that the spring is more compressed. Almost all relief valves are adjustable, and although they come in many different shapes and sizes most all work on the same design principle. If the spring is bad (which is rarely the case) then you just need to purchase a new relief valve of the proper pressure gate.

Note: The relief valve is a safety feature and tightening it too much so that it would never open can compromise the safety of your setup if the pressure for some reason ever became too great.

I'm reading this correctly right? You said the left gauge CAN go over 5 just fine? Its when you adjust the right gauge you have the problem, correct?
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post #5 of 10 (permalink) Old 09-08-2017, 08:35 PM Thread Starter
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Sorry that was a mistype I can't get the left gauge past 5 it just releases I'm not sure it even reaches 5. I'm not that technically inclined to fix it most likely.
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post #6 of 10 (permalink) Old 09-08-2017, 08:38 PM
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Quote:
Originally Posted by apisto guy View Post
Sorry that was a mistype I can't get the left gauge past 5 it just releases I'm not sure it even reaches 5. I'm not that technically inclined to fix it most likely.
Are you 100% sure its coming from the pressure relief valve? The pressure relief is usually for when the working pressure (the right gauge) gets too high. I find it highly unlikely that two independent regulators have the exact same problem.

You are sure when you turn on the gas the regulator knob is backed all the way out (turned to the left)?

Secondly you are 100% sure the air is coming from the relief valve and not around the threads where the regulator connects to the tank? Are you using teflon tape? Sometimes it can feel like its coming from one place but it is actually coming from another.
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post #7 of 10 (permalink) Old 09-08-2017, 09:57 PM Thread Starter
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I can show you the exact place it is coming from. It's coming from the left guage well near the left guage. That little screw hole is where it all comes out whenever I open the CO2 tank. @Highseq
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post #8 of 10 (permalink) Old 09-08-2017, 11:20 PM Thread Starter
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Quote:
Originally Posted by Highseq View Post
Quote:
Originally Posted by apisto guy View Post
Sorry that was a mistype I can't get the left gauge past 5 it just releases I'm not sure it even reaches 5. I'm not that technically inclined to fix it most likely.
Are you 100% sure its coming from the pressure relief valve? The pressure relief is usually for when the working pressure (the right gauge) gets too high. I find it highly unlikely that two independent regulators have the exact same problem.

You are sure when you turn on the gas the regulator knob is backed all the way out (turned to the left)?

Secondly you are 100% sure the air is coming from the relief valve and not around the threads where the regulator connects to the tank? Are you using teflon tape? Sometimes it can feel like its coming from one place but it is actually coming from another.
Not sure if that's the pressure release valve or something else
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post #9 of 10 (permalink) Old 09-08-2017, 11:24 PM
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You have a model number for that regulator? It should be on a sticker somewhere on it or possibly engraved. Or maybe even just a brand.
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post #10 of 10 (permalink) Old 09-09-2017, 12:50 AM Thread Starter
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Quote:
Originally Posted by Highseq View Post
You have a model number for that regulator? It should be on a sticker somewhere on it or possibly engraved. Or maybe even just a brand.
Let me see if I can find it somewhere

Quote:
Originally Posted by Highseq View Post
You have a model number for that regulator? It should be on a sticker somewhere on it or possibly engraved. Or maybe even just a brand.
This is all that I can find
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Last edited by Darkblade48; 09-09-2017 at 05:01 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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