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Technical leaflet Cim 776 & Cim 777
Revisione 0
Emissione 03/2011
Operation principles
Regulation
When electric actuator or plastic cap is missing, the valve is normally closed by a swing. On the contrary, if
plastic cap is screwed or electric actuator installed therein, they win the force of the swing and open the
valve (see picture 4). The inlet water goes through a modulating control component whose geometry can be
modified by turning the presetting dial, according to the required flow rate in the system branch where the
valve is installed.
Control
Two different pressures operate on the DPC cartridge. The first one is transmitted through the passage
connecting the valve inlet to the lower section of “p+” cartridge (see hydraulic scheme picture 5); the second
one is registered at valve outlet by the flow rate selecting device “pa”. In order to keep constant the
difference between the mentioned pressures, the DPC cartridge obturator operates by closing the water
outlet bore to reach the preset flow rate, regardless of fluctuating pressure conditions of the system.
Modulation
The electrical actuator performs the modulating function changing the section of flow passage. When
continuous modulation is carried out, the temperature is kept under control.
Cim 777
keeps the same
obturator stroke, regardless of the presetting dial position. With continuous modulation, control is excellent
even with small flow opening. This eliminate on/off effect.
Picture 4
DPC
cartridge
e
a
Calibrated
flow
Picture 5
Presetting
dial
