User Manual
Bray/McCannalok HPBV – Valve Sizing Coefficients
All information herein is proprietary and condential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Coefficients : 18
ASME 300 Series 42/43/4B - Valve Sizing Coefficient (Cv)
Valve
Size
Inches
Disc Position (Degrees)
90º 80º 70º 60º 50º 40º 30º 20º 10º
2 1/2 160 136 100 78 50 30 16 8 3
3 185 178 155 123 87 56 32 14 5
4 375 365 315 250 175 115 63 31 10
5 790 675 500 360 238 146 78 41 16
6 1,000 875 710 530 370 240 138 79 26
8 2,000 1,720 1,360 950 630 405 240 121 47
10 2,650 2,250 1,740 1,200 780 510 295 150 61
12 4,000 3,400 2,500 1,690 1,100 710 430 220 92
14 4,100 3,500 2,600 1,770 1,200 830 490 240 100
16 7,800 6,540 4,550 2,970 1,840 1,160 730 420 180
18 9,500 8,000 6,170 4,530 3,110 1,970 1,080 440 94
20 11,000 9,570 7,300 5,400 3,720 2,330 1,250 530 110
24 18,000 15,100 11,400 8,570 5,920 3,700 2,000 830 180
30 29,000 24,400 18,900 13,700 8,500 6,000 3,230 1,330 290
36 45,000 38,100 29,200 21,000 14,800 9,100 4,660 1,730 380
42 60,000 54,000 42,000 30,000 19,000 13,000 7,500 2,600 450
48 83,000 74,000 58,000 41,000 26,000 17,000 10,000 4,400 800
54
Please Consult Factory
ASME 600 Series 44/45 - Valve Sizing Coefficient (Cv)
Valve
Size
Inches
Disc Position (Degrees)
90º 80º 70º 60º 50º 40º 30º 20º 10º
3 165 158 135 103 67 46 12 8 3
4 300 270 210 150 95 70 45 30 5
6 800 765 600 425 270 200 130 70 15
8 1,500 1,350 1,050 750 480 345 209 78 20
10 2,200 1,970 1,540 1,100 700 500 300 140 40
12 3,100 2,790 2,170 1,550 1,000 680 400 190 55
14 3,900 3,300 2,400 1,570 1,100 730 420 200 70
16 5,000 4,200 2,900 1,900 1,200 800 500 250 95
18 6,000 5,000 3,900 2,800 1,900 1,200 660 290 130
20 8,000 6,900 5,300 3,900 2,700 1,700 950 400 143
24 11,000 9,300 7,000 5,200 3,600 2,250 1,200 500 180
30 15,000 13,000 10,000 8,400 5,100 2,800 1,650 600 200