Sbs Valve; Beverage Dispensing - Gaggia PLATINUM VOGUE Technical & Service Manual

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6.5

SBS Valve

The SBS brewing system valve (see Fig. 2) controllable via the knob, enables variation (increas-

ing 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.2

Fig.1

Fig.3

Fig.4

TALEA Section 06

4/6

REV00 - August 06

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