Combined Torque Coefficient, Lb-In./PSI
for Standard PDC Swing Thru Valves


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VALVE SIZE Disc Angle, Degrees
  0 10 20 30 40 50 60 70 80
2" .3 .3 .4 .5 .6 .9 1.4 2.3 3
2.5" .5 .5 .6 .8 1.1 1.5 2.4 4.2 6
3" .7 .7 1 1.2 1.5 2.4 3.9 7 9
4" 1.7 1.7 2.2 2.8 3.7 5.6 8.5 17 24
5" 2.5 2.5 3.8 4.8 6.5 10 17 30 45
6" 3.8 3.8 5.3 7 10 17 29 52 75
8' 7.5 7.5 13 17 23 38 65 120 180
10" 17 17 25 34 47 79 140 250 370
12" 23 23 38 53 75 130 220 400 600
14" 37 37 60 80 120 190 310 590 850
16" 45 45 80 115 170 260 460 820 1,300
18" 70 70 130 175 260 460 700 1,200 1,800
20" 90 90 160 220 320 507 900 1,600 2,300
22" 122 122 215 297 434 714 1,215 2,156 3,100
24" 159 159 282 391 566 937 1,595 2,828 4,065
26' 205 205 362 499 725 1,202 2,005 3,627 5,215
28" 258 258 456 628 913 1,512 2,525 4,565 6,560
30" 319 319 564 777 1,130 1,872 3,125 5,651 8,120
32" 384 384 680 937 1,362 2,257 3,770 6,814 9,790
34" 464 464 820 1,130 1,644 2,723 4,545 8,219 11,810
36" 554 554 979 1,349 1,961 3,248 5,420 9,806 14,090
38" 654 654 1,157 1,593 2,317 3,838 6,405 11,585 16,645
40" 765 765 1,355 1,866 2,713 4,494 7,500 13,567 19,495
42" 889 889 1,574 2,168 3,152 5,222 8,710 15,763 22,650
44" 1,026 1,026 1,815 2,501 3,636 6,024 10,050 18,184 26,130
46" 1,176 1,176 2,080 2,867 4,168 6,904 11,520 20,814 29,945
48" 1,340 1,340 2,371 3,266 4,749 7,866 13,125 23,746 34,120
54" 1,921 1,921 3,427 4,684 6,809 11,279 18,805 34,050 48,925
60" 2,651 2,651 4,689 6,461 9,394 15,560 25,940 46,973 67,495

*In no case should actuator torque be less than the following values:

Valve Size Minimum Torque
2" - 6" 50 LB-IN
8" - 14" 120 LB-IN
16" - 24" 200 LB-IN
26" - 30" 300 LB-IN
32" - 38" 400 LB-IN
40" - 48" 500 LB-IN
54" 750 LB-IN
60" 1000 LB-IN

Additional Information