Wednesday, August 31, 2011
The Submersible Pumps Market in North America
The North American submersible pumps market is a mature market in an uncertain economic climate, especially in the United States. Suppliers face a number of key challenges: general economic malaise, a housing industry downturn that has dramatically affected various markets including construction, and the threat of eroded funding (which affects the largest user industry: water/wastewater) from federal, state and local budgets.
Tuesday, August 30, 2011
Newtonian and Non-Newtonian Fluids
How viscosity affects centrifugal pumps
The Hydraulic Institute published a standard to account for the effects of viscosity of centrifugal pump performance. Effects of Liquid Viscosity on Rotodynamic Centrifugal and Vertical Pump Performance—available at www.estore.pumps.org—was revised in 2010. Before this publication, viscosity corrections were done using viscosity correction charts.
Monday, August 29, 2011
Testing Centrifugal Pumps in the Field
The performance curves generated by many pump manufacturers are based on results obtained in their test facilities under tightly controlled conditions. The testing techniques used in the field can vary substantially and may or may not provide accurate results.
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