Product Overview

VBN2, VBN3 CONTROL BALL VALVES WITH THREADED CONNECTIONS
3 62-2648
Table 2. Three-Way C
V
Values.
a
Denotes full port valve (with no insert). Provides linear flow control.
Rangeability
Rangeability is a measure of a valve's controllability
(sometimes referred to as its Turndown Ratio). Rangeability is
a measured property and is expressed as the ratio of a valve's
maximum flow rate to its minimum controllable flow rate.
Table 3. Rangeability of two-way actuated ball valves
C
V
Designator
BCDEFGHJ K LMNPR S
1/2" 0.33 0.59 1.0 2.4 4.3 8.0
3/4" 0.40 0.66 1.3 2.4 3.8 7.0 11.0
a
1" 0.40 0.65 1.3 2.3 3.5 4.5 8.6 14.9 22 31
1-1/4" 4.1 8.7 12.7 19
a
27 34
a
1-1/2" 4.0 8.3 13.4 24 32
a
61
2" 24 38 57 83 109
2-1/2" 38 74 100
a
Valve Size Cv Rangeability
1/2"
0.38 41
0.68 17
1.3 52
2.0 *
2.6 321
4.7 159
8.0 390
11.7 251
3/4"
0.31 41
0.63 17
1.2 52
2.5 321
4.3 159
7.4 *
10.1 390
14.7 251
29 1503
1"
4.4 159
9.0 390
15.3 1040
26 484
44 1263
54 1207
* Data not available at time of printing
1-1/4"
4.4 159
8.3 390
14.9 1040
25 *
37 484
41 1207
102 1263
1-1/2"
23 484
30 *
41 603
74 1263
172 558
2"
42 603
57 *
71 287
100 *
108 558
210 750
266 877
2-1/2"
45 250
55 *
72 287
101 558
162 750
202 877
3"
49 250
63 287
82 558
124 750
145 877
Valve Size Cv Rangeability
* Data not available at time of printing