What are the classifications of centrifugal pumps

There are many classification methods of centrifugal pump, which are divided according to different structural characteristics.
1、 According to the number of working impeller to classify 1, single-stage pump: that is, there is only one impeller on the pump shaft.
2. Multistage pump: that is, there are two or more impellers on the pump shaft. At this time, the total head of the pump is the sum of the heads generated by N impellers.
2、 According to the working pressure, 1. Low pressure pump: the pressure is lower than 100 m water column; 2. Medium pressure pump: the pressure is between 100-650 m water column; P 1-6.5mpa3. High pressure pump: the pressure is higher than 650 m water column.
P> 6.5MPa 3. Classification according to impeller water inlet mode 1. Single side water inlet pump: also called single suction pump, i.e. there is only one water inlet on the impeller; 2. Double side water inlet pump: also called double suction pump, i.e. there is one water inlet on both sides of the impeller.
Its flow rate is twice that of single suction pump, which can be approximately regarded as two single suction pump impellers put together back to back.
4、 According to the combination joint form of pump shell, 1. Horizontal split type pump: that is, there is a combination joint on the horizontal plane passing through the axis line.
2. Vertical joint surface pump: that is, the joint surface is perpendicular to the axis line.
5、 According to the position of pump shaft, 1. Horizontal pump: the pump shaft is in the horizontal position.
2. Vertical pump: the pump shaft is in the vertical position.
6、 According to the way that the water from the impeller leads to the press out chamber, 1. Volute pump: after the water comes out of the impeller, it directly enters the pump shell with spiral shape.
2. Guide vane pump: after water comes out of the impeller, it enters the guide vane set outside it, and then enters the next stage or into the outlet pipe.
Usually we say that a certain water pump belongs to a multistage pump, which refers to the impeller.
According to other structural features, it may be horizontal pump, vertical combination surface pump, guide vane pump, high-pressure pump, single side water inlet pump, etc.
So according to different, the name is different.
In addition, it can also be classified according to the use, such as oil pump, water pump, condensate pump, ash discharge pump, circulating water pump, etc.