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Old 04-29-2013, 06:39 PM   #1
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Default Keg to Keg Xfer with gas return

I have heard mention and even seen a picture of a keg to keg transfer where both kegs were under pressure, one was simply higher than the other and it caused a siphoning effect to move the beer. I have inferred this to mean that there is no pressure relief burping and would mean little to no foaming.

Can anyone expand on how this is done?

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Old 04-29-2013, 06:52 PM   #2
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You would ideally have a liquid to liquid hose, or switch posts on a liquid to gas.

You would have to vent pressure on the recieving keg (I think) unless you want your beer pressurized to 70 psi or so.

Either way, you make the pressure more on the sending keg. The pressure will try to equalize, so you would either have to vent the recieving keg or crank it pretty damned high on the sending keg. (your lines would fail at some point)

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Old 04-29-2013, 07:09 PM   #3
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Quote:
Originally Posted by jb1677 View Post
I have heard mention and even seen a picture of a keg to keg transfer where both kegs were under pressure, one was simply higher than the other and it caused a siphoning effect to move the beer. I have inferred this to mean that there is no pressure relief burping and would mean little to no foaming.

Can anyone expand on how this is done?
Do you get foaming? I've keg to keg transferred many times with zero foaming using the regular method of burping the receiving keg. You just need to make sure both kegs are cold and pressurized to the same psi.
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Old 04-29-2013, 07:11 PM   #4
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The description I read about and picture I saw had a liquid to liquid jumper AND a gas to gas jumper and then the sending keg was elevated above the receiving keg and apparently caused a siphoning of beer in a completely closed system (no burping pressure relief).

I could not find many other details but the idea intrigued me, though I don't completely understand it :-)

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Old 04-29-2013, 07:19 PM   #5
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If you have gas to gas and liq to liq there will be no transfer.

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Old 04-29-2013, 07:38 PM   #6
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The way you described would work, it would be using the top keg as a burping location for the lower keg as it fills and would be creating a "single" pressure vessel. You would want the higher keg to start at a higher pressure than the lower to produce the initial movement and start the siphon, then connect the second keg to the gas line to begin to relief that pressure back to the primary keg as the siphon effect pulls the remaining liquid from the higher keg down.

At least that I how I would expect it to work. YMMV.

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Old 04-29-2013, 07:38 PM   #7
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Here is the pic of the setup, the person (another forum) indicates this creates a completely closed transfer using siphoning (due to different heights)

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Old 04-29-2013, 07:41 PM   #8
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Seems like an autosiphon would be a easier

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Old 04-29-2013, 07:49 PM   #9
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Seems like an autosiphon would be a easier
Not with carbed beer. You have to provide some back pressure to keep from having a foam mess.
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Old 04-29-2013, 07:52 PM   #10
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What is shown in the picture would work, however, unless the receiving keg has been purged of oxygen really well you will probably pick up some oxygen during transfer.
I prefer to use a simple spring pressure relief valve attached to a gas-ball lock on the receiving keg and then adjust it during the jump to achieve about a 2psi difference, which is enough to move the beer along without too much foaming.

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