Data Sheet
Bulletin 74.3:ACE97
10
Table 12. NPS 3 / DN 80 Depad Valve Capacities of 1.0 Specific Gravity Air
(1)
m
C
v
C
v
C
v
Nm
Nm
Nm
2
3
4
5
5
7
10
12
5400
6700
7700
8600
145
180
206
230
7000
8500
9800
11,000
188
228
263
295
8500
10,400
12,000
13,400
228
279
322
359
6
7
8
9
10
15
17
20
22
25
9400
10,200
10,900
11,600
12,200
252
273
292
311
327
12,100
13,000
13,900
14,800
15,600
324
348
373
397
418
14,700
15,900
17,000
18,000
19,000
394
426
456
482
509
12
14
16
18
20
30
35
40
45
50
13,400
14,400
15,400
16,400
17,300
359
386
413
440
464
17,100
18,500
19,700
20,900
22,100
458
496
528
560
592
20,800
22,500
24,000
25,500
26,900
557
603
643
683
721
22
24
26
28
30
55
60
65
70
75
18,100
18,900
19,700
20,400
21,200
485
507
528
547
568
23,200
24,200
25,200
26,100
27,100
622
649
675
699
726
28,200
29,500
30,700
31,800
32,900
756
791
823
852
882
1.0 psig
1.1 psig
1.2 psig
1.3 psig
1.4 psig
69
76
83
90
97
20,300
21,300
22,300
23,200
24,100
544
571
598
622
646
26,000
27,300
28,500
29,600
30,800
697
732
764
793
825
31,600
33,200
34,700
36,100
37,500
847
890
930
967
1005
1.5 psig
1.6 psig
1.7 psig
1.8 psig
1.9 psig
103
110
117
124
131
24,900
25,700
26,500
27,300
28,100
667
689
710
732
753
31,800
32,900
33,900
34,900
35,900
852
882
909
935
962
38,800
40,100
41,300
42,500
43,700
1040
1074
1107
1139
1171
2.0 psig
2.1 psig
2.2 psig
2.3 psig
2.4 psig
138
145
152
159
165
28,800
29,500
30,200
30,900
21,600
772
791
809
828
579
36,800
37,700
38,600
39,500
40,300
986
1010
1034
1059
1080
44,800
45,900
47,000
48,100
49,100
1201
1230
1260
1289
1316
2.5 psig
2.6 psig
2.7 psig
2.8 psig
172
179
186
193
32,200
32,900
33,500
34,100
863
882
898
914
41,200
42,000
42,800
43,600
1104
1126
1147
1168
50,100
51,100
52,100
53,100
1343
1369
1396
1423
1. Always use the differential pressure between tank pressure (depad setpoint) and vent header (vapor recovery) pressure to calculate ow through the depad valve.