GE masoneilan_39003_series Service Manual Page 12

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12 | GE Oil & Gas
Rated Flow Coefficients (C
V
) and Pressure Recovery Coefficients (F
L
)
Rated Flow Coefficients (C
V
)
The values shown are for the valve installed in the seal upstream (“SUS”) position.
Valve Size ANSI Class
Degree Open/% Full C
V
10° 20° 30° 40° 50° 60° 70° 80° 90°
1.5% 6% 14% 25.2% 38% 55% 75% 97% 100%
2
150 1.5 6 14 25 39 56 76 99 102
300 1.4 6 13 24 36 52 71 95 100
600 1.4 5 13 23 35 51 70 90 93
3
150 3.4 14 32 57 87 125 141 221 228
300 3.2 13 30 53 81 117 159 212 223
600 3.1 12 29 52 79 114 156 202 208
4
150 6.8 27 63 114 171 248 338 437 451
300 6.2 25 58 104 157 228 310 414 435
600 5.8 23 54 98 147 213 290 375 387
6
150 15.5 66 154 278 419 607 827 1070 1103
300 14.9 60 139 250 377 546 744 992 1041
600 14.7 59 137 247 372 538 734 950 979
8
150 30.9 124 289 520 784 1135 1584 2002 1064
300 27.3 109 255 459 692 1001 1365 1820 1911
600 26.8 107 250 451 679 983 1341 1734 1788
10
150 52.8 211 492 886 1336 1934 2638 3411 3817
300 45.6 183 26 767 1156 1673 2282 3042 3194
600 41.2 165 384 692 1044 1511 2060 2665 2747
12
150 72.6 290 677 1219 1838 2660 3628 4690 4837
300 63.3 253 590 1063 1602 2319 3163 4217 4428
600 58.4 233 545 981 1479 5140 2918 3774 3891
14
150 90 392 914 1646 2481 3592 4898 6530 6857
300 81 326 760 1368 2063 2986 4072 4530 5702
600 73 292 682 1228 1838 2680 3655 4727 4873
16
150 132 531 1230 2229 3361 4865 6634 8845 9287
300 109 435 1015 1827 2755 3988 5438 7850 8243
600 96 385 899 1619 2423 3533 4818 6231 6424
18
150 171 684 1596 3873 4332 6270 8550 11270 11400
300 139 555 1295 2331 3515 5088 6938 9250 9712
20
150 207 828 1932 3478 3244 7590 10350 13800 14420
300 158 630 1470 2646 3990 5775 7875 10150 10658
24
150 315 1260 2940 5292 7890 11550 15750 21000 22050
300 242 966 2254 4057 6118 8855 12075 16100 16205
30
150 491 1965 4585 8253 12445 18012 24563 32750 34388
300 404 1614 3769 6779 10222 14795 20175 26900 28245
36 150 707 2830 6602 1184 17920 25938 35370 45745 47160
42 150 963 3851
8987 16176 24392 35304 48143 62264 64190
48 150 1258 5030 11738 21128 31859 46111 62881 81324 83840
Pressure Recovery Coefficients (F
L
)
Disc Degree Opening
15
o
20
o
25
o
30
o
35
o
40
o
45
o
50
o
55
o
60
o
65
o
70
o
75
o
80
o
85
o
90
o
Seal Upstream .95 .91 .84 .81 .78 .80 .77 .74 .74 .73 .70 .66 .63 .60 .57 .53
Seal Downstream .94 .89 .84 .82 .80 .77 .75 .72 .69 .66 .63 .30 .58 .55 .54 .53
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