Came across this while looking for help on how to turn down the brew pressure on a single boiler w/PID. In short, the Bezzera factory claims that smaller vibratory pumps need to be adjusted to a higher pressure than larger rotary pumps. I.E., they set the vibe pumps in home machines to 11 Bar and the Rotary pumps in Commercial machines to 9 Bar. And I can confirm they set the vibe pump in my BZ Unica to crank out 11.7+ Bars.
The host starts off in German but also translates into English as well, so don't give up. Give it a minute or so.
Maybe I'm confused, but isn't a "Bar", a "Bar". Irregardless of whether it's generated from a small vibe pump or larger more powerful rotary pump? What am I missing?