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Cv (US) values Cv (US) = Cv (UK) x 1.2009 Control systems Control valves
Valve size
½"
¾"
1"
1¼"
1½"
2"
2½"
3"
4"
High capacity Equal % 5.7
8.3 7.3 7.3
20.2 18.0 18.0
36.0 29.0 29.0
53.0 42.0 42.0
Equal % 4.6
12.0 12.0
85.0 85.0
116.0 185.0 116.0 185.0
Linear
4.6
Full port
Fast opening Equal %
5.7
8.3
12.7
21.0
36.0
58.0
104.0 135.0 208.0
2.9 2.9 1.8 1.8 1.2 1.2
4.6 4.6 2.9 2.9 1.8 1.8 1.2 1.2
7.3 7.3 4.6 4.6 2.9 2.9 1.8 1.8 1.2 1.2 0.6
12.0 12.0
18.0 18.0 12.0 12.0
29.0 29.0 18.0 18.0 12.0 12.0
42.0 42.0 29.0 29.0 18.0 18.0
85.0 85.0 42.0 42.0 29.0 29.0 18.0 18.0
116.0 116.0
Reduced trim 1 Reduced trim 2 Reduced trim 3 Reduced trim 4 Reduced trim 5
Linear
Equal %
7.3 7.3 4.6 4.6
73.0 73.0 42.0 42.0
Standard trim
Linear
Equal %
7.3 7.3 4.6 4.6
Linear
Equal %
7.3 7.3 4.6 4.6
Linear
Equal %
Linear
4.1 62
0.58 0.23
0.58 0.23 0.12
0.23
Microflute (linear only) (not available with C Seat option)
0.12 0.12 0.081 0.081 0.081 0.012 0.012 0.012 Note: For low noise and anti-cavitation Cv please see TI-S24-59
TI-S24-72 CTLS Issue 7
Page 6 of 23
Spira-trol TM Two-port Control Valves ASME Standard K and L Series ½" to 4"
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