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AHEAD OF THE FLOW ®<br />
www.nibco.com<br />
(Throttling Factors)<br />
For throttling use with disc partially open. Multiply Cv by factor.<br />
NOTE: Gate valves are not throttled.<br />
200 250 300 350 400 450 500 600 750 900<br />
8 10 12 14 16 18 20 24 30 36 0 10 20 30 40 50 60 70 80 90 100<br />
4,150 6,700 9,925 13,800 18,375 23,600 29,600 43,570<br />
0 .35 .65 .90 .93 .96 .98 .99 1.00 1.00 1.00<br />
0 .03 .035 .06 .1 .16 .24 .32 .47 .68 1.00<br />
860 1,390 0 .35 .65 .90 .93 .96 .98 .99 1.00 1.00 1.00<br />
WARNING<br />
2,937 4,730 6,985<br />
2,670 4,300 6,350<br />
1,500 2,357 3,742<br />
1,115 1,770 2,500 3,400 4,400 5,600 6,900 10,000 15,400 22,400<br />
900 1,450<br />
1,740 3,180 5,270<br />
1,600 2,700 4,000<br />
2,164 3,507 5,516<br />
10,200 14,400 25,300<br />
3,759 5,300 7,969 11,917 16,383 21,705 27,908 43,116 60,922 86,375<br />
3,450 5,800 8,950<br />
The Fluid Flow factors contained herein are calculated values. They are,<br />
therefore, approximations and cannot be used for highly critical flow or<br />
pressure drop calculations. For very precise flow measurements, tests must be<br />
conducted on any valve mentioned within this catalog. Throttling of ball valves<br />
is not recommended when valves are less than 45° open.<br />
0 10 20 30 40 45 50 60 70 80 90<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .01 .05 .16 .30 .37 .45 .58 .71 .87 1.00<br />
0 .03 .06 .12 .18 .22 .27 .40 .56 .80 1.00<br />
NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227<br />
TECH SERVICES PH: 1.888.446.4226 • FAX: 1.888.336.4226 • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: +1.574.295.3455<br />
www.nibco.com<br />
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