Which version of Brewtus? The first had a teflon screw on the opv valve that became problematic after adjusting the pressure. The first of the BII had teflon as well. They were later switched to an opv with a brass adjusting screw. I replaced mine with one of these after I had problems with my original teflon screw opv on my BII. Strangely enough, Expobar has again gone back to using an opv with a teflon screw on the new BIII machines. I would say go ahead and adjust it, especially if it is a brass screw. If it is teflon, be prepared to "possibly" have some future problems with it. Not a big deal to change it out if you do. Use the blind filter in the portafilter to get it down to about 8.5 to 9 on the guage. Check again when you actually pull a shot that it is around 8.5. I will assume that you will have properly tamped to about 30 pounds.
On Jan 25, 12:27 pm, Chris Bailey <[email protected]> wrote: > I've seen a fair bit of talk on the list about adjusting pressure. Given > the fact that there's tape over the pressure adjust screw on my machine, and > all the warnings about don't touch it, only let the factory do it, etc, > etc., I'm leery of messing with it. Also, my understanding is that > supposedly the factory has pulled shots and checked the pressure and set it > properly. > But, I've just wondered about it. My pressure gauge typically reads about > 11 bar when I'm pulling shots. I'm unclear on whether it's supposed to read > the true 8.5-9 bar that an espresso should be done at, or whether the gauge > is a pressure at a different point in the system and thus the real pressure > at the PF is lower, or not. > > Can folks discuss this a bit? Other than taste, are there ways for me to > know whether my machine is set right or not, and/or if I'm going to adjust > it (and potentially void my warranty?) how can I know when I've set it to > the right spot? From the reading I've done I think I understand that too > much pressure can actually cause a build up and not get things flowing > properly (which seems a bit backwards, but I sort of understand). > > Anyway, let me know what folks think. > > -- > Chris Bailey > [email protected] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Brewtus" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/brewtus?hl=en -~----------~----~----~----~------~----~------~--~---
