Quick sizing chart for control valves
From Honeywell
Cv |
Steam capacity, lb/hr |
Water capacity, gal/min |
|||||||||||
Vacuum return systems |
Atmospheric return systems |
Differential pressure, psig |
|||||||||||
2-psi supply pressure |
5-psi supply pressure |
10-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
||||||||
3.2-psi pressure drop |
5.6-psi pressure drop |
9.6-psi pressure drop |
1.6-psi pressure drop |
4.0-psi pressure drop |
8.0-psi pressure drop |
2 |
4 |
6 |
8 |
10 |
15 |
20 |
|
0.33 |
7.7 |
11.0 |
16.0 |
5.4 |
9.3 |
14.6 |
0.41 |
0.66 |
0.81 |
0.93 |
1.04 |
1.27 |
1.47 |
0.63 |
14.6 |
20.9 |
30.5 |
10.4 |
17.7 |
27.8 |
0.89 |
1.26 |
1.54 |
1.78 |
1.99 |
2.40 |
2.81 |
0.73 |
17.0 |
24.3 |
35.4 |
12.0 |
20.5 |
32.2 |
1.00 |
1.46 |
1.78 |
2.06 |
2.30 |
2.80 |
3.25 |
1 |
23.0 |
33.2 |
48.5 |
16.4 |
28.0 |
44.0 |
1.40 |
2.0 |
2.44 |
2.82 |
3.16 |
3.90 |
4.46 |
1.6 |
37.1 |
53.1 |
77.6 |
26.8 |
45.0 |
70.6 |
2.25 |
3.2 |
3.90 |
4.51 |
5.06 |
6.20 |
7.13 |
2.5 |
58.25 |
82.9 |
121.2 |
41.9 |
70.25 |
110.25 |
3.53 |
5.0 |
6.10 |
7.05 |
7.90 |
9.68 |
11.15 |
3 |
69.9 |
99.5 |
145.5 |
50.2 |
84.3 |
132.3 |
4.23 |
6.0 |
7.32 |
8.46 |
9.48 |
11.61 |
13.38 |
4 |
93.2 |
132.2 |
194.0 |
67.0 |
112.4 |
177.4 |
5.60 |
8.0 |
9.76 |
11.28 |
12.60 |
15.50 |
17.87 |
5 |
116.2 |
165.2 |
242.5 |
82.7 |
140.5 |
220.5 |
7.10 |
10.0 |
12.2 |
14.1 |
15.8 |
19.4 |
22.3 |
6 |
139 |
200 |
291 |
99 |
168 |
265 |
8.5 |
12.0 |
14.6 |
16.9 |
18.9 |
23.2 |
27.0 |
6.3 |
146 |
209 |
311.5 |
104 |
177 |
278 |
8.9 |
12.6 |
15.4 |
17.8 |
19.9 |
24.4 |
28.1 |
7 |
162 |
233 |
339.5 |
115 |
196 |
309 |
9.9 |
14.0 |
17.1 |
19.7 |
22.1 |
27.1 |
31.0 |
8 |
186.5 |
264.4 |
388 |
131.2 |
224.8 |
352.8 |
11.3 |
16.0 |
19.5 |
22.6 |
25.3 |
31.6 |
35.7 |
10 |
232 |
332 |
485 |
164 |
281 |
441 |
14.1 |
20 |
24.4 |
28.2 |
31.6 |
38.7 |
44.6 |
11 |
256 |
366 |
533.5 |
181 |
309 |
486 |
15.5 |
22 |
27.0 |
31.0 |
34.4 |
42.5 |
49.0 |
13 |
303 |
434 |
630.5 |
213.7 |
365.3 |
373.3 |
18.3 |
27 |
31.7 |
36.7 |
41.1 |
50.3 |
58.0 |
14 |
326 |
465 |
679 |
232 |
393 |
617 |
19.7 |
28 |
34.0 |
39.0 |
44.0 |
54.0 |
62.0 |
15 |
349.3 |
497.6 |
727.5 |
246 |
421.5 |
661.5 |
21.1 |
30 |
36.6 |
42.3 |
47.4 |
58.0 |
66.9 |
16 |
370.9 |
531 |
776 |
268 |
