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Excel Series 40 - 2" thru 60" for High Temperature & Dirty Service 125/150 lb. Flanging*

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Cv Values for PDC Swing Thru Butterfly Valves

By definition, Cv is the flow coefficient of a control device or flow restriction. Cv is defined as the number of US gallons of 60°F water per minute which will flow through the given restriction with a one pound per square inch pressure drop.

Cv Values
(Flow in GPM of 60°F water at 1 psi pressure drop, specific gravity=1)

Valve Size Disc Angle, Degress
10 20 30 40 50 60 70 80 90
2" 2 5 11 20 34 49 64 83 90
2.5" 4 8 20 34 56 84 126 178 194
3" 6 14 30 51 85 132 202 279 370
4" 13 28 54 98 159 257 391 550 747
5" 21 43 88 158 265 429 636 913 1,272
6" 30 63 126 228 382 632 955 1,370 1,999
8" 53 111 225 406 680 1,125 1,698 2,591 3,853
10" 83 174 351 635 1,063 1,759 2,655 4,052 6,361
12" 120 252 506 914 1,531 2,533 3,826 5,835 9,164
14" 143 302 606 1,096 1,835 3,035 4,584 6,992 10,981
16" 191 400 805 1,455 2,436 4,118 6,388 9,835 12,266
18" 244 513 1,032 1,865 3,123 5,279 8,185 12,608 15,725
20" 305 640 1,287 2,326 3,896 6,584 10,209 15,725 19,612
22" 372 781 1,570 2,838 4,753 8,033 12,456 19,186 23,929
24" 445 936 1,882 3,401 5,696 9,626 14,926 22,990 28,674
26" 526 1,105 2,221 4,015 6,723 11,364 17,619 27,139 33,848
28" 613 1,288 2,589 4,679 7,836 13,245 20,536 31,632 39,451

 

Valve Size Disc Angle, Degress
10 20 30 40 50 60 70 80 90
30" 706 1,485 2,985 5,395 9,035 15,270 23,676 36,468 45,484
32" 800 1,682 3,382 6,112 10,235 17,299 26,823 41,315 51,528
34" 907 1,906 3,832 6,926 11,599 19,603 30,395 46,817 58,392
36" 1,020 2,144 4,311 7,791 13,047 22,052 34,191 52,664 65,684
38" 1,140 2,396 4,818 8,707 14,581 24,644 38,211 58,855 73,405
40" 1,267 2,682 5,352 9,674 16,200 27,380 42,453 65,390 81,555
42" 1,400 2,942 5,915 10,691 17,904 30,260 46,919 72,268 90,134
44" 1,540 3,236 6,507 11,760 19,693 33,284 51,608 79,491 99,143
46" 1,687 3,544 7,126 12,879 21,568 36,453 56,520 87,057 108,508
48" 1,840 3,866 7,774 14,049 23,527 39,765 61,656 94,968 118,446
54" 2,340 4,916 9,885 17,865 29,910 50,566 78,403 120,762 150,617
60" 2,899 6,093 12,250 22,139 37,065 62,663 97,159 149,653 186,650

While this information is presented in good faith and believed to be accurate, PDC inc. does not guarantee results from reliance upon such information. Nothing contained herein is to be construed as a warranty or guarantee, expressed or implied, regarding the merchantability, fitness or any other matter with respect to the products. PDC Inc. reserves the right, without notice, to alter or improve the designs of the products herein.

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