User Guide

High-Capacity Rotary Valves
Product Flier
PF51.3:Vee-Ball
May 2009
16
Flow Coefficients
Table 14. Fisher V150, V200, and V300 (Forward Flow)
VALVE SIZE
VALVE ROTATION, DEGREES (LINE SIZE EQUALS VALVE SIZE)
10 30 60 90 10 30 60 90 10 30 60 90 10 30 60 90
DN NPS C
v
K
v
F
L
X
T
Composition Seals, Flat Metal Seals (DN 50 - DN 300 and NPS 3 - 12), and Flow Ring Construction
25
(1)
40
(1)
50
(1)
80
1
(1)
1-1/2
(1)
2
(1)
3
.0098
.014
.028
.746
2.53
6.15
9.60
27.7
12.4
27.8
46.1
120
34.6
76.0
123
321
.0085
.012
.024
.645
2.19
5.32
8.30
24.0
10.7
24.0
39.9
104
29.9
65.7
106
278
.93
.87
.94
.91
.90
.86
.90
.88
.84
.82
.83
.80
.69
.73
.75
.74
.392
.492
.386
.664
.571
.548
.585
.628
.507
.516
.559
.501
.275
.328
.366
.302
100
150
200
250
4
6
8
10
3.56
5.34
6.99
43.5
47.2
82.1
122
252
195
340
518
1000
596
1100
1820
3000
3.08
4.62
6.05
37.6
40.8
71.0
106
218
169
294
448
865
516
952
1570
2600
.88
.93
.89
.85
.90
.91
.90
.88
.80
.80
.82
.80
.62
.58
.54
.56
.697
.574
.526
.219
.792
.770
.735
.735
.518
.518
.537
.473
.221
.200
.176
.189
300
- - -
- - -
- - -
12
14
16
20
44.2
60.0
70.0
110
390
541
692
993
1530
1670
2380
3070
3980
5610
8270
10,300
38.2
51.9
60.6
95.2
337
468
599
859
1320
1450
2060
2660
3440
4850
7150
8910
.81
.89
.89
.89
.83
.79
.79
.79
.78
.80
.80
.80
.63
.37
.37
.73
.366
.999
.273
.999
.632
.605
.566
.605
.490
.593
.452
.593
.245
.198
.133
.198
HD (Heavy-Duty) Metal Seats
C
v
F
L
X
T
25
40
50
80
1
(1)
1-1/2
(1)
2
(1)
3
.0503
.0180
.020
.169
2.53
4.20
6.75
24.1
11.3
23.2
40.4
112
33.1
70.8
122
338
.0435
.0156
.017
.146
2.19
3.63
5.84
20.8
9.77
20.1
34.9
96.9
28.6
61.2
106
292
.95
.91
.89
.96
.94
.94
.91
.91
.88
.87
.87
.82
.68
.70
.72
.73
.829
.591
.749
.710
.687
.683
.589
.597
.553
.561
.558
.563
.243
.265
.314
.278
100
150
200
250
4
6
8
10
.108
.996
1.41
7.28
34.2
56.9
94.7
199
158
290
481
897
539
1070
1750
2950
.093
.862
1.22
6.30
29.6
49.2
81.9
172
137
251
416
776
466
925
1510
2550
.89
.94
.96
.97
.94
.95
.89
.90
.82
.84
.80
.79
.64
.58
.51
.54
.941
.578
.348
.107
.718
.788
.693
.664
.605
.544
.508
.494
.233
.185
.158
.174
300
- - -
- - -
- - -
12
14
16
20
7.48
56.0
30.0
105
291
502
600
942
1300
1550
2040
2910
4010
5200
7840
9770
6.47
48.4
26.0
90.8
252
434
519
815
1120
1340
1770
2520
3470
4500
6780
8450
.97
.89
.89
.89
.92
.79
.79
.79
.82
.80
.80
.80
.60
.37
.37
.37
.800
.999
.965
999
.710
.605
.593
.605
.508
.593
.533
.593
.228
.198
.135
1.98
Micro-Notch V-Notch Ball (Metal Ball with Composition or HD (Heavy-Duty) Metal Seal
C
v
F
L
X
T
25 1 .0143 .360 1.43 5.23 .0124 .311 1.24 4.52 .95 .93 .90 .88 .551 .660 .620 .578
Micro-Notch V-Notch Ball (Ceramic Ball with HD (Heavy-Duty) Metal Seal
C
v
F
L
X
T
25 1 .0180 .415 1.78 3.64 .0156 .389 1.54 3.15 .90 .94 .90 .92 .581 .693 .612 6.12
1. The coefficient listed for 10 degrees was measured at 12 degrees rotation.
Conversion of Sizing Coefficients
Following are conversions for use with other
common sizing equations.
K
v
= (0.865)C
v
C
1
= 39.76(pX
T
)
C
g
= C
v
C
1
K
m
= F
L
2
C
s
= 1/20(C
g
). C
s
is only applicable for inlet
pressures up to 70 bar(a)
Line-to-Valve Size Ratios Greater than
1-to-1
Contact your Emerson Process Management sales
office for information on determining the F
P
, the
piping geometry factor.