Volute, Pump, Block, Block motor, impeller nut is cast iron, good corrosion resistance, easy processing.

蜗壳、泵座、电机座、叶轮螺母是生铁铸造、耐腐化性较好，加工工艺方便。

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The impeller is static balanced, and it is fixed with sleeve and nuts aside, its axial position can be adjusted by sleeve nut.

叶轮经过静平衡校验，用轴套和两侧的轴套螺母固定，其轴向位置可以通过轴套螺母进行调整。

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