Vacuum Pumps

What are they?

Vacuum pumps are used to pull air, gas, or water out of an area in order to produce a partial vacuum. There are several types available and they are categorized based on the completeness of the vacuums they create. Ultrahigh- and high-vacuum pumps create almost total vacuums, while the more basic medium- and low-vacuum pumps create vacuums that are less complete.

How do they work?

These pumps are also categorized based on how they work. First, there are entrapment pumps, which trap gases, condense them into a solid state, and use electrical fields to remove them from the vacuum. These are the most effective pumps for creating ultrahigh vacuums. Second, there are momentum pumps, which use the force of high-speed mechanisms to expel molecules and create a high vacuum. Third, there are positive displacement pumps, which include diaphragm pumps, pistons pumps, or any other type of pump to expand the volume of an airtight chamber and thus create a low vacuum.

Where are they used?

Vacuum pumps are versatile instruments with an extremely wide variety of uses. They’re used to create the vacuums inside of manufactured items such as light bulbs, flight instruments, and semiconductors; they’re used in various medical applications, including radiotherapy and procedures that call for suction; and they’re employed in a range of industrial and scientific uses, including vacuum engineering, electron microscopy, mass spectrometers, and composite plastic molding.

Expert Advice

Incorrectly installed suction and discharge piping can create stresses on the pump casing and thus reducing the reliability of the seal and bearings. Read tips on how to eliminate this occurance.

J. Hamilton Wright shows us some of the benefits that self-priming, centrifugal pumps can offer in industrial plants.

Who said that pump problem solving is difficult. Pump guru Ross Mackay provides a practical approach to pump reliability.

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Industry Updates

Switch to: Expert Advice | Pump Tweets

Just in time for boating season, Wastecorp Pumps recently debuted a new pump product line designed for marine sanitation and bilge pumping.

Frost & Sullivan recently recognized German pump manufacturer NETZSCH with is 2011 Global Award for Customer Value Enhancement. The company earned the accolades for its customer focus and dedication to innovation, according to the Frost & Sullivan news release.

The world's drinking water plants will spend just under $6 billion this year for pumps, according to a new report from the Mcilvaine Company.

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Pump Tweets

WEF has awarded ITT Corporation's Water and Wastewater group the 2011 Innovative Technology Award. ITT Water & Wastewater - Flygt Products was awarded in the category of "collection systems", for Flygt's patented N-pump. The N-pump features a clog-resistant design and is equipped with the newly-designed Adaptive Impeller functionality.

KSB introduces immersion variant of high-pressure pump. The new pump, called Movitec VCl, is a vertical, multistage centrifugal pump that can be used for handling coolants, condensate and lubricants for machine tools. The pump has a max flow rate of 27 m3/hr and the maximum discharge head is 250 m.

Colfax introduces an online energy savings calculator for oil and gas industry pump applications. The calculator allows head-to-head comparisons between centrifugal pumps and rotary positive displacement pumps in both single and multiple pump applications. Check it out at the Colfax website.

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