Control systems Safety valves
4
Capacity Table - Steam - 10% Overpressure - kg/h
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
1.0
212 347 545
889
1,273 1,652 1,976 2,489 2,998 4,420 7,643
1.5
260 426 668 1,089 1,560 2,024 2,421 3,049 3,673 5,415 9,365
2.0
308 504 790 1,290 1,846 2,396 2,866 3,610 4,349 6,410 11,086
2.5
356 589 924 1,507 2,158 2,800 3,349 4,218 5,082 7,491 12,956
3.0
403 675 1,059 1,727 2,473 3,210 3,839 4,835 5,825 8,586 14,850
3.5
451 761 1,194 1,948 2,788 3,619 4,329 5,451 6,568 9,681 16,743
4.0
499 847 1,329 2,168 3,104 4,028 4,818 6,068 7,310 10,776 18,637
4.5
547 933 1,464 2,388 3,419 4,437 5,308 6,685 8,053 11,871 20,530
5.0
595 1,019 1,599 2,608 3,734 4,847 5,797 7,301 8,796 12,966 22,424
5.5
642 1,105 1,734 2,829 4,050 5,256 6,287 7,918 9,539 14,061 24,318
6.0
690 1,192 1,869 3,049 4,365 5,665 6,776 8,534 10,282 15,156 26,211
4.7 71
6.5
738 1,278 2,003 3,269 4,680 6,075 7,266 9,151 11,024 16,251 28,105
7.0
786 1,364 2,138 3,490 4,996 6,484 7,756 9,767 11,767 17,346 29,999
7.5
835 1,450 2,273 3,710 5,311 6,893 8,245 10,384 12,510 18,441 31,892
8.0
885 1,536 2,408 3,930 5,627 7,303 8,735 11,000 13,253 19,536 33,786
8.5
934 1,622 2,543 4,150 5,942 7,712 9,224 11,617 13,996 20,630 35,680
9.0
983 1,708 2,678 4,371 6,257 8,121 9,714 12,233 14,738 21,725 37,573
9.5
1,032 1,794 2,813 4,591 6,573 8,530 10,203 12,850 15,481 22,820 39,467
10
1,082 1,880 2,948 4,811 6,888 8,940 10,693 13,467 16,224 23,915 41,360
12
1,279 2,225 3,488 5,692 8,149 10,577 12,651 15,933 19,195 28,295 48,935
14
1,476 2,569 4,028 6,573 9,411 12,214 14,609 18,399 22,166 32,675 56,510
16
1,672 2,913 4,568 7,455 10,672 13,851 16,568 20,865 25,137 37,054 64,084
18
1,869 3,258 5,108 8,336 11,934 15,488 18,526 23,331 28,109 41,434 71,659
20
2,066 3,602 5,648 9,217 13,195 17,126 20,484 25,798 31,080 45,814 79,233
22
2,263 3,946 6,188 10,098 14,457 18,763 22,442 28,264 34,051 50,194 86,808
24
2,460 4,291 6,728 10,979 15,718 20,400 24,401 30,730 37,022 54,573 94,382
26
2,657 4,635 7,268 11,860 16,979 22,037 26,359 33,196 39,993 58,953 101,957
28 2,854 4,979 7,808 12,741 18,241 23,674 28,317 35,662 42,964 63,333 109,531 30 3,051 5,324 8,348 13,622 19,502 25,311 30,275 38,129 45,936 67,712 117,106 32 3,248 5,668 8,888 14,504 20,764 26,949 32,234 40,595 48,907 72,092 124,680
Capacity Table - Steam - 10% Overpressure - kg/h continued on next page
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 11 of 15
SV66H Safety Valve
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