水环真空泵的水温对其性能影响较大,而水环真空泵的性能曲线均为在15℃的水温条件下测得,因此在实际选用水环真空泵时应对水环真空泵的抽气速率进行修正。

水环泵的实际抽速可根据Qt=Q15K,K=(P1-Pt)/(P1-P15)计算修正值,其中:
Qt-水温为t℃时的气量m3/min Q15-水温为15℃时的气量m3/min
P1-水环泵的吸入压力mmHg Pt-水温为t℃时的饱和蒸汽压力mmHg
P15-水温为15℃时的饱和蒸汽压力mmHg K-气量修正系数

水环真空泵在各种温度及吸入压力下的K值可参照下表

水温
吸入压力 mmHg
25 30 35 40 50 60 80 100 120 150 200 250 300 400 500 600 760
0 1.685 1.486 1.376 1.307 1.225 1.177 1.124 1.096 1.078 1.061 1.045 1.035 1.029 1.022 1.017 1.014 1.011
2 1.627 1.445 1.345 1.281 1.206 1.162 1.114 1.088 1.071 1.056 1.041 1.032 1.027 1.02 1.016 1.013 1.01
4 1.561 1.398 1.308 1.252 1.184 1.145 1.102 1.079 1.064 1.05 1.037 1.029 1.024 1.018 1.014 1.012 1.009
6 1.487 1.345 1.268 1.218 1.16 1.126 1.088 1.068 1.055 1.043 1.032 1.025 1.021 1.015 1.012 1.01 1.008
8 1.403 1.286 1.221 1.181 1.132 1.104 1.073 1.056 1.046 1.036 1.026 1.021 1.017 1.013 1.01 1.008 1.007
10 1.308 1.219 1.169 1.138 1.101 1.08 1.056 1.043 1.035 1.027 1.02 1.016 1.013 1.01 1.008 1.006 1.005
12 1.201 1.143 1.111 1.09 1.066 1.052 1.037 1.028 1.023 1.018 1.013 1.01 1.009 1.006 1.005 1.004 1.003
14 1.081 1.057 1.045 1.036 1.027 1.021 1.015 1.011 1.009 1.007 1.005 1.004 1.003 1.003 1.002 1.002 1.001
16 0.946 0.962 0.97 0.976 0.982 0.986 0.99 0.992 0.994 0.995 0.996 0.997 0.998 0.998 0.999 0.999 0.999
18 0.795 0.855 0.888 0.908 0.933 0.947 0.963 0.971 0.977 0.982 0.987 0.989 0.991 0.994 0.995 0.996 0.997
20 0.627 0.735 0.795 0.833 0.878 0.904 0.932 0.948 0.958 0.967 0.976 0.981 0.984 0.988 0.991 0.992 0.994
21 0.536 0.671 0.745 0.792 0.848 0.88 0.916 0.935 0.947 0.959 0.97 0.976 0.98 0.985 0.988 0.99 0.992
22 0.439 0.602 0.692 0.748 0.816 0.855 0.898 0.922 0.936 0.95 0.963 0.971 0.976 0.982 0.986 0.988 0.991
23 0.337 0.53 0.636 0.703 0.783 0.829 0.88 0.907 0.925 0.941 0.957 0.966 0.972 0.979 0.983 0.986 0.989
24 0.23 0.454 0.577 0.655 0.747 0.801 0.86 0.892 0.912 0.932 0.95 0.96 0.967 0.976 0.981 0.984 0.987
25 0.117 0.374 0.515 0.604 0.71 0.772 0.84 0.876 0.899 0.921 0.942 0.955 0.962 0.972 0.978 0.982 0.986
26 0 0.289 0.449 0.55 0.671 0.741 0.818 0.86 0.886 0.911 0.935 0.948 0.957 0.968 0.975 0.979 0.984
27 0.2 0.38 0.494 0.63 0.708 0.795 0.842 0.872 0.9 0.926 0.942 0.952 0.964 0.972 0.977 0.982
28 0.106 0.308 0.435 0.587 0.674 0.771 0.824 0.857 0.888 0.918 0.935 0.946 0.96 0.968 0.974 0.979
29 0.008 0.231 0.372 0.541 0.638 0.746 0.804 0.841 0.876 0.909 0.928 0.941 0.956 0.965 0.971 0.977
30 0.151 0.307 0.493 0.601 0.719 0.784 0.824 0.863 0.899 0.921 0.934 0.951 0.961 0.968 0.975
31 0.066 0.238 0.443 0.561 0.692 0.762 0.807 0.849 0.889 0.913 0.928 0.946 0.957 0.965 0.972
32 0.166 0.39 0.519 0.662 0.74 0.788 0.835 0.879 0.904 0.921 0.941 0.953 0.961 0.97
33 0.089 0.334 0.475 0.631 0.716 0.769 0.819 0.868 0.896 0.914 0.936 0.949 0.958 0.967
34 0.01 0.276 0.429 0.599 0.691 0.749 0.804 0.856 0.886 0.906 0.93 0.945 0.954 0.964
35 0.215 0.381 0.565 0.665 0.727 0.787 0.844 0.877 0.898 0.925 0.94 0.95 0.961
36 0.15 0.33 0.53 0.637 0.705 0.77 0.831 0.867 0.89 0.918 0.935 0.946 0.958
38 0.012 0.221 0.453 0.579 0.657 0.732 0.804 0.845 0.872 0.905 0.925 0.937 0.951
40 0.102 0.369 0.514 0.605 0.691 0.774 0.821 0.852 0.891 0.913 0.928 0.943
42 0.277 0.443 0.547 0.646 0.74 0.795 0.831 0.875 0.9 0.917 0.935
45 0.122 0.324 0.45 0.57 0.685 0.751 0.795 0.848 0.879 0.9 0.921
50 0.086 0.257 0.419 0.574 0.664 0.723 0.794 0.836 0.864 0.893
55 0.018 0.233 0.438 0.556 0.634 0.728 0.784 0.821 0.859
60 0.004 0.27 0.424 0.524 0.647 0.72 0.767 0.817
70 -0.18 0.068 0.23 0.429 0.546 0.624 0.704
80 0.115 0.297 0.417 0.542
100 0