Sounds like a conformation to me. Nothing to worry about, normal operation.
Thx, Rob On Feb 25, 5:01 pm, "Dennis Keating" <[email protected]> wrote: > The water filling the brew boiler isn't cold, but rather preheated in the > steamboiler at a higher temp. > My OPV goes off at 11 bar. > Dennis > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > > Of bobvilax2000 > Sent: Thursday, February 25, 2010 9:35 AM > To: Brewtus > Subject: Re: Rotary Upgrade - Group Head Pressure rising > > "cold water is filling up the boiler and then being heated, as it is heated > it expands, as the boiler is saturated there is not a lot of room for the > pressure to be absorbed resulting in high pressures being created quite > quickly, sort of like a hydraulic brake system. Pressure get to 12Bar and > the OPV valve opens to release it. > Once temp stabilises, no more increase in pressure. " > > Bingo. If there is no opv then you would have burst tubes. My rotary > B1 rotary doesn't drip after a shot but, like all espresso machines, drips > almost the whole warmup since the entire machine is heating from about 20C > to 93C, which means a lot of water expansion and pressure. I forget what I > have my opv set to (Brewt 1, so no brew gauge), but it's probably around > 12psi as well. > > - -Barrett > > -- > 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 > athttp://groups.google.com/group/brewtus?hl=en. -- 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.