450 |
706 |
22.5 |
32 |
39 |
45.1 |
50.6 |
62 |
71.3 |
18 |
419 |
597 |
873 |
301 |
505 |
794 |
25 |
36 |
44 |
51 |
57 |
70 |
80 |
Cv |
Steam capacity, lb/hr |
Water capacity, gal/min |
|||||||||||
Vacuum return systems |
Atmospheric return systems |
Differential pressure, psig |
|||||||||||
2-psi supply pressure |
5-psi supply pressure |
10-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
||||||||
3.2-psi pressure drop |
5.6-psi pressure drop |
9.6-psi pressure drop |
1.6-psi pressure drop |
4.0-psi pressure drop |
8.0-psi pressure drop |
2 |
4 |
6 |
8 |
10 |
15 |
20 |
|
20 |
466 |
664 |
970 |
335 |
562 |
882 |
28 |
40 |
49 |
56 |
63 |
77 |
89 |
23 |
541 |
763 |
1,115 |
385 |
646 |
1,014 |
32 |
46 |
56 |
65 |
73 |
89 |
103 |
25 |
582.5 |
829 |
1,212 |
419 |
702.5 |
1,102.5 |
35.3 |
50 |
61 |
70.5 |
79 |
96.8 |
111.5 |
27 |
628.2 |
896 |
1,309 |
452.5 |
758.7 |
1,190.7 |
38.1 |
54 |
65.9 |
76.1 |
85.3 |
104.5 |
120.4 |
30 |
699 |
995 |
1,455 |
502 |
843 |
1,323 |
42.3 |
60 |
73.2 |
84.6 |
94.8 |
116.1 |
133.8 |
38 |
885 |
1,257 |
1,833 |
636 |
1,069 |
1,676 |
53 |
76 |
93 |
107 |
120 |
147 |
169 |
40 |
932 |
1,322 |
1,940 |
670 |
1,124 |
1,764 |
56 |
80 |
97.6 |
112.8 |
126 |
155 |
178.7 |
50.0 |
1,162 |
1,652 |
2,425 |
827 |
1,405 |
2,205 |
71 |
100 |
122 |
141 |
158 |
194 |
223 |
56.0 |
1,305 |
1,851 |
2,716 |
938 |
1,574 |
2,469 |
79 |
112 |
137 |
158 |
177 |
217 |
250 |
63.0 |
1,460 |
2,090 |
3,056 |
1,043 |
1,770 |
2,778 |
89 |
126 |
154 |
178 |
199 |
244 |
281 |
75.0 |
1,748 |
2,481 |
3,637 |
1,230 |
2,107 |
3,307 |
106 |
150 |
183 |
212 |
237 |
290 |
335 |
80.0 |
1,865 |
2,644 |
3,880 |
1,312 |
2,248 |
3,528 |
113 |
160 |
195 |
225.6 |
253 |
316 |
357 |
90.0 |
2,096 |
2,980 |
4,365 |
1,476 |
2,529 |
3,969 |
127 |
180 |
220 |
254 |
284 |
348 |
401 |
97.0 |
2,229 |
3,204 |
4,703 |
1,590 |
2,725 |
4,277 |
137 |
196 |
231 |
274 |
307 |
375 |
432 |
100.0 |
2,330 |
3,319 |
4,850 |
1,640 |
2,816 |
4,410 |
141 |
200 |
244 |
282 |
316 |
387 |
446 |
105.0 |
2,442 |
3,481 |
5,092 |
1,722 |
2,950 |
4,630 |
148 |
210 |
256 |
296 |
332 |
406 |
468 |
130.0 |
3,030 |
4,340 |
6,305 |
2,137 |
3,653 |
5,733 |
183 |
270 |
317 |
367 |
411 |
503 |
580 |
150.0 |
3,493 |
4,976 |
7,275 |
2,460 |
4,215 |
6,615 |
211 |
300 |
