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What determines number of stages of the progressing cavity pumps?

Question 3: What determines number of stages of the progressing cavity pumps?

Answer:   
              Number of stages depends on several factors, with the main one is total differential pressure. Typically, a stage is added for each 75-100 psi. For example, a 300 psi differential would require 4-5 stages. Manufacturers catalog provides different curves for different stage number designs.

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