Anyone have experience with a natural gas regulator and co2?

[commonlaw]

I'm trying to use a natural gas regulator to put a blanket of co2 over a corny I plan to serve via a hand pump. From what I can tell the regulator should cut the gas flow down to 1/2 psi. However, when I hooked everything up and opened up the line, there was quite a bit of pressure flowing out of the regulator (the co2 tank was at 30psi force carbing another keg--the co2 goes into a 3 way manifold. From the manifold I connected one barb to the gas regulator. Another was going to the force-carbed corny). This was definitely not anywhere close to 1/2 psi.

Here's the regulator.

Anyone have a thought about what I'm doing wrong? do I need to do something with the regulator to get it to work? Will it not work with co2 for some reason? Am I misunderstanding something? Many thanks.

 

[jspence1]

The tank pressure of a propane tank is about 80 psi the tank pressure of your co2 tank is about 400 psi. I'd expect a lot more gas to pass though it with the increased pressure

 

[commonlaw]

The tank pressure of a propane tank is about 80 psi the tank pressure of your co2 tank is about 400 psi. I'd expect a lot more gas to pass though it with the increased pressure

well, it was receiving 30psi (there was already a regulator on the co2 tank serving up 30psi), but I see your point. Maybe natural gas has a very low starting PSI, and therefore does less to knock down the psi even more? Maybe a propane regulator will actually be a better solution, if that is the problem.