July 2019

Valves, Pumps and Turbomachinery

Intensive study on damaged wear rings of centrifugal pumps—Part 1

This article is based on damaged wear rings from centrifugal pump applications.

This article is based on damaged wear rings from centrifugal pump applications. Two types of wear ring materials are analyzed in this article. For each material, there are two wear rings: the stationary (inner) wear ring and the rotating (outer) wear ring. The surfaces of the two different wear rings’ materials and their corresponding inner/outer ring will be scanned and evaluated to observe the type of wear that caused damage. It is important that a specific form of wear called galling is not present in the wear ring scans, according to the ASTM G98 standard. Galling occurs when the contact pressure is larger than the desired threshold pressure for a material. The surface damage can be ide

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