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Control systems Self-acting controls
Dimensions/weights (approximate) in mm and kg
KX31 and KX33 DN15 - DN25
KX31 and KX33 DN32 - DN50
C
C
B
B
A
A
A1
A1
NPT / BSP
PN16
BS 10 'F'
Weight
4.5 48
Size
A
A1
A1
B
C
KX31
KX33
DN15-½"
90
130
130
68
106
1.5
3.4
DN20-¾"
104
150
147
68
106
1.8
4.4
DN25-1"
136
160
157
80
108
3.3
5.8
DN32-1¼"
144
180
180
80
112
5.3
8.9
DN40-1½"
150
200
200
90
112
6.4
11.1
DN50-2"
180
230
230
100
112
7.9
13.1
Kv values DN
15
20
25
32
40
50
For conversion: Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Kv
2.90
4.64
9.80
16.48
23.70
34.0
Capacities For saturated steam sizing capacities see TI-GCM-08. For water valve sizing capacities see TI-GCM-09.
Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions supplied with the product.
Installation note: The valve should be fitted in a horizontal line with the actuator vertically below the pipeline.
How to order Example: 1 off Spirax Sarco 2" KY31 self-acting control valve having screwed BSP connections.
TI-P078-01 CTLS Issue 10
Page 4 of 5
KX31 and KX33 Cast Iron Self-acting Control Valves
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