August 2010

Special Report: Fluid Flow and Rotating Equipment

Pump aftermarket offers solutions for abrasive services

Upgrades substantially increased MTBR

McPherson, S., Sulzer Pumps (US) Inc. Service Center Houston

The need to transport low-grade feed stocks containing varying amounts of abrasives such as catalyst and coke fines is part of the refining economic picture. Accordingly, abrasion and erosive wear can limit centrifugal pump component life. However, many other factors influence centrifugal pump life in an abrasive service: fluid velocity (a consequence of higher flow and pressure demands met by increased operating speeds and impeller diameters), curve fit, geometric design and material selection. Yet, in an aftermarket situation, geometric design and material selection are typically the only parameters that can be optimized due to time, cost and infrastructure constraints. Roadmap for incre

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