Re: Woolworths Espresso maker (UK)

In article <1130392709.779839.71200@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
MikeSlog <michaelsloggett@xxxxxxxxxxxxxxx> wrote:
> One more thing, on the 3-way valve issue. I choked the Cafe Roma a few
> times, and had to wait and then very slowly remove the portafilter to
> avoid spraying grounds everywhere, so it doesn't seem to me that the
> selector acts as a 3-way to release pressure on the puck. Perhaps what
> drips into the back of the drip tray is the output of an overpressure
> valve, or something else?

um.. perhaps it may be better to describe the valve as
releasing pressure from the Group, rather than the pf.

The only pressure that would then remain is that already
stored within the pf's basket - the shower screen only
being a smidgin below the heating base of the group head..

Turning the valve to the centre thus switching off the
pump and allowing any excess to drain internally to the
drip tray does seem to curtail the mousetail(s) almost
immediately ..so it is a positive in preventing over-
extraction..

I haven't tried this yet - but will shortly - and that is
to centralise the valve/switch at the appropriate time -
and then just allow the mousetails to shut off as the
pressure relaxes - leaving the pf fully in place and the
cup fully in place until any the minor drip ceases.

The contents of the drip tray - on the release of pressure
- should remain clear if the contents are purely from the
'root' of the group. However, if there is any 'suck-back'
- sort of a negative pressure wave involving the pf basket
itself, then the contents of the clean drip tray might just
become slightly coffee-coloured.

I haven't thought to try this, but the result might be
easyish to spot.. Just a thought..

...all this and more, for only 29.99gbp..

Wow! This really is a stake in advanced education... ;))

Bill ZFC

--
Bill ZFC
http://www.billsimpson.com/
.

Relevant Pages

  • Re: Pressure cookers: an update
    ... > always leaked more steam than I would like. ... > quality pressure cookers are expensive ... > The article (and other pressure cooker tips) is discussed at ... > rather than a spring pressure regulator valve. ...
    (rec.food.equipment)
  • Re: Pressure cookers: an update
    ... I just ordered the Kuhn Rikon 7-Qt after reading about pressure cookers. ... > always leaked more steam than I would like. ... > The article (and other pressure cooker tips) is discussed at ... > rather than a spring pressure regulator valve. ...
    (rec.food.equipment)
  • Re: The LIMEX MIDI system MPR4 for piano, CBA, diatonic , concertina
    ... allow modulation by bellows pressure. ... concertina to add the MIDI while retaining the reed operation. ...
    (rec.music.makers.squeezebox)
  • Re: 85 Jetta Fuel Pressure test - bad differential pressure regulator?
    ... IF the cold start valve is functioning then at least the engine should ... Pressure Tests and Specifications. ... I got a system pressure of 79 psi, which is in the 76-81 psi range in ... fuel pump relay jumpered, valve open, DPR ...
    (rec.autos.makers.vw.watercooled)
  • Re: Faema C85/A help
    ... Brew pressure is adjusted at the pump bypass. ... This is a picture of the inlet. ... water intake pressure adjusment. ... the inlet valve from blow-by. ...
    (alt.coffee)