Data Sheet
Bulletin 71.2:310A
8
Table 5. Regulating Flow Coefficients for Body Size Piping
Table 6. Regulating Flow Coefficients for 2:1 Swaged Piping and 100% Trim
COEFFICIENT
AT PERCENT
OF MAXIMUM
TRAVEL
TRIM SIZE (PERCENT OF FLOW CAPACITY) BY BODY SIZE, INCHES (DN)
1 (25) 2 (50) 3 (80) 4 (100) 4 x 6 (100 x 150)
100% 50% 30% 100% 70% 50% 30% 100% 70% 50% 30% 100% 70% 50% 30% 100% 70% 50% 30%
10%
C
g
65 60 56 210 200 190 185 346 340 325 305 805 725 615 510 895 800 780 760
C
v
2.2 2.0 2.0 7.6 7.5 6.9 7.0 12.5 11.6 11.3 10.8 29.6 24.0 22.6 19.2 41.6 32.0 33.2 31.4
20%
C
g
115 93 83 460 396 311 260 810 735 615 460 1800 1310 1040 705 2235 1680 1420 1160
C
v
4.0 3.2 3.0 16.6 14.9 11.3 9.8 29.3 25.2 21.4 16.3 66.2 43.4 38.2 26.6 104.0 67.2 60.4 47.9
30%
C
g
210 124 107 810 583 430 325 1520 1120 85 606 3100 1990 1480 917 3800 2550 2050 1550
C
v
7.3 4.2 3.8 29.2 21.9 15.6 12.3 55.1 38.4 3.0 21.4 114.0 65.9 54.4 34.6 176.7 102.0 87.2 64.0
40%
C
g
343 151 126 1120 758 540 385 2380 1480 1130 755 4350 2650 1900 1130 5510 3300 2650 1940
C
v
11.9 5.1 4.5 40.4 28.5 19.6 14.6 86.2 50.7 39.4 26.7 159.9 87.7 69.9 42.6 256.3 132.0 112.8 80.2
50%
C
g
427 178 140 1440 925 646 444 3270 1840 1380 902 5480 3280 2300 1340 7300 4150 3250 2330
C
v
14.8 6.0 5.0 52.0 34.8 23.4 16.8 118.5 63.0 48.1 31.9 201.5 108.6 84.6 50.6 339.5 166.0 138.3 96.3
60%
C
g
485 204 150 1750 1090 744 502 3890 2190 1630 1060 6310 3950 2730 1540 9010 5010 3840 2720
C
v
16.8 6.9 5.4 63.2 41.0 27.0 19.0 140.9 75.0 56.8 37.5 232.0 130.8 110.4 58.1 419.1 200.4 163.4 112.4
70%
C
g
523 226 159 2040 1240 841 561 4410 2540 1880 1210 7040 4550 3140 1740 10580 5870 4430 3110
C
v
18.2 7.7 5.7 73.6 46.6 30.5 21.3 159.8 87.0 65.5 42.8 258.8 150.7 115.4 65.7 492.1 234.8 188.5 128.5
80%
C
g
549 250 168 2260 1400 946 624 4820 2900 2130 1360 7640 5110 3540 1950 12100 6720 5030 3500
C
v
19 8 6 82 53 34 24 175 99 74 48 281 169 130 74 563 269 214 145
90%
C
g
573 272 177 2430 1550 1040 690 5080 3210 2380 1510 8140 5700 3950 2200 13600 7570 5650 3870
C
v
20 9 6 88 58 38 26 184 110 83 53 299 189 145 83 633 303 240 160
100%
C
g
597 289 184 2520 1700 1130 761 5330 3530 2640 1670 8670 6390 4390 2680 14900 8450 6320 4120
C
v
21 10 7 91 64 41 29 193 121 92 59 319 212 161 101 693 338 269 174
C
1
28.8 29.5 28 27.7 26.6 27.6 26.4 27.6 29.2 28.7 28.3 27.2 30.2 27.2 26.5 24.5 25 23.5 24.2
COEFFICIENT AT PERCENT
OF MAXIMUM TRAVEL
TRIM SIZE (PERCENT OF FLOW CAPACITY) BY BODY SIZE, INCHES (DN)
1 (25) 2 (50) 3 (80) 4 (100) 4 x 6 (100 x 150)
10%
C
g
60 210 340 810 850
C
v
2.0 7.1 11.6 28.1 29.8
20%
C
g
115 450 825 1700 2050
C
v
3.8 15.2 28.3 59.0 71.9
30%
C
g
205 795 1540 3050 3300
C
v
6.7 26.8 52.7 105.9 115.8
40%
C
g
330 1110 2350 4300 4650
C
v
10.8 37.4 80.5 149.3 163.2
50%
C
g
395 1380 3025 5400 6050
C
v
13.0 46.5 103.6 187.5 212.3
60%
C
g
450 1610 3550 6200 7430
C
v
14.8 54.2 121.6 215.3 260.7
70%
C
g
490 1800 3900 3900 8700
C
v
16.1 60.6 133.6 135.4 305.3
80%
C
g
515 1960 4200 7400 9860
C
v
17 66 144 257 346
90%
C
g
533 2055 4440 7800 10800
C
v
17 69 152 271 379
100%
C
g
548 2140 4610 8150 11600
C
v
18 72 158 283 407
C
1
30.5 29.7 29.2 28.8 28.5
Table 7. IEC Sizing Coefficients
BODY SIZE, INCHES (DN) 1 (25) 2 (50) 3 (80) 4 (100) 4 x 6 (100 x 150)
X
T
0.53 0.49 0.48 0.47 0.29
F
D
0.66 0.59 0.56 0.48 0.58
F
L
0.74 0.74 0.74 0.74 0.74