44
Control systems Self-acting controls
Pressure/temperature limits
Kv values Size
¾"
1"
1½"
Cast iron valves - flanged PN16
Kv
4.64
8.96
20.29
Size
DN50
DN80
DN100
Kv
41.20
97.85
118.45
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Pressure bar g
The product must not be used in this region.
Stroke mm Size
¾"
1"
1½"
Bronze valves - screwed
Stroke
2.7
4.3
5.9
Size
DN50
DN80
DN100
Stroke
7.7
12.4
13.9
4.5 66
Sizing See TI-GCM-09.
Pressure bar g
Cast iron
PN16
Body design conditions
Bronze
PN25
Cast iron
16 bar g @ 120 °C
Maximum design pressure
Bronze
25 bar g @ 120 °C
Cast iron
200 °C @ 13.5 bar g
Maximum design temperature
Bronze
200 °C @ 21.0 bar g
Cast iron
-10 °C
Minimum design temperature
Bronze
-90 °C
Maximum operating temperature
Cast iron
200 °C @ 13.5 bar g
Bronze
200 °C @ 21.0 bar g
Cast iron
-10 °C
Minimum operating temperature
Bronze
-20 °C
Note: For lower operating temperatures consult Spirax Sarco Maximum differential pressure ¾ ", 1" and 1 ½ " DN50, DN80 and DN100
3.4 bar
2.7 bar
Designed for a maximum cold hydraulic test pressure of:
Cast iron
24 bar g
Bronze
37.5 bar g
Leakage rate
1% of full Kv (see overleaf for Kv values)
TI-P047-01 CTLS Issue 14
Page 2 of 5
TW Three-port Self-acting Control Valve for Liquid Systems
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