两个阶段配备了提升螺钉盖（盖，体通用）和测压口：其余与单级相同。只有泵盖、泵体和下方导叶组成两个工作间，其中第一级叶轮分别由硅黄铜80-3和叶轮铸铁ht20-40cuo制成
The two stages are equipped with lifting screw cover (cover, common to the body) and pressure tap: the rest are the same as the single stage. Only the pump cover, the pump body and the lower guide vane form two workshops, in which the first stage impeller is made of silicon brass 80-3 and impeller cast iron ht20-40cuo respectively
Single stage with inducer: the rest are the same as the single stage. Only the impeller is made of aluminum iron bronze 9-4. An inducer made of aluminum iron bronze 9-4 is added behind the impeller to improve the cavitation performance
Causes of overheating of condensate pump bearings
1。 There is no grease or insufficient grease in the pump
Method: add lubricating grease to meet the standard requirements
2。 The pump and motor shafts are not concentric
Method: align and align the pump and motor concentric
3。 Pump bearing damaged
Method: replace the bearing with a new one
