Understanding Corrosion in Water Pipelines: A Guide for Pipeline Designers



Last updated: August 2, 2018

What Does Pump Mean?

A pump is a mechanical device used to force a fluid (a liquid or a gas) to move forward inside a pipeline or hose. They are also used to produce pressure by the creation of a suction (partial vacuum), which causes the fluid to rise to a higher altitude.


Corrosionpedia Explains Pump

There are various types of pumps, including:

  1. Positive displacement pumps – Also known as a constant flow machine because the volume of fluid being displaced remains constant in each operation cycle of the pump. This means that the flow of fluid produced by this type of pump at a given speed (rpm) will be same regardless of the discharge pressure. These pumps are further divided into:
    1. Rotary positive displacement pumps or rotary pumps. They include gear pumps, screw pumps and rotary vane pumps.
    2. Reciprocating positive displacement pumps or reciprocating pumps. They include plunger pumps, diaphragm pumps, piston pumps and radial piston pumps.

2. Velocity pumps – These pumps increase the velocity of the fluid they are pumping, and are further divided into axial flow pumps, radial flow pumps and mixed flow pumps.


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