May 2013

Special Report: Maintenance/Reliability

Avoid hidden costs of suction-specific speed in pumping

More than 30 years ago, a landmark study observed a relationship between suction-specific speed and the probability of pump failure that changed the way pumps are selected. This observation created th..

Bailey, J., Bradshaw, S., ITT Goulds Pumps

More than 30 years ago, a landmark study observed a relationship between suction-specific speed and the probability of pump failure that changed the way pumps are selected. This observation created the common perception that a lower suction-specific speed value equals higher pump reliability, with a value below 11,000 established as a common benchmark for good reliability. This perception has remained relatively unchanged, even though pump design and manufacturing methods have advanced significantly. Pump purchasers continue to rely on a specification limit that derives from one study conducted by one company several years ago. If purchasers order the wrong design or more pump than is neede

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