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 : 17
ASME 150 Series 40/41/4A - 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
1,350 1,070 750 510 330 218 140 81 35
8
2,800 2,230 1,590 1,060 685 456 280 165 65
10
4,300 3,450 2,430 1,630 1,050 700 450 250 100
12
6,650 5,330 3,750 2,530 1,630 1,080 700 390 155
14
7,650 6,100 4,300 2,900 1,890 1,250 810 450 175
16
9,800 7,860 5,510 3,700 2,420 1,530 1,020 580 230
18
10,500 9,100 6,960 5,100 3,520 2,220 1,180 500 170
20
13,500 11,700 8,800 6,500 4,500 2,820 1,530 640 200
24
20,000 17,100 12,800 9,570 6,640 3,880 2,200 920 240
26
20,000 17,100 12,800 9,570 6,640 3,880 2,200 920 240
28
28,000 23,900 18,200 13,500 9,300 5,700 3,100 1,300 290
30
32,000 27,300 20,900 15,500 10,700 6,700 3,600 1,510 320
32
34,000 29,100 22,300 16,500 11,400 7,150 3,850 1,610 340
34
34,000 29,100 22,300 16,500 11,400 7,150 3,850 1,610 340
36
48,500 41,100 31,700 23,200 16,400 10,200 5,430 2,260 480
40
62,000 55,200 44,000 33,300 23,800 15,200 8,600 3,520 670
42
65,000 58,000 46,100 35,000 25,000 16,000 9,000 3,700 700
48
91,000 80,900 63,700 43,600 29,100 20,000 11,000 4,600 920
54
125,000 111,000 87,500 60,000 40,000 27,500 15,000 6,000 1,200
60
160,000 140,000 105,000 75,000 50,000 31,000 17,000 7,000 1,400