44
Control systems Safety valves
Capacity Table - Steam - 3% Overpressure - kg/h (continued)
Orifice Designation / Actual Area (cm²)
Set Pressure (bar g)
F Q 2.116 3.464 5.432 8.864 12.69 16.47 19.70 24.81 29.89 44.06 76.20 G H J K K2 L M N P
34
3,445 5,640 8,844 14,431 20,661 26,815 32,073 40,393 48,664 71,734 124,061
36
3,642 5,962 9,349 15,256 21,842 28,348 33,907 42,702 51,446 75,835 131,153
38
3,839 6,285 9,855 16,082 23,023 29,881 35,741 45,012 54,228 79,936 138,246
40
4,036 6,607 10,361 16,907 24,204 31,414 37,574 47,321 57,010 84,037 145,338
42 4,233 6,929 10,866 17,732 25,385 32,947 39,408 49,630 59,792 88,138 152,431 44 4,430 7,252 11,372 18,557 26,566 34,480 41,242 51,939 62,574 92,239 159,523 46 4,627 7,574 11,877 19,382 27,747 36,013 43,075 54,249 65,356 96,340 166,616 48 4,824 7,897 12,383 20,207 28,929 37,546 44,909 56,558 68,138 100,441 173,708 50 5,021 8,219 12,889 21,032 30,110 39,079 46,743 58,867 70,920 104,542 180,801 55 5,513 9,025 14,153 23,094 33,063 42,911 51,327 64,640 77,876 114,794 60 6,005 9,831 15,417 25,157 36,016 46,744 55,911 70,413 84,831 125,047 65 6,498 10,637 16,681 27,220 38,968 50,576 60,495 76,187 91,786 135,299 70 6,990 11,443 17,945 29,282 41,921 54,409 65,079 81,960 98,741 145,552 75 7,483 12,249 19,209 31,345 44,874 58,241 69,663 87,733 80 7,975 13,055 20,473 33,407 47,827 62,074 74,247 85 8,467 13,861 21,737 35,470 50,780 65,906 78,831
4.7 70
For sizing purpose using the ASME actual areas, the certified coefficient of discharge Kd for air, gas and steam is 0.865 lb/h = Kg/h / 0.4536
TI-P276-01 CTLS Issue 1
Page 10 of 15
SV66H Safety Valve
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