I have spunding valves for my brewhemoth conicals and I've used them a time or two when transferring beer under pressure to reduce O2 and also to move beer against gravity when it gets near the bottom of the conical. But, as I understand them, they have a pressure release that would allow for the beer to off-gas at a certain PSI. I have also heard repeatedly that larger breweries can get by with fermenting warmer because beer fermented under pressure has less ester formation etc and produces a cleaner ferment.
So, I am curious if it is possible to set this valve to maintain a certain vessel pressure that would replicate the pressures or at least some of the pressures that a large tank would exert on the beer. I don't know what pressures the conicals are rated for, when I keg, I've been running them at or below 5 PSI so that I don't move the beer to quickly and also to avoid over pressure.
Does anyone actually know what the osmotic pressure would be on yeast in a large tank and what pressure might simulate that?