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Liquid Ring Vacuum Pumps

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When atmosphere has been removed from an enclosure, the area within the enclosure is called a vacuum. A complete vacuum is a space devoid of pressure. In practice, it is impossible to create a complete vacuum. Read More…

Liquid Ring Vacuum Pumps Liquid ring vacuum pumps are vacuum pump systems that make use of a liquid seal to maintain the negative pressure of a vacuum. Vacuum pumps are devices that remove atmosphere from an enclosure.
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Leading Manufacturers

Tarpon Springs, FL  |  727-944-3337

Here at Vac Cubes we manufacture high quality compressed-air vacuum generators, vacuum cups and accessories. We offer solutions for a full range of applications and industries including: labeling, leak detectors, filtration, carton erecting, stacking, laminating, molding, thermoforming, vacuum bagging, and much more.

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Vac Cubes $$$

Methuen, MA  |  978-686-7550

Founded in 1952, this international corporation designs, manufactures & markets a variety of precision made equipment. Additional products include dry, scroll & diaphragm, turbomolecular, oil diffusion, mechanical booster, getter & sorption & ion components & much more. Please check out ULVAC’s website for complete product descriptions.

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ULVAC Technologies, Inc. $$$

Skokie, IL  |  847-676-8800

Welch Vacuum specializes in rotary vane vacuum pumps, liquid ring vacuum pumps, oilless vacuum pumps, diaphragm vacuum pumps, linear vacuum pumps and miniature vacuum pumps. We have provided quality vacuum pumps for a wide range of applications and markets for many years.

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Welch® Vacuum $$$

Anaheim, CA  |  800-747-2821

A-VAC Industries is a vacuum pump supplier featuring new and rebuilt high vacuum pumps, rotary vane vacuum pumps and accessories from Alcatel, Welch and more. We offer a factory-trained service department and provide high quality service backed by a one-year warranty.

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A-VAC Industries $$$

South Easton, MA  |  508-230-9445

GlobalVac was founded in 1994 and is a leading supplier and packager of medical, lab and industrial vacuum systems. We specialize in rotary dry claw, liquid ring, rotary vane and rotary screw technology. Call us today for innovative solutions to all of your pumping needs! Globalvac is a division of Air Energy.

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GlobalVac $$$
placeholder image Vac Cubes ULVAC Technologies, Inc. Welch® Vacuum A-VAC Industries GlobalVac

No machinery can completely remove atmospheric pressure from a space, but different vacuums can create varying levels of low atmospheric pressure depending on their construction. Liquid ring vacuum pumps are not the most powerful vacuum pump systems, but they are effective and reliable.

They are used in many industrial processes including the vacuum forming of products like egg cartons and other forms of packaging. They can also be used in more complex industrial applications like soil remediation (the collection of contaminated groundwater) and petroleum refining.

Liquid Ring Vacuum Pumps Liquid Ring Vacuum Pumps - Busch LLC

Vapor recovery processes, which involve the reuptake of vapors created or released by an industrial process, are often accomplished with the use of a liquid ring vacuum pump. Liquid ring vacuum pumps are made up of a circular enclosure, a rotating vane with paddles, a set volume of liquid and openings for intake and outlet of gas from the vacuum enclosure.

The liquid in a liquid ring vacuum is often water, but it can also be oil or another liquid. Depending on the properties of the gas being evacuated, water or oil may not be appropriate because of reactivity concerns. Regardless of whatever liquid is used, the process by which liquid vacuum pumps create a vacuum is always the same.

The spinning of the rotating vane causes the liquid to form a ring around the outside of the circular enclosure. This creates an air-tight seal and individual compression chambers between each of the vane's paddles, all of which are partially submerged in the liquid at all times.

As the vane spins, it draws air through its inlet, compresses it and forces it through the outlet. The expelled atmosphere cannot rush back in through the pump because of the liquid seal.

Liquid Ring Vacuum Pumps Informational Video