I just want to share that I filtered about 10.5 BBL of carbonated beer to kegs in about 2.5 hours.
I did not lose carbonation and I am as happy with the result as I can be.
First I want to say that the approach I took is not practical for homebrewer.
I used pump to pull beer out of bright tank that was at 13 psi and pushed it thru the filter at 17 psi to the receiving keg that was at 12 psi.
I used 1 micron cartrage and 20" X 4" Big Blue whole house filter.
Beer did not foam at all.