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The material and processing principle of multistage pump body and the distinction between pump shell and pump body
- Nov 20, 2017 -


1. The position of the multistage pump body in the multistage pump
Multistage pump body is a part of multistage pump. The multistage pump is mainly composed of water inlet section, outlet section, middle section, tail cover, impeller, pump body, pump shaft, bearing, sealing ring and stuffing box. Its position in the multistage pump is very important and pivotal, so it can not be ignored.

2. Structure and material of the multistage pump body

The top of the pump body of the multistage pump is provided with an exhaust hole or an irrigation hole, which is mainly used for pumping vacuum or irrigation. It also has a water discharge hole at the bottom of the pump body, if not to water, then it is bolted. It is used to vent the accumulated water in the body after the pump stops, in order to prevent internal corrosion and the freezing problem at low temperature.

The materials of the multistage pump body, generally speaking, is cast iron and cast steel. In addition, if necessary, it can also be some other materials.

3. The processing principle of multistage pump body and the distinction between pump shell and pump body
There some specific principles of the processing technology of multistage pump body:
Principle 1: “First surface later hole”, namely first process the plane and then process the hole.
Principle 2: “Separate rough and fine, first rough finish later fine finish”, namely first do the rough finish and then do the fine finish.
The pump body and the pump shell are different, so the multistage pump body and the pump shell can not be confused. The pump shell is a part of the pump body, is the accessory of the pump body, so in the range, the pump body is much larger than the pump shell.


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