SIZING CONTROL VALVES

COMPRESSIBILITY CHART
SIZING CONTROL VALVES
Z is a function of reduced pressure and temperature

COMPRESSIBILITY FACTOR
Tr Pr → 0.01 0.05 0.1 0.2 0.4 0.6 0.8 1 1.2 1.5 2 3 5 7 10
↓ P1
0.3 0.0029 0.0145 0.029 0.0579 0.1158 0.1737 0.2315 0.2893 0.347 0.4336 0.5776 0.8649 1.4368 2.0051 2.8511 Pr =
0.35
0.4
0.0026
0.0024
0.013
0.0119
0.0261
0.0239
0.0522
0.0477
0.1043
0.0954
0.1564
0.1429
0.2084
0.1905
0.2604
0.2379
0.3123
0.2853
0.3901
0.3564
0.5196
0.4744
0.776
0.7095
1.2303
1.1759
1.7988
1.6374
2.5542
2.3213
Pc
0.45 0.0022 0.011 0.0221 0.0442 0.0882 0.1322 0.1762 0.2201 0.2639 0.3295 0.4384 0.6552 1.0842 1.5078 2.134
0.5 0.0021 0.0103 0.0207 0.0413 0.0825 0.1236 0.1647 0.2056 0.2465 0.3077 0.4093 0.611 1.0094 1.4018 1.9802 T1
0.55 0.9804 0.0098 0.0195 0.039 0.0778 0.1166 0.1553 0.1939 0.2323 0.2899 0.3854 0.5747 0.9476 1.3137 1.8521 Tr =
0.6
0.65
0.9849
0.9881
0.0093
0.9377
0.0186
0.0178
0.0371
0.0356
0.0741
0.071
0.1109
0.1063
0.1476
0.1415
0.1843
0.1765
0.2208
0.2113
0.2753
0.2634
0.3657
0.3495
0.5446
0.5197
0.896
0.8526
1.2399
1.1773
1.744
1.652
Tc
0.7 0.9904 0.9504 0.0172 0.0344 0.0687 0.1027 0.1366 0.1703 0.20038 0.2538 0.33647 0.4991 0.8161 1.1241 1.573
0.75 0.9922 0.9598 0.9165 0.0336 0.067 0.1001 0.133 0.1656 0.1981 0.2464 0.326 0.4823 0.7854 1.0787 1.5048
0.8 0.9935 0.9669 0.9319 0.8539 0.0661 0.0985 0.1307 0.1626 0.1942 0.2411 0.3183 0.469 0.7598 1.04 1.4457
0.85 0.9946 0.9725 0.9436 0.881 0.0661 0.0984 0.1301 0.1614 0.1924 0.2382 0.3132 0.4591 0.7388 1.0071 1.3944
0.9 0.9954 0.9768 0.9528 0.9015 0.78 0.1006 0.1321 0.163 0.1935 0.2383 0.3114 0.4527 0.722 0.9793 1.3497 More data are available in :
0.93 0.9959 0.979 0.9573 0.9115 0.8059 0.6636 0.1359 0.1664 0.1964 0.2405 0.3123 0.4507 0.7139 0.9649 1.3258
0.95 0.9961 0.9803 0.96 0.9174 0.8207 0.6968 0.14 0.1705 0.1999 0.2432 0.3138 0.4502 0.7093 0.9561 1.3109
0.97 0.9963 0.9815 0.9625 0.9228 0.8338 0.724 0.5582 0.178 0.2055 0.2474 0.3165 0.4504 0.7053 0.9481 1.2969
0.98 0.9965 0.9821 0.9637 0.9253 0.8398 0.736 0.5888 0.1844 0.2097 0.2503 0.3182 0.4508 0.7035 0.9443 1.2901
0.99 0.9966 0.9826 0.9648 0.9277 0.8455 0.7471 0.6139 0.1961 0.2155 0.2539 0.3204 0.4514 0.7019 0.9407 1.2836
1,00 0.9967 0.9832 0.9659 0.93 0.8509 0.7575 0.6354 0.321 0.2238 0.2584 0.323 0.4523 0.7005 0.9372 1.2773
