Modulating Control Valves

Experience has shown that control valve applications frequently require valves to be sized smaller than the adjacent piping to obtain satisfactory control. In many cases, especially with small NPS valves, reduced flow area and characterized trims are required.

Recognizing this, Nil-Cor has established a series of standard port sizes that cover most applications:

Ball Valve Capacity Cv    
   
      V-Port Trim Sizes
Valve Size Full Area Cv Linear Cv 15-deg. 30-deg. 60-deg 90-deg
1" 75 1, 3, 9 8 19 34 50
1-1/2" 115 3, 8, 16 10 25 47 80
2" 135 4, 8, 15, 20 13 27 53 110
3" 350 22, 37, 65 35 60 119 275
4" 540 NA 70 108 211 375
6" 1240 NA 175 248 484 800
8" 2200 NA 310 440 858 1419

For more information on Nil-Cor Control Valves, contact your nearest Nil-Cor Representative or visit our contact page.