The operation of a cast iron multistage pump is fairly straightforward but involves a multi-stage process that increases the pressure of the liquid being transported. The pump consists of several impellers, each placed in a stage that contributes to a gradual increase in pressure. As fluid enters the first stage, it is pushed through the impeller, which increases its velocity. As it moves to the next stage, the pressure increases further, ensuring a higher pressure output after each stage.

In a typical setup, the pump draws fluid from a source and passes it through the stages, with each impeller pushing the fluid at a higher pressure level. The result is a significant increase in pressure, which is essential for applications such as high-rise water supply, irrigation, and industrial fluid processing.

One advantage of multistage pumps is that they can be customized to meet specific needs. For example, the number of stages and the size of the impellers can be adjusted based on the required pressure levels, making these pumps versatile and adaptable to various requirements.