Product Catalogue

PDC Medium Duty Series 01 - 2" thru 24" for 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 1,1698 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

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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