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Old 02-22-2013, 09:55 PM   #1
haeffnkr
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Default Can not find leak on Cornelius regulator

Hi,

My latest regulator is a used Cornelius model that goes into to 2 secondary regulators.
This Cornelius regulator will not hold pressure when I turn off the tank valve and I assume it is at the tank connection ...maybe....
I want to try and stop it from leaking and bleeding down to zero pressure.

I have swapped different secondary gauge, re did all the teflon tape connections, put in a complete rebuild kit inside the regulator, tried a different tank connector, tried a rubber oring, nylon washer and fiber washer on the tank connection.

I have laid the regulator horizontal and flooded it with starsan including the safety pressure relief valve, while pressurized to find the leak, no dice.
I dont have a left hand thread primary guage to swap out.

I might try swapping out the secondary shut off.... but I think it is unlikely leaking...

I am out of options with this thing.
I assume it is the tank connection but can not stop it.
Any ideas?

thanks Kevin





thanks Kevin

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Old 02-22-2013, 10:25 PM   #2
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Originally Posted by haeffnkr View Post
This Cornelius regulator will not hold pressure when I turn off the tank valve...
I'm having a hard time understanding what you mean. You turn off the tank, and the pressure on teh regulator gauges goes to zero, right? Of course it would without any pressure coming in. Does it have a check valve (allows pressure to go out but not in)? If it does, it's not going to read what pressure is in the keg or it's own lines, because that pressure can't re-enter the regulator in reverse.
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Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!
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Old 02-23-2013, 01:41 AM   #3
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I'm having a hard time understanding what you mean. You turn off the tank, and the pressure on teh regulator gauges goes to zero, right?
Yes, but it should not go to Zero if there are no leaks.

If you have no leaks, you can turn on the tank valve, pressurize the regulator and turn off the tank valve. (Assuming you have an working shut off on the secondary out put and/or a hose/fitting that does not leak on the secondary output.) The regulator should stay pressurized and not leak down.

I put on a different regulator that I have been working with also, it holds pressure with the tank off -
(note the tank is about empty and only has about 200 psi in it)

I put an old corny oring between the tank and the regulator in the photo above.





So on the Cornelius regulator it must be leaking on the shut off valve or the tank connection....unless there is something about this Cornelius model I am not aware of and it is leaking else where.
I dont have a shut off that will fit up into the Cornelius, the built in relief valve is in the way.

thoughts?

thanks Kevin
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Old 02-24-2013, 03:40 AM   #4
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I would guess it's the on off valve on the outlet that the gas line would go on. I would add a piece of gas line to the barb with a disconnect on the other end and leave that valve open. Then see if it goes down.

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Old 03-04-2013, 05:18 PM   #5
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I would guess it's the on off valve on the outlet that the gas line would go on. I would add a piece of gas line to the barb with a disconnect on the other end and leave that valve open. Then see if it goes down.
I put in a new oring on the tank connection and shut off valve on the regulator output.

It has held pressure for 3 days now on a newly filled tank !!
Got new shut off valves from RiteBrew.

Now I have to chase a leak between the primary regulator shut off and the secondaries.... ugh.

thanks Kevin

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Old 03-04-2013, 05:23 PM   #6
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Put soapy water on everything that has a connection and also on the seal on top of the corny keg. This will tell you where the leak is then proceed accordingly.

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Old 03-04-2013, 05:30 PM   #7
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I had a similar problem with a tank/regulator. Turned out it was at the valve on an old tank, not the regulator. Most times though, it's the fitting where the regulator attaches to the tank.

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Old 03-04-2013, 06:19 PM   #8
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Does that regulator have a relief valve? Surprised you're holding it at 60PSI...I believe mine blows above 40 or 50.

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Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!
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Old 03-05-2013, 01:07 AM   #9
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Quote:
Originally Posted by tre9er View Post
Does that regulator have a relief valve? Surprised you're holding it at 60PSI...I believe mine blows above 40 or 50.
Most of the Cornelius regs I have seen are meant for beer or soda, so they don't usually blow the relief unless over 100 psi.
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Old 03-05-2013, 11:57 AM   #10
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Just a heads up about Cornelius regulators. The connector to the co2 tank valve has a built in gasket that provides the seal. Click the LINK to see it in place.

This seal can be a serious PITA if it is compromised in any way. For me, and in my experience, the only reliable way is to replace the seal with the proper one that fits in the stem groove. There is a seal replacement KIT that can be easily used to solve the problem.

Hope this makes sense and helps.

P-J

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