44
Control systems Safety valves
Capacity table - AIR - 10% Overpressure - Nm3/h (0ºC and 1.013 bar)
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
1149
1644
2553
3214
3873
5708
9871
14311
1.5
1407
2014
3128
3938
4746
6993
12095
17534
2.0
1666
2384
3703
4662
5618
8279
14318
20757
2.5
1947
2787
4328
5448
6566
9675
16732
24258
3.0
2232
3194
4961
6244
7525
11089
19178
27803
3.5
2516
3601
5593
7040
8485
12503
21624
31349
4.0
2801
4008
6226
7837
9444
13917
24069
34894
4.5
3085
4416
6858
8633
10404
15331
26515
38440
5.0
3370
4823
7491
9429
11364
16745
28960
41985
5.5
3655
5230
8124
10226
12323
18159
31406
45530
6.0
3939
5637
8756
11022
13283
19574
33852
49076
6.5
4224
6045
9389
11818
14243
20988
36297
52621
4.7 10
7.0
4508
6452
10021
12614
15202
22402
38743
56167
7.5
4793
6859
10654
13411
16162
23816
41188
59712
8.0
5077
7267
11286
14207
17121
25230
43634
63258
8.5
5362
7674
11919
15003
18081
26644
46080
66803
9.0
5647
8081
12552
15799
19041
28058
48525
70349
9.5
5931
8488
13184
16596
20000
29472
50971
73894
10
6216
8896
13817
17392
20960
30886
53416
77440
12
7354
10525
16347
20577
24799
36543
63199
91622
14
8492
12154
18877
23762
28637
42199
72981
105804
16
9631
13783
21408
26947
32476
47855
82764
119986
18
10769
15412
23938
30132
36314
53512
92546
134168
20
11907
17041
26468
33317
40153
59168
102329
148350
20.7
12306
17612
27354
34432
41496
61148
105752
153313
For sizing using current areas (ASME), the discharge coefficient K for steam is 0.853.
TI-P709-01 CTLS Issue 1
Page 10 of 13
SV47H SG Iron Safety Valve
Powered by FlippingBook