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…
Gardner Denver provides vacuum pumps products such as rotary vane vacuum pumps, oilless vacuum pumps, linear and rotary piston pumps for a number of markets and applications. Provides excellent customer service to compliment their line of high-quality products.
MDC Vacuum Products manufactures vacuum components, including butterfly valves, vacuum gauges, and vacuum pumps. Our cryogenic sorption vacuum pumps are an economical roughing source, attaining up to 1x10-3 Torr vacuum level. Other features of our pumps include: clean vibration-free operation, heat regeneration, a positive pressure safety vent, no moving parts, and multiple pump capacity.
Here at US Vacuum Pumps, our broad range of industrial vacuum pumps cannot be topped. It is our dedication to our craft that makes us your premier choice for all of your vacuum pump needs. We will work with you in order to come up with a product that will fit your needs perfectly. All products are available for immediate shipment. To learn more, visit our website or send our qualified staff an...
We are a manufacturer of vacuum pumps, liquid ring vacuum pumps and rotary vane vacuum pumps. We provide custom-engineered, reliable vacuum pumps to meet all your needs. We also offer FloGard® RCP for monitoring the wear and tear on your vacuum pump to foresee problems before they happen.
More Oilless Vacuum Pump Manufacturers
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.
