EB 2171 EN
19
Design and principle of operation
Table 1:
Technical data · All pressures in bar (gauge)
Type 2431 and Type 2432 Valves
Valve size
G ½ to G 1 · DN 15 to 25
DN 32 to 50
Pressure rating
PN 25
Max. perm. differential pressure ∆p
20 bar
12 bar
Max. perm. valve temperature
150 °C
Leakage class according to IEC 60534-4
Metal seal: leakage class I (≤0.05 % of K
VS
coefficient)
Soft seal: leakage class IV (≤0.01 % of K
VS
coefficient)
Conformity
·
Type 2430 Control Thermostat
Set point range
1)
(continuously adjustable)
0 to 35 °C · 25 to 70 °C · 40 to 100 °C
50 to 120 °C · 70 to 150 °C
Capillary tube
2 m · 5 m
3)
Max. perm. temperature at the sensor
50 K above the adjusted set point
Permissible ambient temperature range
–20 to 80 °C
2)
Perm. pressure at sensor
PN 25
Permissible pressure at thermowell
PN 40
Conformity
1)
Further set point ranges on request
2)
At temperatures below freezing: ice formation may damage the plant and especially the valve
3)
Special version
Table 2:
K
VS
coefficients
Type 2431 and Type 2432 Valves
Type 2431
G ½
G ¾
G 1
–
K
VS
3.6
1)
5.7
7.2
Type 2432
DN 15
2) 3)
DN 20
3)
DN 25
2) 3)
DN 32
3)
DN 40
3)
DN 50
3)
K
VS
4.0
1)
6.3
8.0
12.5
16.0
20.0
1)
Special version with K
VS
0.4, 1 or 2.5
2)
Flanged valve body made of stainless steel
3)
Flanged body made of spheroidal graphite iron
