抽滤管 Aspirator (pump)
（重定向自Water aspirator）
抽滤管是实验室中常进行减压过滤、减压蒸馏以提供真空环境的重要角色。它是利用伯努力效应以高速的水流同过一在侧管设备了阀门的三向管所组合而成，以此方法产生工作环境所需要的负压。也有利用水帮浦所推动的循环水帮浦。最常应用的范围是在于有机实验是中的减压蒸馏、减压分馏等等。
Water aspirator
中文百科
英语百科
Aspirator (pump) 抽滤管
（重定向自Water aspirator）
An aspirator is a type of ejector-jet pump, that produces vacuum by means of the Venturi effect.
In an aspirator, fluid (liquid or gaseous) flows through a tube which narrows then expands in cross-sectional area, and thus volume. When the tube narrows the fluid's pressure decreases. In this narrow area the fluid velocity must increase to conserve mass continuity. Where the tube narrows a vacuum is drawn because of the Venturi effect.
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