44
Control systems Safety valves
Capacity table - AIR - 10% Overpressure - Nm3/h (0ºC and 1.013 bar)
Set pressure (bar g)
Orifice Designation / Current Area (cm²)
F R 2.112 3.464 5.433 8.867 12.69 19.71 24.81 29.90 44.06 76.20 110.47 1.0 274 449 704 1149 1644 2553 3214 3873 5708 9871 14311 1.5 335 550 862 1407 2014 3128 3938 4746 6993 12095 17534 2.0 397 651 1021 1666 2384 3703 4662 5618 8279 14318 20757 2.5 464 761 1193 1947 2787 4328 5448 6566 9675 16732 24258 3.0 532 872 1367 2232 3194 4961 6244 7525 11089 19178 27803 3.5 599 983 1542 2516 3601 5593 7040 8485 12503 21624 31349 4.0 667 1094 1716 2801 4008 6226 7837 9444 13917 24069 34894 4.5 735 1205 1890 3085 4416 6858 8633 10404 15331 26515 38440 5.0 803 1317 2065 3370 4823 7491 9429 11364 16745 28960 41985 5.5 870 1428 2239 3655 5230 8124 10226 12323 18159 31406 45530 6.0 938 1539 2414 3939 5637 8756 11022 13283 19574 33852 49076 6.5 1006 1650 2588 4224 6045 9389 11818 14243 20988 36297 52621 7.0 1074 1761 2762 4508 6452 10021 12614 15202 22402 38743 56167 7.5 1142 1872 2937 4793 6859 10654 13411 16162 23816 41188 59712 8.0 1209 1984 3111 5077 7267 11286 14207 17121 25230 43634 63258 8.5 1277 2095 3285 5362 7674 11919 15003 18081 26644 46080 66803 9.0 1345 2206 3460 5647 8081 12552 15799 19041 28058 48525 70349 9.5 1413 2317 3634 5931 8488 13184 16596 20000 29472 50971 73894 10 1481 2428 3809 6216 8896 13817 17392 20960 30886 53416 77440 12 1752 2873 4506 7354 10525 16347 20577 24799 36543 63199 91622 14 2023 3318 5204 8492 12154 18877 23762 28637 42199 72981 105804 16 2294 3762 5901 9631 13783 21408 26947 32476 47855 82764 119986 18 2565 4207 6598 10769 15412 23938 30132 36314 53512 92546 134168 20 2836 4652 7296 11907 17041 26468 33317 40153 59168 102329 148350 20.7 2931 4807 7540 12306 17612 27354 34432 41496 61148 105752 153313 G H J K L M N P Q
4.7 24
For sizing using current areas (ASME), the discharge coefficient K for steam is 0.853.
TI-P710-01 CTLS Issue 1
Page 10 of 13
SV44H Carbon Steel Safety Valve
Powered by FlippingBook