1.01 0.9968 0.9837 0.9669 0.9322 0.8561 0.7671 0.6542 0.4652 0.2372 0.2641 0.3261 0.4534 0.6992 0.9339 1.2711
1.02 0.9969 0.9842 0.9679 0.9343 0.861 0.7762 0.6711 0.5148 0.2632 0.2715 0.3297 0.4547 0.6981 0.9308 1.2651
1.05 0.9971 0.9855 0.9707 0.9401 0.8744 0.8802 0.7131 0.6027 0.4441 0.3133 0.3453 0.4605 0.6957 0.9223 1.2482
1.1 0.9975 0.9874 0.9747 0.9485 0.893 0.8324 0.7649 0.688 0.5986 0.4583 0.3955 0.4771 0.6951 0.911 1.2233
1.15 0.9978 0.9891 0.978 0.9554 0.9081 0.8576 0.8032 0.7443 0.6804 0.5799 0.4763 0.5044 0.6988 0.9034 1.2022
1.2 0.9981 0.9904 0.9808 0.9611 0.9205 0.8779 0.833 0.7858 0.7364 0.6606 0.5607 0.5427 0.7071 0.8991 1.1845
1.3 0.9985 0.9926 0.9852 0.9702 0.9396 0.9083 0.8764 0.8439 0.8111 0.7625 0.691 0.6347 0.7359 0.9 1.1581
1.4 0.9988 0.9942 0.9884 0.9768 0.9534 0.9298 0.9063 0.8827 0.8595 0.8257 0.7754 0.7204 0.7764 0.9114 1.142
1.5 0.9991 0.9954 0.9909 0.9818 0.9636 0.9456 0.9278 0.9104 0.8933 0.8689 0.8328 0.7888 0.8203 0.9299 1.1341
1.6 0.9993 0.9964 0.9928 0.9856 0.9714 0.9575 0.944 0.9308 0.9181 0.9001 0.8739 0.8411 0.8619 0.952 1.1322
1.7 0.9994 0.9971 0.9943 0.9886 0.9775 0.9667 0.9563 0.9463 0.9367 0.9234 0.9043 0.881 0.8986 0.9748 1.1345
1.8 0.9995 0.9977 0.9955 0.991 0.9823 0.9739 0.9659 0.9583 0.9511 0.9413 0.9276 0.9118 0.9298 0.9963 1.1394
1.9 0.9996 0.9982 0.9964 0.9929 0.9861 0.9796 0.9735 0.9678 0.9624 0.9553 0.9456 0.936 0.9558 1.0159 1.1454
2,00 0.9997 0.9986 0.9972 0.9944 0.9892 0.9842 0.9796 0.9754 0.9715 0.9664 0.9599 0.9551 0.9773 1.033 1.1518 FLOW OF FLUIDS THE CHEMICAL ENGINEER'S
2.2 0.9998 0.9992 0.9983 0.9967 0.9937 0.991 0.9886 0.9865 0.8747 0.9826 0.9806 0.9828 1.0095 1.0602 1.1637 THROUGH PIPE, FITTINGS AND VALVES
EXCEL WORKBOOK REFERENCE FOLDER
2.4 0.9999 0.9996 0.9991 0.9983 0.9969 0.9957 0.9948 0.9941 0.9936 0.9935 0.9945 1.0012 1.0314 1.0795 1.173
2.6 1,0000 0.9998 0.9997 0.9994 0.9991 0.999 0.999 0.9993 0.9998 1.001 1.004 1.0137 1.0463 1.0928 1.1794
2.8 1,0000 1,0000 1.0001 1.0002 1.0007 1.0013 1.0021 1.0031 1.0042 1.0063 1.0106 1.0224 1.0565 1.1017 1.1832
3,00 1,0000 1.0002 1.0004 1.0008 1.0018 1.003 1.0043 1.0058 1.0074 1.101 1.0154 1.0285 1.0635 1.1076 1.185
3.5 1.0001 1.0004 1.0008 1.0017 1.0035 1.0055 1.0075 1.0097 1.012 1.0156 1.0221 1.0369 1.0724 1.1139 1.1835
4,00 1.0001 1.0005 1.001 1.0021 1.0043 1.0066 1.009 1.0115 1.014 1.0179 1.0249 1.0401 1.0747 1.1137 1.1774