44
Control systems Self-acting controls
Table 4 Pressure/temperature limits for different valve materials Note: Materials for the various valve types are shown in Tables 5 and 6 on the following pages.
Control valve body material
Gunmetal
Cast iron
Cast carbon steel
Body design conditions
PN25
PN16
PN25
PN40
Maximum design temperature
260 °C
220 °C
300 °C
300 °C
Maximum cold hydraulic test
38 bar g
24 bar g
38 bar g
60 bar g
Gunmetal
100 150 200 260
Note: The KB51 and KY51 control valves have a maximum design temperature limit of 232 °C.
Steam saturation curve
0 50
0
5
10
15
20
25
Pressure bar g
4.5 6
Cast iron
100 150 200 220
Steam saturation curve
0 50
2 4 6 8 10121416
0
Pressure bar g
Cast carbon steel
100 150 200 250 300
Note: The KB43 control valves have a maximum design temperature limit of 232 °C.
Steam saturation curve
0 50
10
20
30
40
0
Pressure bar g
The product must not be used in this region.
TI-S21-07 CTLS Issue 6
Page 6 of 13
2-Port Self-acting Temperature Control Valve Selection for Heating and Cooling Applications
Powered by FlippingBook