Dimensions in mm
This data sheet is designed as a guide and should not be regarded as wholly accurate in every detail. We reserve the right to amend the specification of any product without notice.
ART24 Differential Pressure
Control Valve (DPCV)
Page 14
Emitter
E1
E2
E3
E4
E5
-
Section from 1 to
1
2
3
4
5
-
Connection pipe
Con.1
Con.2
Con.3
Con.4
Con.5
-
∑Δ
p
i,A
7.09
9.53
11.45
12.46
12.68
kPa
Δ
p
con,A
1.08
0.79
0.29
0.22
0.28
kPa
∑Δ
p
i,A
+
Δ
p
con,A
8.17
10.32
11.74
12.68
12.96
kPa
Kv Control valve
0.60
0.60
0.43*
0.43*
0.43*
(m
3
/h)/bar
0.5
Δ
p
V,A
5.24
4.60
2.77
2.99
3.72
kPa
Kv lockshield val-
ve**
2.7
2.7
2.7
2.7
2.7
(m
3
/h)/bar
0.5
Δ
p
LV,A
0.26
0.23
0.07
0.08
0.09
kPa
Δ
p
reg
13.66
15.15
14.58
15.75
16.78
kPa
Δ
p
bal
3.12
1.63
2.20
1.03
0.00
KPa
* The Kv of the thermostatic valves is taken with a proportional band of 1K.
** The Kv is related to the lockshield valve when it is fully open.
Where:
Δ
p
V,A
is the pressure loss across the control valve;
Δ
p
LV,A
is the pressure loss across the lockshield valve;
Δ
p
reg
is the required differential pressure for the emitter;
Δ
p
bal
is the required pressure loss across the balancing valve or lockshield valve;
The DPCV will be set with the maximum differential pressure (
Δ
p
reg,DPCV
)
in order to supply
each emitters with the nominal
fl
ow. In this example we have 16.78 kPa, it is necessary to
instal balancing valves in order to avoid extra
fl
ows in the other branches where it would be
required a lower value of pressure. The pressures introduced with the manual balancing
valves can be calculated using the following relation:
While in the radiator it is possible to use the lockshield valves, in the fan coils it is possible
to install a balancing valve like the ART28:
Emitter
E1
E2
E3
E4
E5
-
Δ
p
bal
3.12
1.63
2.20
1.03
0.00
KPa
Balancing Kv
0.78
1.01
0.49
0.73
-
(m
3
/h)/bar
0.5
Cim 787
DN15
DN15
-
-
-
-
Preset
0.6
0.9
-
-
-
-
Lockshield valve
Kv ***
-
-
0.48
0.71
-
(m
3
/h)/bar
0.5
* The Kv is calculated taking into consideration that the pressure across the fully open
lockshield valve was already used.
