泵吸入管路底部应安装截止止回阀，确保其操作灵活。
Check valve should be installed in the bottom of suction pipe of pump to make sure operation is prompt.
吸入管路截面积必须大于或等于泵流道断面积。
The sectional area of the suction pipeline is no less than pump flowing channel's.
并保证泵在工作时，不超过其允许汽蚀余量。4、吸入和排出管路应该有支架。
And ensure the pump at work, no more than the allowed NPSH. 4, suction and discharge line should be a support.
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