This design is used mainly for vertical pump systems equipped with pump wells.

这种设计主要用于配有泵池的立式泵系统。

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Different form appearance, vertical pump is standing and horizontal pump is lying.

外观形式不同，立式三螺杆泵是立着的而卧式泵是横卧着。

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Maintenance difficulty is different, vertical pump maintenance is difficult, such as repair impeller should be the upper can all move to the rear;

维修难度不同 ， 立式三螺杆泵检修难度大 ， 如检修叶轮需将上部全部移去后方能进行 ；

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