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Oilless Vacuum Pumps

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Oilless pumps are used in contexts in which accidental exposure to oil could damage products or endanger people. Medical vacuum pumps are often oilless to minimize patient and instrument exposure to oil. In the fabrication of hi-tech electronics, oilless pumps may also be necessary to avoid contaminating sensitive instruments with small amounts of oil. Read More…

Oilless Vacuum Pumps Oilless vacuum pumps are devices that create vacuums in enclosed spaces without the use of oil for lubrication, as a sealant or for any other purpose. Many varieties of oilless pumps are dry vacuum pumps, but some are not. Liquid ring pumps, for example, may make no use of oil, but they are not completely dry systems.
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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 $$$

Fridley, MN  |  800-893-4235

Annovi Reverberi (A.R. Pumps) manufactures a complete range of high-pressure pumps and accessories, as well as Mono-Block motor/pump combinations for the car wash market. We are A.R. Pumps, setting a new benchmark for quality, serviceability and cost effectiveness.

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AR North America $$$

Wausau, WI  |  715-845-7867

Stainless steel vacuum pumps are our specialty. Our liquid ring vacuum pumps come with packages, single or two-stage, for easy and quick installation. Lyco Wausau’s industrial vacuum pumps are used in the food, medical, pharmaceutical, chemical and industrial applications. Call us today!

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Lyco Wausau, Inc. $$$

Clifton, NJ  |  973-249-0854

A&J is a leading supplier of vacuum technology and integrated solutions for other technologies. As a global company, our line of products is extensive and includes wet/dry pumps, turbo pumps, diffusion pumps, vacuum valves, vacuum fittings, semiconductor pumps, industrial pumps, oil sealed pumps, chemical dry pumps, liquid ring pumps and more along with the necessary fluids and controls.

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A&J Vacuum Services, Inc. $$$

Raleigh. NC  |  919-713-0880

Schmalz is a manufacturer of vacuum pumps for a variety of industries and applications. As a vacuum pump supplier, we have provided many different companies with quality industrial vacuum pumps.

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Schmalz Inc. $$$
placeholder image Vac Cubes AR North America Lyco Wausau, Inc. A&J Vacuum Services, Inc. Schmalz Inc.

In industrial contexts, vacuum pumps are used for dry etching, solvent recovery, material handling, distilling, petrochemical processing, food manufacturing, finishing and many other processes. Oil-less dry pumps are generally less expensive than wet pumps because of lower initial investment and ongoing maintenance costs.

The cost of a dry vacuum pump failure can also be less than that of a wet pump failure, because oil or other liquid contamination of a vacuum enclosure can often be very damaging. However, oil allows for tighter seals between parts, which increases evacuation capacity. Because a dry vacuum pump cannot be sealed as well as an oil-sealed pump, their vacuum generation capacity is lower.

Dry vacuum pumps were developed in response to concerns about the threat that vacuum pump oil posed to people and the environment; historically vacuum pump oils have contained polychlorinated biphenyls, which have since been discovered to be toxic and carcinogenic.

Dry vacuum pumps avoid this problem and address concerns about pump reliability and maintenance. Dry pumps eliminate the need for contaminant disposal, which can be expensive. Because they do not require oil or fluid checks, maintenance costs are low.

Oilless vacuums vary in design but are often made of heavy-duty stainless steel because of the material's strength and resistance to contamination. Depending on the work environment and requirements, dry pumps can be equipped with vibration isolators and silencers. Some designs feature a cooling water jacket to counteract the high internal temperatures that result from the lack of an oil sealant.

Every oilless vacuum pump is a positive displacement pump, and each pump fits into one of three subcategories: rotary lobe, helical screw and claw. Each design uses two gear-synchronized rotors to trap and compress entering gases.

Rotary lobe vacuum pumps are similar to rotary vane pumps; two rolling rotors separate the chamber, compressing the gas and conveying it out. Helical screw pumps use two screw-like rotors whose threads fit together; gas becomes trapped between the flights of the screws, moved axially and is then discharged. Claw dry vacuum pumps use two claw-shaped rotors to compress the gas.

Oilless Vacuum Pumps Informational Video