44
Control systems Self-acting controls
Pressure/temperature limits
A
Steam saturation curve
C
B
Pressure bar g
The product must not be used in this region. A - B Screwed, flanged EN 1092 PN40 and ASME 300. A - C Flanged ASME 150.
Body design conditions
PN40
Maximum design pressure
37 bar g @ 50 °C
A - B A - C
260 °C @ 27.7 bar g
Maximum design temperature
260 °C @ 11.5 bar g
Minimum design temperature
-10 °C
4.5 86
A - B A - C
260 °C @ 27.7 bar g
Maximum operating temperature
260 °C @ 11.5 bar g
Minimum operating temperature Note: For lower operating temperatures consult Spirax Sarco
0 °C
Size
DN15
DN20
DN25
DN32
DN40
DN50
KA61
17.0
10.0
4.5
-
-
-
Maximum differential pressure bar
KA63
17.0
10.0
4.5
3.0
2.0
1.5
KC63
-
-
-
16.0
16.0
13.8
Designed for a maximum cold hydraulic test pressure of
60 bar g
Kv values Size KA61 and KA63
DN15
DN20
DN25
DN32
DN40
DN50
2.90
4.64
9.80
16.48
23.70
34.00
KC63
-
-
-
16.48
16.48
34.00
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Capacities For saturated steam sizing capacities see TI-GCM-08. For water valve sizing capacities see TI-GCM-09.
TI-P078-08 CTLS Issue 7
Page 2 of 5
KA61, KA63 and KC63 Stainless Steel Self-acting Control Valves
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