Pumps

Latest Pumps Articles

Rotary positive displacement (RPD) pumps theoretically displace a fixed amount of fluid per revolution. However, some loss in output is typically caused by the fluid slipping past the rotors. The difference between the quantity displaced (Qd) and the actual output quantity (Q) is slip (Sq).

Q. What principles drive the pumping action in a controlled-volume metering pump?

A. The pumping action is developed by a reciprocating piston. This reciprocating motion develops a flow profile represented by a sine wave. Actual rate of flow is determined by the following formula:

The Internet of Things (IoT) and Industry 4.0 have had a significant impact on the commercial world. People want everything connected so they can make smart decisions. For example, sensors around homes can communicate to thermostats to determine and adjust temperature.

The Jordan, Knauff & Company (JKC) Valve Stock Index was down 20.6 percent over the last 12 months, while the broader S&P 500 Index was up 9.6 percent. The JKC Pump Stock Index also decreased 18.4 percent for the same time period.1

The Pearl's Integrated District Cooling Plant (IDCP), owned and operated by the Qatar District Cooling Company, provides air-conditioning services to the Pearl of Qatar off the eastern coast of the peninsula.

In an effort to reduce reliance on fossil fuels, the Kingdom of Saudi Arabia will use renewable energy in water infrastructure as the country develops the world's first large-scale, solar-driven desalination plant.

Sewage treatment plants play a significant role in urban expansion. In the coming years, effluent will become an essential source of water for municipal use. Population growth, increasing living standards in developing countries and migration into cities all contribute to water stress throughout the world.

More than 1 billion people live in arid regions with little to no access to freshwater. Two-thirds of Earth is covered in water, but 97 percent of this water is seawater. Land-based freshwater sources, from the developing world to more industrialized countries, have been nearly depleted as populations grow and demand increases.

Puralube Germany GmbH operates two refineries about 40 kilometers south of Leipzig, Germany, in the Zeitz industrial park. Each year, the two plants consume approximately 150,000 metric tons of used oil and produce about 90,000 metric tons of base oils and another 50,000 metric tons of other mineral oil products.

Puralube Germany GmbH operates two refineries about 40 kilometers south of Leipzig, Germany, in the Zeitz industrial park. Each year, the two plants consume approximately 150,000 metric tons of used oil and produce about 90,000 metric tons of base oils and another 50,000 metric tons of other mineral oil products.

Columns

A common myth in the industry is that new pumps are shipped ready to “plug and play.” Assuming their new equipment has arrived fully equipped to run, end users often start new pumps with no oil in the bearings—one of the most common pumping mistakes.

Lev Nelik answers a reader's question on thermodynamic sub-processes that are highly time dependent

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

Blogs

More than 6,500 kilometers separates Frankfurt, Germany, and Dubai, UAE. To the average traveler, this distance might sound intimidating.

Part one of two: This column discusses valves and fittings and evaluates how these devices affect the operation of piping systems.
Cahaba Media Group

See also:

Upstream Pumping

© Copyright Cahaba Media Group 2015. All Rights Reserved. Privacy Policy
X
Your Country
Yes! I also want product and service alerts from P&S's industry partners.