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Classify according to the number of working impellers.
1. Single-stage pump: that is, there is only one impeller on the pump shaft.
2. Multi-stage pump: that is, there are two or more impellers on the pump shaft, and the total head of the pump is the sum of the heads produced by n impellers.
classify according to work pressure.
1. Low-pressure pump: the pressure is less than 100 meters water column.
2. Medium pressure pump: the pressure is between 100m and 650m water column.
3. High-pressure pump: the pressure is higher than 650m water column.
It is classified according to the water intake mode of the impeller.
1. Unilateral intake pump: also known as single suction pump, that is, there is only one inlet on the impeller.
2. Bilateral intake pump: also known as double suction pump, that is, there is a water inlet on both sides of the impeller. Its flow rate is twice as large as that of a single-suction pump, which can be approximately regarded as two single-suction pump impellers placed back-to-back together.
classify according to the joint joint form of the pump shell.
1. Horizontal open pump: that is, there is a joint seam 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.
Classify according to the position of the pump shaft.
1. Horizontal pump: the pump shaft is located in the horizontal position.
2. Vertical pump: the pump shaft is in the vertical position.
Classification according to the way the water from the impeller is directed to the extruding chamber.
1. Volute pump: after water comes out of the impeller, it goes directly into the pump shell with a helix 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 flows into the outlet pipe.
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