44
Control systems Safety valves
Capacity Table - Steam - 3% Overpressure - kg/h
Orifice Designation / Current Area (cm²)
Set pressure (bar g)
J
K
L
M
N
P
Q
R
8.867
12.69
19.71
24.81
29.90
44.06
76.20
110.47
1.0
857
1226
1904
2397
2888
4256
7361
10671
1.5
1055
1511
2346
2953
3559
5245
9070
13150
2.0
1254
1795
2788
3510
4230
6233
10780
15628
2.5
1453
2080
3231
4066
4901
7222
12489
18106
3.0
1652
2365
3673
4623
5571
8210
14199
20585
3.5
1851
2649
4115
5180
6242
9198
15908
23063
4.0
2050
2934
4557
5736
6913
10187
17618
25541
4.5
2249
3219
4999
6293
7584
11175
19327
28019
5.0
2452
3509
5450
6860
8268
12183
21071
30547
5.5
2657
3802
5906
7434
8959
13202
22832
33100
6.0
2862
4095
6361
8007
9650
14220
24592
35652
6.5
3067
4389
6817
8580
10341
15238
26353
38205
4.7 6
7.0
3271
4682
7272
9154
11032
16256
28114
40758
7.5
3476
4975
7727
9727
11722
17274
29875
43310
8.0
3681
5268
8183
10300
12413
18292
31635
45863
8.5
3886
5562
8638
10873
13104
19310
33396
48416
9.0
4091
5855
9094
11447
13795
20328
35157
50968
9.5
4296
6148
9549
12020
14486
21346
36918
53521
10
4501
6441
10005
12593
15177
22364
38678
56073
12
5320
7614
11826
14886
17941
26437
45721
66284
14
6140
8787
13648
17180
20704
30509
52764
76494
16
6959
9960
15470
19473
23468
34581
59807
86705
18
7779
11133
17292
21766
26231
38654
66850
96915
20
8599
12306
19113
24059
28995
42726
73893
107126
20.7
8885
12716
19751
24862
29962
44152
76358
110699
For sizing using current areas (ASME), the discharge coefficient K for steam is 0.853.
TI-P709-01 CTLS Issue 1
Page 6 of 13
SV47H SG Iron Safety Valve
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