Keg Boiler Rocking

[KYMountainMan]

I was half way into a run today and my Boiler started lightly rocking back and forth and the distillate slowed down to a trickle.

Boiler is only half full.

What's causing this?

[der wo]

It's huffing I think.
The chance of huffing rises during the run (higher temp, lower abv).
Liebig or worm?

[KYMountainMan]

Reflux using copper packing and cross cooling at top of column

[der wo]

And the product cooler? Length, diameter.
How much power?
Column diameter?

[KYMountainMan]

Should I lower my Boiler temp and allow it to equalize?

[Badmotivator]

My keg still rocks too, often. I have sight glasses on the side of my boiler, so I can see inside. The rocking is just from vigorous boiling at 4kW. No problem.

[KYMountainMan]

OK. I have my 5500w element just below 1/2 on the controller and it stabilized.

[CopperClayton]

Is it a brand new keg? Is it upside down or right side up? A pic would help. Might just be a dent in the bottom of the rim...

[cranky]

My column rocks depending on some variables. I've run it empty with a packing retainer plate installed and can observe the rising vapor swirling as it exits the keg and enters the column and attribute the rocking to that swirling.

[bitter]

Mine does also.. Rock and Roll!

B