Product Catalogue

PDC Reduced Port Series 15 - 3" thru 14" 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)

Valves Size Disc Angles, Degrees
10 20 30 40 50 60 70 80 90
3" x 2.5" 4 8 20 34 56 84 126 178 194
4" x 3" 6 14 30 51 85 132 202 279 370
5" x 4" 13 28 54 98 159 257 391 550 747
6" x 5" 21 43 88 158 265 429 636 913 1,272
8" x 6" 30 63 126 228 382 632 955 1,370 1,999
10" x 8" 53 111 225 406 680 1,125 1,698 2,591 3,853
12" x 10" 83 174 351 635 1,063 1,759 2,655 4,052 6,361
14" x 12" 120 252 506 914 1,531 2,533 3,826 5,835 9,164

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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