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Thread: Poly or vinyl?

  1. 03-22-2009 02:25 PM #1
    brewman21
    brewman21 is offline Junior Member
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    Question Poly or vinyl?

    I'm installing a 8 tap, pass-thru air shaft tower.my lift is 12 ft. from keg bottoms to tower faucets=6 psi. Elev. 500 ft.= .5 psi., 5 ft. 3/8 vinyl jumpers
    from keg to wall brackets=1 psi. So as I see it I should need aobut another
    6 to 7 psi. thru line restriction. That is with running beer at 38 F constant and
    14-15 psi. head pressure of course. My question is should I run 15 ft 5/16
    poly=1.5 psi, and 2.5 ft 3/16 vinyl choker at tower=5.5 psi. total = 7 psi.
    Or should I run just 17.5 ft 5/16 vinyl the whole way, from wall brackets to faucet tail pieces= 7 psi. ?? One more question? I'm running dual air shafts with 4" Alum. flex. Should both shafts be the same Dia. or could or should I run the return air a smaller diameter, say 3' or 2.5 " to save a few$$$$ Any
    advice would be appreciated. CHEERS!!!!!!!
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  2. 03-22-2009 05:30 PM #2
    Scott Zuhse
    Scott Zuhse is offline Administrator
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    Default

    Hopefully you realize that the money your are attempting to save will be overcome rapidly with the waste associated with the air cooled system and the use of the 100% CO2. This is old school. Most installers we work with refuse to install these systems because they do not want to be accountable for the waste associated with this type system.

    Invest in a glycol system and push the beer with a gas blender. This will be the best decision you will ever make that effects your return on investment.

    If you are dead set on the air cooled system, at least use a gas blender and dispense at around 22 PSIG for your ales and lagers and 32-35 for the nitrogenated beers. Do not attempt to go with straight CO2.

    Install 4.5' of 3/16" attached to 13' of 1/4" barrier. 22 PSIG of 60%CO2 / 40%nitrogen and your are good to go.
    Scott Zuhse, Instructor Micro Matic Dispense Institute
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  3. 03-22-2009 06:12 PM #3
    brewman21
    brewman21 is offline Junior Member
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    Default what gives?

    Iv,e been running a similar set-up at our brewpub, and another bar in town with a slightly longer run, with 1/4 vinyl that has .85 psi./ft. What doesn`t
    make sense to me is that its run length is 22 ft., with 14 ft. lift. That equals
    out to 25.7 psi drop. I`m still pushing 100% co2 at 15psi. at 38 F with good
    flow rate of 1 Gal./minute. My foam loss is 5% at max. What gives?
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