Announcement

Collapse
No announcement yet.

Testing Silvias pressure without a gauge

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #76
    Thanks folks

    Comment


    • #77
      Hating to add to this thread. I've a Rancilio Silvia v6 and adjusted the OPV to show 10 bar (+/- 0.5) on a portafilter static gauge and double checked with a flow rate of 130ml per 30 seconds +/-5ml. Happy that this is as close as I can get to "9 bars"; but at what?

      Should this be at the pump or the group? Listening to James Hoffman for the 1500 pound machines, he talks about 9 bars at the pump. Also, the OPV spring kit for my Gaggia from Shades of Coffee would be a definite 9 bar at the pump (OPV connected directly to pump) and much less at the group. But this seems odd, because the loss between the pump and the group is not constant between machines - and 9 bar on a lever machine is, I expect, at the group. My question is: is it 9 bar at the pump or the group?

      I check earlier in this thread where someone mentioned that a static gauge of 10 at the group is the "maximum". I presume this is when checking the Ulka E models for the E5 (http://ulka-ceme.co.uk/Ulka_E_Models.html) you look at the red line, in which case it give 8 bars at the group and means 9 bars at the pump.

      It all seems akin to using chicken bones and entrails to adjust the brew pressure to the correct setting. Any advice gratefully received.

      Comment

      Working...
      X