Abstract
This chapter explains the different sources of internal wear and offers suggestions to avoid the internal wear and extend the useful running time of a pump. The sources that are discussed in detail in the chapter are erosion, corrosion, wear rings, fluid velocity, turbulence, and throttling. Erosion is the wear of the pump internal parts by suspended solid particles contained in the fluid being pumped such as well water, industrial effluent, raw water, boiler feed water, condensate water. Corrosion is caused by the chemical or electrochemical attack on the surface of the metals. Wear rings are provided for a close running and these are worn once fluid being pumped lubricates with it. High fluid velocities will wear pump parts much faster than desirable as it is mentioned in the affinity laws. The uneven wear in the pump parts is because of turbulence. The objective of the chapter enlightens the reader regarding the different sources of pump wear and steps to avoid them.
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