Can I disable the pressure relief valve in my pinlock keg lids? - Home Brew Forums

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Old 06-16-2010, 06:10 AM   #1
262andbrew
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Background (and all of my experience) I got 4 old hand me down Coke kegs that had no valves in the lids. Replaced a couple of o-rings on posts and one lid o-ring and everything was good. I had to ramp up pressure on one of them for the lid to seat, but really everything was pretty easy.

I just doubled the size of my flock, adding 4 more pinlocks, but these lids are different. I tested the pressure when they arrived and everything was good.

I gave 2 of them a good cleaning, and sterilized in preparation for kegging 2 new batches tonight. I put pressure to them fussed with the lid o-rings, but eventually got that figured out BUT, and this is my the reason for my question, the pressure relieve valves in the lids are leaking at any more than just a few pounds of pressure. That is going to be a problem.

I tried the Keg lube, no dice.
I removed and cleaned, no dice.
I swapped valves from lid to lid, no dice.

I grabbed another one and cleaned up one of my old ones so I got my brews kegged, but I need to figure out my new problem children.

So, what do I do now?
Can I disable the valves?
Do I just need to buy new springythings? (it looks like the are 12 bucks a piece...not going to break me, but kind of sucks)
Why did they work when they showed up and not work when wet? Can they not get wet?

Let me know what you would do next for these problem lids. I am spent, what I thought was going to be a 2 hour clean->transfer->cleanup night end up being 4 hours of frustration and wasted co2. Good thing I had a few on tap and I have a forgiving wife .

Peace.

 
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Old 06-16-2010, 07:51 AM   #2
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I don't have any coke kegs. If it was pepsi kegs (gotta be pretty similar) I would say new springy things at $12 each. Pepsi pressure reliefs work fine while wet.

In the mean time you have some really sharp five gallon SS fermenters you can put to work, just transferrign with CO2 is going to be an issue.
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Old 06-16-2010, 01:38 PM   #3
Jmac00
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sounds like someone swapped the lids as most coke kegs don't have the pressure relief in the lid, pepsi does. Good luck with getting it figured out. Oh, if you have an air compressor, i use mine after i made a fitting to pressure test my kegs...saves on CO2.

 
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Old 06-16-2010, 01:43 PM   #4
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You could always just have the opening welded shut.

Personally, as the reliefs fail I am doing this. Fewer places for failure means less maintenance and fewer spare parts.

Pressure relief can be obtain elsewhere in the system.

 
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Old 06-16-2010, 01:55 PM   #5
262andbrew
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Quote:
Originally Posted by Jmac00 View Post
sounds like someone swapped the lids as most coke kegs don't have the pressure relief in the lid, pepsi does. Good luck with getting it figured out. Oh, if you have an air compressor, i use mine after i made a fitting to pressure test my kegs...saves on CO2.
That is what I thought. I bet these babies have had long and interesting lives.

Good call on the compressor. It sits about 8 feet away from the Keezer. I will go ahead an make the connections.

 
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Old 06-16-2010, 02:10 PM   #6
262andbrew
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Quote:
Originally Posted by GilaMinumBeer View Post
You could always just have the opening welded shut.

Personally, as the reliefs fail I am doing this. Fewer places for failure means less maintenance and fewer spare parts.

Pressure relief can be obtain elsewhere in the system.
I like this solution. Do it once and be done.

 
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Old 06-23-2010, 05:31 AM   #7
262andbrew
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Ha...well I ordered in new pressure relief valves, got them today and went to put them in...and all 3 of the 'bad' valves are holding pressure now. I guess at 90 degrees and 95% humidity everything is sticky. I will hold off on using the new springs and see if they work the next time I am ready to keg a new batch.
If they fail at that point I will throw in the new ones. If they fail then I will do a bunch of cussing and go find a welder.
At any rate, at this point I guess the stars are in line and life is good.

 
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Old 06-23-2010, 01:32 PM   #8
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Sometimes, it help them seat better by giving them some lube.

You can go with the high dollar keg lube or just use petroleum jelly.

 
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Old 06-23-2010, 02:15 PM   #9
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Just my nitty opinion but it's not a good idea to remove/disable relief valves on pressure vessels. True that we homebrewers almost never get up to even half the relief pressure of 130 psig but it's still bad practice.

While you could install relief valves elsewhere in the system that's not really a good idea either...because it has to be connected to the system in order to have relief protection. The tank itself needs the relief valve.

I only have two Coke pin-locks and both have relief valves built into the lids...they just don't have the manual release lever/poppet. It's a different type of relief valve. No tank should be without a relief valve.

Just my opinion. 'No relief valve' works until it doesn't.
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Old 06-25-2010, 04:37 AM   #10
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You could always drill them out and replace them with these:


http://stores.kegconnection.com/Detail.bok?no=454
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