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Q. What are some differences between specific speed and suction specific speed for a rotodynamic pump?

In the previous article calculating the cost of elements in a piping system (Pumps & Systems, July 2014), the energy consumed and power cost balanced exactly to demonstrate the proces

Head-to-head comparisons show decreased compressed air use and enhanced flow.

In my July 2014 column, I demonstrated that three-phase voltage variation can significantly affect several alternating curre

Design of the pump inlet piping can protect overall operation.
Abrasive processing and wide temperature range are some of the pumping difficulties for high-performance liquid chromatography.
The computational fluid dynamics process advances highly efficient pump designs for difficult applications.

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The global water crisis claims 5,500 lives each day—more than war, natural disasters, AIDS or hunger. It is a sobering problem but not an impossible one to solve.

Savanna Lauderale

SKF hosted their annual Technical Press Day on June 9, 2014, at Penske Headquarters in Mooresville, North Carolina. This was my first event to cover for Pumps & Systems, so I had a lot to learn! Here are a just a few of the things I picked up at press day.

Columns

In my July 2014 column, I demonstrated that three-phase voltage variation can significantly affect several alternating current (AC) motor characteristics. If that variation is large, it can also reduce motor life.

When the pump selection process starts, the required flow of the is often the only known variable for an application. For example, a system must move 2,000 gallons per minute (gpm) from a holding tank to another tank or process.

A reciprocating power pump, as depicted in Figure 1, is a displacement machine. It has characteristics that are different than a centrifugal pump.

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