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Peristaltic pumps can provide ideal pumping solutions for many applications, particularly those dealing with materials that are abrasive, corrosive or viscous. They can be used to pump a variety of materials from clean/sterile fluids to highly aggressive fluids.

Slurry pumps have the difficult tasks of resisting wear while passing large particles and rocks, preventing air derating when pumping froth and foam, and remaining easy to maintain. This balancing act makes the slurry pump less efficient than its clean and gray water counterparts.

During the past few years, end users in the power generation industry have considered specifying pumps according to American Petroleum Institute (API) standards.

Investments are rampant in the power generation sector as demand for electricity grows in both industrial and residential segments. Many countries invest considerable time and money to expand the energy source mix and discover cleaner technologies.

As the use of variable speed drives with centrifugal pumps increases, pump users are more commonly operating pumps at higher speeds than their original design intended. Higher speeds correspond directly with increases in head and capacity. These higher pressures and a lack of asbestos gasket material can cause sealing reliability issues for some older split case pumps.

As the use of variable speed drives with centrifugal pumps increases, pump users are more commonly operating pumps at higher speeds than their original design intended. Higher speeds correspond directly with increases in head and capacity. These higher pressures and a lack of asbestos gasket material can cause sealing reliability issues for some older split case pumps.

Power generation plants face difficulty when conserving water, regardless of size or fuel source. For wet cooling in particular, efficiency of the cooling tower and a typical 5 percent evaporation rate mean thousands of gallons of water evaporate per day. The total cost of water loss increases when considering the water source and disposal costs.

Nearly every commercial and industrial facility in the world pumps water. Pumping cold, lubricating water is normally straightforward and only requires standard materials seals and lower-pressure components. However, as water is heated, its properties drastically change, and the pump specifications should change as well.

Manufacturing and other plant operators—such as those who work in wastewater, water treatment and power generation—face the daily challenge of maintaining efficient operations. Manufacturing is the most energy-consuming market in the U.S. Recent data indicate a trend toward increasing energy prices for manufacturing processes. As the U.S.

The Jordan, Knauff & Company (JKC) Valve Stock Index was up 0.9 percent during the last 12 months, much lower than the broader S&P 500 Index, which was up 16.3 percent. The JKC Pump Stock Index was up 7.3 percent for the same time period.1

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Columns

In my last column (Pumps & Systems, October 2014), I explained that a capacitor’s current is totally out of phase with that of a motor’s magnetizing current.

I received a lot of feedback on my column “How Much Energy Do Pipes Remove?” in the September issue of Pumps & Systems.

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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For nearly 22 years, Pumps & Systems has been the leading technical magazine for pump users worldwide, delivering the most comprehensive pumping information across all the process industries.

For nearly 22 years, Pumps & Systems has been the leading technical magazine for pump users worldwide, delivering the most comprehensive pumping information across all the process industries.

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