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INSTALLATION AND OPERATING MANUAL
6. FLOW RATE/PRESSURE DROP CHARACTERISTICS
These models are fitted with a balancing valve (figure 5). This device is used to balance the flow of water circulating in the
single module in case of non-optimal distribution in the inlet pipes. Figure 4 shows the
Flow Rate - Pressure Drop
curve
with balancing valve in the wide open position.
Figure 4: Flow rate – Pressure drop curves
1007_1401
PRESSURE DROP IN HEATING CIRCUIT
PRESSURE DROP (
m
H
2
O)
WATER FLOW (l/h)
Figure 5 shows the
Flow rate – Pressure drop
curves with various positions of the adjustment screw “A”. Curve “A” re-
fers to one full turn of the knob starting from its closed position. The subsequent curves indicate additional 1/2 half turns
of the knob with respect to the previous curve. Curve “H” represents the valve fully open.
Figure 5: Detail of hydraulic assembly
CHARACTERISTIC CURVE OF BALANCING VALVE
PRESSURE DROP (
m
H
2
O)
WATER FLOW (l/h)
BY-PASS
ADJUSTMENT
HEATING
RETURN FLOW
ADJUSTMENT
4
3
2
1
