A liquid filters through a strainer,into the receptacle beneath.

液体滤器入下器。

When  heavy  dirt  and  sludge  accumulate  on  the suction strainer, the pump soon begins to cavitate.

但由于粗滤器是装在油箱内部，所以粗滤器维护常常被忽视。

A strainer is recommended to be installed ahead of the backflow preventer to prevent the fouling of the check assembly and resulting spillage from the valve during repressurization.

建议在防回阀前安装一个滤器，防止由于止回阀总成受到污染而导致这种阀门在再增压期间产生泄漏或溢出。