I just purchased a keezer build that has a three tap setup. The CO2 tank has both a primary regulator and a secondary regulator. So far I have been unable to get the CO2 flowing without the pressure relief valve on the primary regulator blowing almost continuously. At first I thought that I had the primary regulator set incorrectly, but I have turned the knob to adjust the pressure on the primary regulator down as low as it can go and although that has helped somewhat it still blows the relief valve fairly steadily. I will note that when adjusting the pressure knob I have only used my fingers to loosen it so it may be possible that I need to use a wrench to turn the pressure down more? Any suggestions/help is greatly appreciated. Thanks
If I'm reading this properly and we are talking about the same thing, you have two dials - one is the volume of gas in the tank, the other is the pressure you are distributing to the kegs. If everything is working properly, you open the tank valve all the way and then adjust your pressure with the knob by the gauges. The value you want is less than 15 pounds more than likely. What pressure is the gauge showing?
The gauge steadily rises until it hits the limit of 60 psi and then the pressure relief valve opens and it drops, but then the process repeats itself.
Which direction are you turning the pressure knob? You know that clockwise (in) is higher pressure and that counterclockwise (out) is lower pressure, right?
Here are pictures of the setup. https://drive.google.com/file/d/0B8ECp8DG7h_rVjAwTzAwb3V4NklaUEdZcG5vSk9RMkw2TFFn/edit?usp=sharing https://drive.google.com/file/d/0B8ECp8DG7h_rb3NNdGotalFtQjdlVWt0OXVMSi1LcnRXM1Jz/edit?usp=sharing
Never use a wrench to adjust the regulator. The big knobs are designed to be adjusted by hand. The primary regulator in the photo shows zero pressure, so it appears that the valve on the tank is closed. What happens when you open the valve with the regulator knob turned fully out? [sorry, that was a typo in my original reply] Does it steadily rise after you stop adjusting it? FYI, the pressure relief is typically 60 psi, so that's working correctly, as is the low pressure gauge. My money is on a bad regulator. There is no way for a pressure gauge to read the volume of gas in the tank. It shows only the pressure in the headspace. There is absolutely no correlation between pressure and volume. It can't even be inferred.
So let me guess...the pressure gauge slowly climbs to max pressure, then triggers the pressure relief valve? This is a typical symptom of membrane failure. Do you hear a 'hum' while the pressure builds?
No. In a CO2 cylinder, the gas volume changes (increases) as the liquid volume decreases. It's the pressure of the gas (which is in the headspace), not the volume, which stays fairly constant.
I think he was being facetious in that the volume of the tank doesn't change. What comprises the volume changes. Hence the wink.
Oh, I know he was being facetious. But since he was riffing off of a statement about "the volume of gas" (not "the volume of the tank"), I suspect he didn't know that the tank has more than gas in it. Thus, a teachable moment.
It seems counter-intuitive that, as you remove gas from the tank, the volume of gas in the tank increases while the pressure remains constant.
Fair enough, liquid vs gas.... volume of Co2 is the same... i guess that's what i get for trying to make fluid dynamics cracks on the internet.
