Oilless Vacuum Pumps

A reliable source for Vacuum Pump information and leading Vacuum Pump Companies & Manufacturers.

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.

Leading Manufacturers

Randolph, NJ  |  973-252-8200

Experts in the design of process liquid ring vacuum pump systems since 1986. Reliability is our primary goal. We design the most advantageous vacuum system for each customer’s objectives. Our expertise includes Liquid Ring, Rotary Vane, Once-Thru-Oil Rotary Vane and Dry Vacuum Pumps, plus multi-stage hybrid designs and vapor extraction/recovery.

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Wintek Corporation $$$

Gardena, CA  |  310-667-4375

McKenna Engineering has over four decades years of experience developing vacuum pump solutions for every industry under the sun, around the world. Markets served include chemical, aerospace, high tech, and many more. We are an ISO 9001:2015 certified company. When you choose McKenna, you choose top-notch services and products that are delivered on time. Contact us today to get started with us!

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McKenna Engineering $$$

Greentown, PA  |  570-676-3500

Vacuum Pump Rebuilders and Welding Services: Offering vacuum pump sales, vacuum pump service, vacuum pump rebuilding and a full selection of vacuum pump parts for most makes and models of vacuum pumps including Alcatel, Busch, Edwards, Kinney, Leybold, Precision, Varian and Welch. We specialize in providing high quality rebuilt vacuum pumps that are affordable and dependable.

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Vacuum Pump Rebuilders & Welding Services $$$

Kalama, WA  |  360-574-6722

Somarakis, Inc. supplies the very best in high performance positive displacement blowers, screw compressors and vacuum pumps. Based on 42 years of experience, Somarakis offers client-orientated solutions in the field of twin shaft rotary piston machines for a number of industrial vacuum pump applications. Committed to quality and innovation, Somarakis, Inc. has the solution to your vacuum pump challenge.

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Somarakis, Inc. $$$

Boise, ID  |  208-362-4721

Pneumotech Inc. Is the Nations Foremost Manufacturer of Compressed Air & Vacuum Systems. We offer innovative cost-effective solutions to your compressed air and vacuum system requirements. As a further service benefit to you; "the Customer" we also offer automated lubrication systems, design, repair, installation, parts, components, systems and lubricant sales.

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Pneumotech Inc. $$$
placeholder image Wintek Corporation McKenna Engineering Vacuum Pump Rebuilders & Welding Services Somarakis, Inc. Pneumotech 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

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