Nitrogen Pressure Chart?

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  • 11-13-2012
    Guerdonian
    Nitrogen Pressure Chart?
    Anyone got a partial pressure chart for Nitrogen and Temp?

    I want to do a nitro stout this winter, and want to get a nitro setup, but I am having trouble finding the good ol fashoned graph for nitrogen like there is for CO2. Talking actual "nitrogenation" not "beer gas". Any other info on the subject would be welcome.
  • 11-15-2012
    JFryauff
    Carbing with CO2, then dispensing with Nitro?
  • 11-15-2012
    NateHawk
    Quote:

    Originally Posted by JFryauff View Post
    Carbing with CO2, then dispensing with Nitro?

    I had a stout done that way last week. very nice. texture of the head was perfect.
  • 11-16-2012
    jtmartino
    Quote:

    Originally Posted by JFryauff View Post
    Carbing with CO2, then dispensing with Nitro?

    This is the way you have to do it - Nitro doesn't dissolve in the beer the same way CO2 does. I believe at minimum you need 25% CO2 if you wanted to try and do it, but I can't find any pressure charts other than the solubility of nitrogen gas in water.
  • 11-16-2012
    JFryauff
    Quote:

    Originally Posted by jtmartino View Post
    This is the way you have to do it - Nitro doesn't dissolve in the beer the same way CO2 does. I believe at minimum you need 25% CO2 if you wanted to try and do it, but I can't find any pressure charts other than the solubility of nitrogen gas in water.

    Correct, you'd carb normally to about 2.1-2.5 CO2/Volume, then dispense on upwards of 25-30psi of nitro through a stout faucet.
  • 11-16-2012
    Guerdonian
    Is this what is done with nitro pub beers like Guinness and Bodingtons? I really want that extra creamy head. Seems like local nitro beers vs. beers like Guinness tend to have different heads and foam, though they are both nitro. The local beers tend to be "on nitro" as in served with it, where Guenness is carbonated with nitro? Thoughts?
  • 11-16-2012
    JFryauff
    Quote:

    Originally Posted by Guerdonian View Post
    Is this what is done with nitro pub beers like Guinness and Bodingtons? I really want that extra creamy head. Seems like local nitro beers vs. beers like Guinness tend to have different heads and foam, though they are both nitro. The local beers tend to be "on nitro" as in served with it, where Guenness is carbonated with nitro? Thoughts?

    Yes, usually through a pre-mixed "beergas" or on-site blending of CO2 and N2O.
    Chances are, the local beers you prefer the head/mouth-feel of are being served at the proper temperatures, where most macro taps are served too cold. Serving pressures may differ as well.
  • 11-16-2012
    JFryauff
    Plus...Guinness kegs are shipped with N2O already dissolved in them, so if they are not diffusing the gas into the other nitro served beer, to equilibrate the beer with the mixed gas if may change the pour. For better or worse, I cannot say. Some places will simply begin serving the carbonated beer with a mixed gas, because proper absorption takes some time.
  • 11-19-2012
    GeePhroh
    This is a pretty good reference from Micromatic. They claim 38psi for Guiness, FWIW.

    The local welding supply house where I get my kegerator CO2 sells a standard "beer-gas" 75/25 CO2/N20 mix as well. Haven't tried putting on a nitro beer at home yet 'cause of the additional equipment (i.e., taps).