Service Manual PLATINUM ENG.pdf

Ideas with Passion
6.5 SBS Valve
Beverage dispensing
The SBS brewing system valve (see Fig. 2) controllable via the knob, enables variation (increasing
or decreasing according to the position of the knob) of the water flow rate for brewing.
This adjusts the coffee brewing time (extraction time) and consequently the intensity of taste,
keeping the cream quality constant.
Function
With the SBS valve in the open position, coffee is accumulated in the membrane valve due to a
low back-pressure of the SBS valve. Consequently the membrane valve needle remains in the
maximum open position, due to resistance of the spring. Coffee exits quickly (see fig. 3).
With the SBS valve in the closed position, coffee is accumulated on the membrane of the valve
with a consequent increase in pressure in the valve. The spring yields to the back-pressure and
the needle then reduces the coffee passage (see Fig. 4).
Fig.1
Fig.2
TALEA Section 06
REV00 - August 06
Fig.3
Fig.4
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