当压降比s小于1时，
流量特性发生畸变，因此
调节阀同样开度下的流量值发生变化。
表3-6和表3-7分别是线性流量特性和等百分比流量特性时，不同压降比下相对流量与相对行程的关系表。
表3-6线性流量特性
控制阀在不同压降比下相对流量与相对行程的关系
|
0.05 |
0.10 |
0.15 |
0.2 |
0.25 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
| 10% |
0.7569 |
0.8680 |
0.9126 |
0.9367 |
0.9517 |
0.9621 |
0.9753 |
0.9834 |
0.9889 |
0.9928 |
0.9958 |
0.9981 |
1.0000 |
| 20% |
0.5060 |
0.6838 |
0.7745 |
0.8295 |
0.8665 |
0.8930 |
0.9284 |
0.9511 |
0.9669 |
0.9785 |
0.9873 |
0.9943 |
1.0000 |
| 30% |
0.3349 |
0.5152 |
0.6280 |
0.7051 |
0.7612 |
0.8039 |
0.8644 |
0.9054 |
0.9348 |
0.9571 |
0.9745 |
0.9885 |
1.0000 |
| 40% |
0.2298 |
0.3865 |
0.5001 |
0.5863 |
0.6539 |
0.7084 |
0.7908 |
0.8501 |
0.8948 |
0.9297 |
0.9578 |
0.9808 |
1.0000 |
| 50% |
0.1647 |
0.2939 |
0.3980 |
0.4836 |
0.5553 |
0.6162 |
0.7141 |
0.7893 |
0.8489 |
0.8973 |
0.9374 |
0.9712 |
1.0000 |
| 60% |
0.1227 |
0.2280 |
0.3193 |
0.3992 |
0.4698 |
0.5326 |
0.6393 |
0.7267 |
0.7995 |
0.8612 |
0.9140 |
0.9599 |
1.0000 |
| 70% |
0.0945 |
0.1806 |
0.2593 |
0.3315 |
0.3980 |
0.4595 |
0.5694 |
0.6648 |
0.7485 |
0.8223 |
0.8881 |
0.9470 |
1.0000 |
| 80% |
0.0748 |
0.1458 |
0.2133 |
0.2776 |
0.3387 |
0.3971 |
0.5061 |
0.6058 |
0.6974 |
0.7819 |
0.8601 |
0.9326 |
1.0000 |
| 90% |
0.0606 |
0.1198 |
0.1778 |
0.2345 |
0.2900 |
0.3443 |
0.4496 |
0.5507 |
0.6477 |
0.7409 |
0.8306 |
0.9169 |
1.0000 |
| 100% |
0.0500 |
0.1000 |
0.1500 |
0.2000 |
0.2500 |
0.3000 |
0.4000 |
0.5000 |
0.6000 |
0.7000 |
0.8000 |
0.9000 |
1.0000 |
表3-7 等百分比流量特性控制阀在不同压降比下相对流量与相对行程的关系
|
0.05 |
0.10 |
0.15 |
0.2 |
0.25 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1.0 |
| 10% |
0.9600 |
0.9806 |
0.9877 |
0.9913 |
0.9935 |
0.9949 |
0.9967 |
0.9978 |
0.9985 |
0.9991 |
0.9995 |
0.9998 |
1.0000 |
| 20% |
0.9240 |
0.9625 |
0.9760 |
0.9830 |
0.9872 |
0.9900 |
0.9935 |
0.9957 |
0.9971 |
0.9981 |
0.9989 |
0.9995 |
1.0000 |
| 30% |
0.8602 |
0.9285 |
0.9538 |
0.9669 |
0.9750 |
0.9804 |
0.9873 |
0.9915 |
0.9943 |
0.9963 |
0.9979 |
0.9991 |
1.0000 |
| 40% |
0.7571 |
0.8681 |
0.9127 |
0.9367 |
0.9518 |
0.9621 |
0.9753 |
0.9834 |
0.9889 |
0.9928 |
0.9958 |
0.9981 |
1.0000 |
| 50% |
0.6122 |
0.7692 |
0.8411 |
0.8824 |
0.9091 |
0.9278 |
0.9524 |
0.9677 |
0.9783 |
0.9859 |
0.9917 |
0.9963 |
1.0000 |
| 60% |
0.4444 |
0.6280 |
0.7284 |
0.7916 |
0.8351 |
0.8669 |
0.9102 |
0.9383 |
0.9580 |
0.9726 |
0.9838 |
0.9927 |
1.0000 |
| 70% |
0.2883 |
0.4610 |
0.5759 |
0.6580 |
0.7195 |
0.7674 |
0.8369 |
0.8850 |
0.9203 |
0.9473 |
0.9685 |
0.9858 |
1.0000 |
| 80% |
0.1702 |
0.3022 |
0.4075 |
0.4935 |
0.5651 |
0.6256 |
0.7221 |
0.7958 |
0.8540 |
0.9009 |
0.9397 |
0.9723 |
1.0000 |
| 90% |
0.0941 |
0.1799 |
0.2584 |
0.3305 |
0.3969 |
0.4583 |
0.5683 |
0.6638 |
0.7464 |
0.8216 |
0.8876 |
0.9467 |
1.0000 |
| 100% |
0.0500 |
0.1000 |
0.1500 |
0.2000 |
0.2500 |
0.3000 |
0.4000 |
0.5000 |
0.6000 |
0.7000 |
0.8000 |
0.9000 |
1.0000 |