366 |
423 |
474 |
580 |
699 |
160.0 |
3,709 |
5,310 |
7,760 |
2,680 |
4,500 |
7,060 |
225 |
320 |
390 |
451 |
506 |
620 |
713 |
170.0 |
3,960 |
5,642 |
8,245 |
2,788 |
4,777 |
7,497 |
240 |
340 |
415 |
479 |
537 |
658 |
758 |
Cv |
Steam capacity, lb/hr |
Water capacity, gal/min |
|||||||||||
Vacuum return systems |
Atmospheric return systems |
Differential pressure, psig |
|||||||||||
2-psi supply pressure |
5-psi supply pressure |
10-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
2-psi supply pressure |
||||||||
3.2-psi pressure drop |
5.6-psi pressure drop |
9.6-psi pressure drop |
1.6-psi pressure drop |
4.0-psi pressure drop |
8.0-psi pressure drop |
2 |
4 |
6 |
8 |
10 |
15 |
20 |
|
190.0 |
4,450 |
6,310 |
9,215 |
3,116 |
5,339 |
8,379 |
268 |
360 |
464 |
536 |
600 |
735 |
847 |
244.0 |
5,670 |
7,930 |
11,834 |
4,001 |
6,856 |
10,760 |
344 |
488 |
595 |
688 |
771 |
944 |
1,088 |
250.0 |
5,825 |
8,290 |
12,125 |
4,190 |
7,025 |
11,025 |
353 |
500 |
610 |
705 |
790 |
968 |
1,115 |
270.0 |
6,282 |
8,960 |
13,095 |
4,525 |
7,587 |
11,907 |
381 |
540 |
659 |
761 |
853 |
1,045 |
1,204 |
300.0 |
6,990 |
9,950 |
14,550 |
5,025 |
8,430 |
13,230 |
423 |
600 |
732 |
846 |
948 |
1,161 |
1,338 |
350.0 |
8,160 |
11,590 |
16,975 |
5,860 |
9,835 |
15,435 |
494 |
700 |
854 |
987 |
1,106 |
1,355 |
1,561 |
360.0 |
8,380 |
11,910 |
17,460 |
6,030 |
10,116 |
15,876 |
508 |
720 |
878 |
1,015 |
1,137 |
1,393 |
1,606 |
430.0 |
10,010 |
14,225 |
20,855 |
7,200 |
12,083 |
18,963 |
606 |
860 |
1,049 |
1,213 |
1,359 |
1,664 |
1,918 |
480.0 |
11,180 |
15,860 |
23,280 |
8,045 |
13,408 |
21,168 |
677 |
960 |
1,171 |
1,353 |
1,517 |
1,858 |
2,141 |
640.0 |
14,910 |
21,180 |
31,040 |
10,496 |
17,984 |
28,224 |
902 |
1,280 |
1,561 |
1,805 |
2,022 |
2,477 |
2,854 |
760.0 |
17,700 |
25,120 |
36,860 |
12,464 |
21,356 |
33,516 |
1,071 |
1,520 |
1,854 |
2,143 |
2,401 |
2,941 |
3,390 |
1,000.0 |
23,300 |
33,190 |
48,500 |
16,400 |
28,160 |
44,100 |
1,410 |
2,000 |
2,440 |
2,820 |
3,160 |
3,870 |
4,460 |
1,200.0 |
27,150 |
39,790 |
58,200 |
19,680 |
33,720 |
52,920 |
1,692 |
2,400 |
2,928 |
3,384 |
3,792 |
4,644 |
5,352 |
1,440.0 |
33,290 |
47,160 |
69,840 |
23,616 |
40,464 |
63,504 |
2,030 |
2,880 |
3,514 |
4,061 |
4,550 |
5,573 |
6,422 |