Product Overview

Modern heating and air-conditioning systems have to guarantee a high level of thermal comfort with a low energy consumption. This means
supplying the system terminals with the correct design flow rates, to produce balanced hydraulic circuits.
Circuit balancing
Circuits balanced with FlowCal
FlowCal balances
the hydraulic circuit
by automatically
controlling the design
flow rate to each
emitter. Even with some
circuits partially closed
by the control valves,
the flow rates in the
open circuits remain
constant at the
nominal value. The
system always provides
the greatest comfort
and the highest energy
savings.
FULL LOAD
Control
valve
(closed)
PARTIAL LOAD
FLOWCAL
FLOWCAL
100 %
100 %
100 %
Flow rate
100 %
0 %
100 %
Flow rate
Circuits balanced with manual valves
Traditionally, hydraulic
circuits are balanced
using manual calibration
valves. With these static-
type devices, such circuits
are difficult to balance
perfectly and have
operating limitations in
case of partial closure
by means of the control
valves. The flow rate in
the open circuits does
not remain constant at
the nominal value.
FULL LOAD PARTIAL LOAD
Manual valve
FULL LOAD
Control
valve
(closed)
PARTIAL LOAD
FLOWCAL
FLOWCAL
Manual valve
100 %
100 %
100 %
Flow rate
140 %
0 %
120 %
Flow rate
100 %
100 %
100 %
Flow rate
100 %
0 %
100 %
Flow rate
Unbalanced circuits
In case of an unbalanced
circuit, the hydraulic
imbalance between
emitters creates areas
with temperatures which
are not uniform, and, as
a consequence, problems
with thermal comfort and
high energy consumption.
50 %
140 %
180 %
Flow rate