44
Control systems Safety valves
Capacity Table - Steam - 3% Overpressure - kg/h
Orifice Designation / Current Area (cm²)
Set pressure (bar g)
F R 2.112 3.464 5.433 8.867 12.69 19.71 24.81 29.90 44.06 76.20 110.47 1.0 204 335 525 857 1226 1904 2397 2888 4256 7361 10671 1.5 251 412 647 1055 1511 2346 2953 3559 5245 9070 13150 2.0 299 490 769 1254 1795 2788 3510 4230 6233 10780 15628 2.5 346 568 890 1453 2080 3231 4066 4901 7222 12489 18106 3.0 394 645 1012 1652 2365 3673 4623 5571 8210 14199 20585 3.5 441 723 1134 1851 2649 4115 5180 6242 9198 15908 23063 4.0 488 801 1256 2050 2934 4557 5736 6913 10187 17618 25541 4.5 536 879 1378 2249 3219 4999 6293 7584 11175 19327 28019 5.0 584 958 1502 2452 3509 5450 6860 8268 12183 21071 30547 5.5 633 1038 1628 2657 3802 5906 7434 8959 13202 22832 33100 6.0 682 1118 1753 2862 4095 6361 8007 9650 14220 24592 35652 6.5 730 1198 1879 3067 4389 6817 8580 10341 15238 26353 38205 7.0 779 1278 2004 3271 4682 7272 9154 11032 16256 28114 40758 7.5 828 1358 2130 3476 4975 7727 9727 11722 17274 29875 43310 8.0 877 1438 2256 3681 5268 8183 10300 12413 18292 31635 45863 8.5 926 1518 2381 3886 5562 8638 10873 13104 19310 33396 48416 9.0 974 1598 2507 4091 5855 9094 11447 13795 20328 35157 50968 9.5 1023 1678 2632 4296 6148 9549 12020 14486 21346 36918 53521 10 1072 1758 2758 4501 6441 10005 12593 15177 22364 38678 56073 12 1267 2078 3260 5320 7614 11826 14886 17941 26437 45721 66284 14 1462 2399 3762 6140 8787 13648 17180 20704 30509 52764 76494 16 1658 2719 4264 6959 9960 15470 19473 23468 34581 59807 86705 18 1853 3039 4766 7779 11133 17292 21766 26231 38654 66850 96915 20 2048 3359 5269 8599 12306 19113 24059 28995 42726 73893 107126 20.7 2116 3471 5444 8885 12716 19751 24862 29962 44152 76358 110699 G H J K L M N P Q
4.7 20
For sizing using current areas (ASME), the discharge coefficient K for steam is 0.853.
TI-P710-01 CTLS Issue 1
Page 6 of 13
SV44H Carbon Steel Safety Valve
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