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Table 3-1: Technical data · Valve · All pressures in bar (gauge)
Valve size
Body with
screwed ends
K
coefficient
VS
Flanged body
Body with
screwed ends
x
value
FZ
Flanged body
Pressure rating
Max. permissible differential pressure
∆p across the valve
Max. permissible valve temperature
Differential pressure set point
Conformity
Additional version: valve with flanged body made of spheroidal graphite iron (EN-GJS-400-18-LT)
1)
Special version
2)
Table 3-2: Flow rate set point ranges
Flow rate set point ranges
Δp
Δp
set point
plant
Δp
Calculation
plant
+ Δp
for plant
restriction
0.2 bar
0.1 bar
0.3 bar
0.1 bar
Special version
1)
An increase in noise level can be expected when the specified flow rate is exceeded, even if cavita-
2)
tion does not occur (see AGFW (German District Heating Association) document FW 514).
See Fig. 3-3 to calculate the minimum required differential pressure Δpmin between the flow
pipe and return flow pipe.
EB 3132-3 EN
DN
0.4
1.0
2)
V
for water in m³/h
DN
Δp
restriction
K
VS
Differential
pressure
across the
V
min.
restriction
0.1 bar
V
max. 0.14 0.45 0.85
0.2 bar
V
max.
Design and principle of operation
15
20
2.5
4.0
6.3
2)
2)
–
0.6
–
PN 25
20 bar
Liquids 150 °C
Adjusted to 0.2 bar
15
0.4
1.0
2.5
4.0
1)
1)
0.01 0.12
0.2
0.5
1.8
0.2
0.64
1.2
2.5
–
1.3
25
32
40
1)
8.0
12.5
16.0
12.5
20.0
0.55
0.5
0.45
20
25
32
6.3
8.0
12.5 16.0 20.0
1)
0.8
0.8
2
2.6
3.6
7.1
3.6
4.2
10.0 12.5 15.0
2.3
3.5
5.8
2)
2)
2)
2)
50
1)
1)
20.0
25.0
0.45
0.4
16 bar
40
50
3
4
8.5
10.7
9.1
14.1
2)
2)
3-7
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