注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。

Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.

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泵的额定压力是指泵连续工作时的最高许用压力，而其工作压力则决定于外部负载，泵的寿命与其工作压力直接相关。

The pump is rated pressure pump work for the highest allowable pressure, but their work is determined by external pressure load, pump life are directly related to their work pressure.

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防磨材料表面光滑作用减少了泵的负载。

In addition, the surface-smoothing effect of wearing material reduces pump load. Taking No.

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