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Design and principle of operation
Table 1: Technical data for Type 2489 Valve
Valve size DN
Body with
screwed
K
VS
ends
coef-
ficient
Flanged
body
Body with
screwed
X
ends
Fz
value
Flanged
body
Pressure rating
Max. perm. diff.
pressure ∆p across
the valve
Leakage class acc. to
IEC 60534-4
(percent of K
)
VS
Max. permissible
temperature
Perm. transportation
temperature
Conformity
Flow rate set point ranges for water in m³/h
Flow rate set point
range/limitation for
water with 0.2 bar
differential pressure
at the restriction
Special version
1)
Additional version: valve with flanged body made of spheroidal graphite iron (EN-GJS-400-18-LT)
2)
Operating diaphragm and seals made of FKM
3)
Use an intermediate insulating piece (1992-3132).
4)
−
For medium temperatures between –10 to +5 °C (electric actuators)
−
In networks with a constant medium temperature ≥135 °C (electric actuators)
−
For liquids ≥120 °C (electric actuators)
An increase in noise level can be expected when the specified flow rates are exceeded, even if cavitation does not
5)
occur (see AGFW (German District Heating Association) document FW 514).
5 m³/h with 0.3 bar differential pressure at the restriction (special version)
6)
18
15 to 25
1)
0.4
1.0
I ≤0.05 %
IV ≤0.01 %
For liquids 150 °C
0.03 to
0.12 to
0.2 to
0.2
0.64
1.2
15
20
4.0
2.5
6.3
—
0.6
—
PN 25
20 bar
I ≤0.05 %
· For air and non-flammable gases 150 °C
4)
–20 to +70 °C
·
0.6 to
0.8 to
1.3
2.3
5)
5)
0.6 to
0.8 to
2.5
3.6
25
32
40
2)
8
12.5
16
12.5
20
0.5
0.45
IV ≤0.01 %
3) 4)
0.8 to
3 to
2 to
3.5
9.1
5)
5.8
5)
0.8 to
3 to
2 to 10
4.2
12.5
6)
EB 3135-2 EN
50
2)
2)
20
25
0.45
0.4
16 bar
4 to
5)
14.1
5)
4 to 15
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