EB 3128 EN
27
Start-up and operation
Table 5:
Flow rate set points in m³/h for water
Valve size DN
DN 15
DN 20 DN 25 DN 32
DN 40
DN 50
K
VS
coefficient
0.4
1)
1.0
1)
2.5
1)
4.0
6.3
8.0
12.5
16.0
20.0
2)
20.0
25.0
2)
Flow rate set
point range in
m³/h at a diff.
pressure across
the restriction ...
0.2 bar
0.01
to 0.2
0.12
to
0.64
0.2
to
1.2
0.1
to
2.5
0.1
to
3.6
0.1
to
4.2
0.3
to
10
0.4
to
12.5
0.4
to 15
0.3 bar
–
–
–
0.1
to
3
–
0.1
to
5
–
–
–
2)
Special versions
3)
K
VS
coefficient with flanged valve body
Flow rate
1
2
3
4
5
6
7
8
9
10
11
0.01
0.02 0.03 0.05
0.1
0.2 0.3
0.5
1
2
3 4 5 6 7 8 910 15
V
m
3
/h
DN 15
K
VS
0.4
DN 15
K
VS
1
DN 15
K
VS
2.5
DN 20
K
VS
6.3
DN 32
K
VS
12.5
Turns of the set point screw or scale
divisions
One scale division <> One turn of the set point screw
Fig. 9:
Set point adjustment for flow rate (guide) · DN 15, 20 and 32
Differential pressure across the restriction
Δ
p
restriction
= 0.2 bar