Nitrogen questions

[CDbrews]

So I have debated over getting a nitrogen setup for a while and have tried to figure out how to do it the cheapest.

I have a two faucet kegerator and would like to have one tap dedicated to a stout faucet. Im also trying to defeat having two tanks in the kegerator. So if i prime my non stout keg with the same to the desired carb level instead of with some less priming sugar as I have been doing with my co2 set up, can i then push that beer with the nitrogen? This seems like it would work and as long as i have a dual regulator so I can have the presure higher for the stout faucet.

If this works is it worth doing since there is less nitrogen in the same size tank as Co2? and also Im assumung more expensive and more fequent fills. But if i can find somewhere that will fill my Co2 tank with nitrogen it would be much cheaper than a whole nitrogen set up.

Let me know what your input is please!

 

[david_42]

First, you won't be using pure nitrogen, you need beer gas, which is a CO2/N2 mix.
Second, there's no way around having two tanks.
Third, the partial pressure of CO2 for beer gas would not keep your other beer carbonated. If you cranked the pressure down to 12 psi with a 25/75 mix, the partial pressure of CO2 would be 3 psi and eventually your beer would go flat.
Beer gas works for stout, because at 40 psi, you still have ~10 psi of CO2 for carbonation.

 

[CDbrews]

but if i balance that out with a long beer line on my non stout beer i would be able to keep the ten psi in the keg, hence keeping my beer carbed. Does this sound right?

 

[bendavanza]

You could use a really really long beer line but that's not ideal. It's a workaround some bars us that have to have really long trunk lines from the faucets to a walk in somewhere else. Beergas is 70% Nitrogen 30% co2 or 75%/25% depending on who's mixing it. So you would need to use a much higher pressure than straight co2 to keep a beer carbed. Beergas is harder to find than straight co2.
Do some reading here:
http://www.micromatic.com/draft-keg-beer-edu/dispensing-beer-blended-gases-cid-1793.html
AND
http://www.micromatic.com/draft-keg-beer/guinness-kegerator-conversion-kit-cid-2694.html