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Control systems Self-acting controls
Sizes and pipe connections KX31 ½ ", ¾ ", 1", 1 ¼ ", 1 ½ " and 2" Screwed BSP T Rp (ISO 7-1) or NPT. KX33 DN15, DN20, DN25, DN32, DN40 and DN50 Flanged EN 1092 PN16 and BS 10 Table F.
Pressure/temperature limits
Steam saturation curve
Pressure bar g
The product must not be used in this region.
Body design conditions
PN16
Maximum design pressure
16 bar g @ 120 °C
4.5 46
Maximum design temperature
220 °C @ 13 bar g
Minimum design temperature
-10 °C
Maximum operating temperature
220 °C
Minimum operating temperature Note : For lower operating temperatures consult Spirax Sarco
0 °C
Size
DN15 DN20 DN25 DN32 DN40 DN50
KX31
Maximum differential pressure bar
12.0
7.0
3.5
2.3
1.7
1.1
KX33
12.0
7.0
3.5
2.3
1.7
1.1
Designed for a maximum cold hydraulic test pressure of
24 bar g
TI-P078-01 CTLS Issue 10
Page 2 of 5
KX31 and KX33 Cast Iron Self-acting Control Valves
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