technological solutions
TECHNICAL DATA SHEET
Cav. Uff. Giacomo Cimberio S.p.A.
4
Balancing:
Flow rate balancing is achieved automatically by Cim 790, regardless pressure fluctua-
tions. The flow rate of each cartridge depends on the fixed orifice installed therein. Each
fixed orifice has a four digit code number,corresponding to the last four digits of Cimberio
cartridge code.
Once the cartridge is identified by Cimberio code, the relevant flow rates and minimum Δp
can be read in the tables shown in “Tables” section of this brochure.
Using the electronic differential manometer Cim 726, check that the differential pressure is
higher or the same as the minimum value shown in said tables. The differential manometer
interfaces with the balancing valve through two sensors inserted in the binder points of the
valve.
Calibrated orifice
Typical installations:
LOAD:
Power (kW)
Differential
temperature (°C)
Controller
LOAD:
Power (kW)
Differential
temperature (°C)
Controller
Cim 790 is suitable for constant volume system, where diverting or mixing valves are in-
stalled as fancoil control. Below a typical installation with a diverting valve: in each moment
the flow rate will result constant and there will not be extra-flow due to the pressure fluc-
tuations introduced by the hidraulic shortcircuit that would be created when the flow goes
across the by-pass.
The automatic flow balancing valves can also be used with variable speed pumps. By us-
ing a 2 ports control valve (ON/OFF), the flow in each emitters can be stopped as soon as
the desired room temperature in reached. In this way the branches that are still opened will
not be affected by the total flow variations. The effect is that there is an energy saving due
to the reduction of the total pumped flow.
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