Dry models, offered by Becker, rely on self-lubricating materials and simplified maintenance. Oil-lubricated models stand out for their superior vacuum performance.
Dry design: Carbon-graphite vanes in direct contact with the pump housing wall, no oil, easy maintenance.
Oil-lubricated design: Oil film on the pump housing wall, fiberglass vanes, optimized intake and exhaust systems.
Performance: Vacuum limited to 100 mbar abs. for dry pumps, down to 0.1 mbar abs. for oil-lubricated models.
Robustness and adaptability are key arguments guiding the choice depending on the working environment, the nature of the gases handled, and maintenance requirements.
Dry rotary vane vacuum pumps eliminate the use of oil and rely entirely on self-lubricating vanes. Their simplified design reduces maintenance operations and allows optimal control of exhaust air, making them ideal for sensitive environments such as food processing or printing.
However, the absence of an oil film results in a physical limitation on achievable vacuum levels, generally around 100 mbar absolute. Despite this constraint, their ability to handle significant pressure variations makes dry rotary vane pumps a preferred choice in many industries.
Find out more about dry-running vane pumps
In dry rotary vane vacuum pumps, innovation focuses on carbon-graphite vanes. Known for their self-lubricating properties, these components easily withstand repeated friction against the pump housing wall.
Advantages of carbon-graphite vanes:
At Becker, this material choice ensures consistent performance even during long continuous operating periods.
Oil-lubricated versions use a sealing oil film applied to the pump housing wall, ensuring no internal leakage. This proven principle reduces mechanical clearances while dissipating heat generated during compression.
Oil is not only used for sealing: it also lubricates moving parts and acts as a protective barrier against corrosion. This system ensures optimal efficiency and ultimate pressure, particularly valued in food processing, chemical applications, and electronic component manufacturing.
Find out more about oil-lubricated vane vacuum pumps
| Aspect | Dry pump | Oil-lubricated pump |
| Max vacuum (absolute pressure) | ~100 mbar | ~1 mbar |
| Possible contaminants | Dry air | Air, vapors, liquid traces |
| Maintenance | Low | Oil monitoring |
When operating with oil, fiberglass vanes provide increased wear resistance while maintaining excellent rigidity. Combined with special resins, deformation is limited during strong thermal variations, and optimal sliding within the oil film is ensured.
This innovation results in longer service life, fewer interventions, and stable performance even under intensive use.
Achieving minimal absolute pressure is the key objective of any vacuum pump. Oil-lubricated rotary vane models excel in this area, with pressures approaching 0.1 mbar abs., providing deep vacuum suitable for demanding manufacturing processes.
Applications where low pressure is critical:
This ability to control absolute pressure positions Becker rotary vane vacuum pumps among market references.
The oil tank plays a triple role: it serves as a constant lubrication source for all moving parts, contributes to system cooling by dissipating heat generated during compression cycles, and reduces internal leakage where air could stagnate and reduce efficiency.
The efficiency of the oil reservoir directly affects the longevity of rotary vane vacuum pumps and their ability to operate at deep vacuum.
A notable example at Becker shows a 15% reduction in operating temperature thanks to optimized oil circulation.
The gas ballast innovation dates back to the development of the first oil-lubricated rotary vane pumps. This device introduces a small amount of dry air into the compression chamber, preventing condensation of persistent vapors such as water or certain solvents.
Concrete benefits of gas ballast:
Gas ballast is particularly relevant in the food industry, where extracted gas mixtures are rarely moisture-free.
The addition of oil lowers the attainable ultimate pressure while improving motor energy efficiency due to better sliding of moving parts and reduced friction. In Becker installations, a decrease in motor heating rate can be observed, translating into energy savings that are crucial on an industrial scale.
| Criterion | Dry pump | Oil-lubricated pump |
| Energy efficiency | Good, pressure-dependent | Excellent stability |
| Motor power (deep vacuum) | Moderate | Optimal, reduced consumption |
Each pump integrates key elements whose synergy determines overall efficiency: cylindrical housing, eccentric rotor, vanes, pumping chambers, non-return valve, and exhaust separator. The precise sizing of these components ensures smooth operation, perfect sealing, and reliable suction.
The cycle begins with air intake, formation of the compression chamber by the eccentric rotor, sealed sliding of the vanes, air transport to the exhaust, and finally protection provided by the non-return valve.
Overall diagram and interactions between pump housing, rotor, and vanes:
The non-return valve protects the pump from accidental backflow when the pump stops, preserving vacuum in the application. The exhaust separator ensures discharge without pressure loss or external air ingress, contributing to high performance throughout the operating cycle.
Proper maintenance significantly extends the service life of rotary vane vacuum pumps. On oil-lubricated models, regular monitoring of oil level and purity is essential, while on dry pumps, inspection of carbon-graphite vane condition is critical.
Key maintenance points:
Following these best practices ensures optimal pumping performance and daily peace of mind.
Discover our tailor-made service solutions
Rotary vane vacuum pumps operate in diverse environments: food packaging machines, industrial rolling mills, vacuum lifting systems, laboratory analyzers, offset printing, etc.
Their versatility, combined with customizable vacuum levels, makes them indispensable in sectors such as chemistry, pharmaceuticals, and materials science.
Key application sectors:
Competition with other technologies depends on desired vacuum level, contaminant resistance, and maintenance ease.
For reliable intermediate vacuum without oil contamination, dry pumps are ideal.
For deep vacuum applications with high compression ratios, oil-lubricated variants are the benchmark.
| Pump type | Ultimate vacuum | Contaminant compatibility | Maintenance |
| Dry vanes | Medium vacuum (100 mbar) | Dry air, low particles | Low |
| Oil-lubricated vanes | Deep vacuum (1 mbar) | Air, vapors, light liquids | Regular oil monitoring |
Becker Druk- en Vacuümpompen B.V.
Expansielaan 5
8447 SP Heerenveen
Netherlands
Phone: +31(0)513 65 18 00
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