| The information on this page is for use of technicians
and experienced persons. All others do so at their own
risk.
Please Note: PulyCaf, Cafiza and CleanCaf are
only for cleaning coffee and backflushing commercial machines. If
you are using these as descaling chemicals, it can harm the
machine.
Traditional Home Espresso
Machines Have the Following Parts:
1. A brass or
aluminum boiler (16 to 40 oz. capacity).
2. A boiler outlet valve to help increase the
pressure of water, before it is pumped through coffee
grounds.
3. An oscillating pump with or without external
thermostat.
4. A steam valve with a knob to open & close
steam/hot water outlet.
5. Thermostat to limit temperature of
water or steam.
Limit for espresso
water temperature: 90°C to 98°C
Limit for steam
temperature: between 127°C
to 152°C.
6. A thermofuse to shut power supply when
temperature in the boiler exceeds the higher limit
(usually 185°C).
7. Solenoid valve (selected Gaggia models
only).
8. A filter cup holder handle to place
ground coffee for extraction of espresso.
The pump models generally are easy to open. In
most brands, the top cover is fixed with two to four screws. In the
Barista/Rio Vapore models, the top cover curves around to the back
and the top has two screws. The front end has about 1/3" 90
degree lip. This 90 degree lip is wedged between two
plates. It may be necessary to use a long screw driver or other rod,
pushed under the top cover, alternatively on either side of the
machine to nudge the cover free and lift up. Note the slide along
the left side in the picture below. Once the top cover is
taken off, the entire internal set up can be viewed. The
pictures below show two popular models:
1. Gaggia Model Espresso (without solenoid
valve)
2. Saeco Espresso Classico (rapid steam
model)
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