Pumps - Vacuum pump
Vacuum pumps generate controlled negative pressure for various laboratory applications. Selection depends on vacuum level and operating principle.
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Pumps - Vacuum pump
Vacuum pumps generate controlled negative pressure for various laboratory applications. Selection depends on vacuum level and operating principle.
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LaboTechSystems LTS AG
Milian SA
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Guide and selection support
Vacuum pumps are primarily used in laboratories to create a defined vacuum, such as for filtration, drying, or evacuating containers. These devices are essential in analytical technology and material testing. When selecting a pump, factors such as the required ultimate vacuum, pumping speed, and physical operating principle should be considered. Frequently, combinations of backing and main pumps are used to cover different vacuum stages. LabFinder offers a clear overview of vacuum pumps with information on applications, technical criteria, and variants. This provides users with objective guidance for purchasing and selecting pumps for everyday laboratory use.
Application and Benefits
Vacuum pumps are used in laboratories to generate negative pressure (vacuum) required for various applications such as filtration, distillation, drying, or evacuation. They are indispensable in analytics, microbiology, and chemical process engineering, enabling processes with controlled pressure conditions. Vacuum allows optimization of reaction conditions and handling of sensitive samples.
Selection Criteria
Key selection criteria for vacuum pumps include the achievable vacuum level, pumping speed (volume flow), and the pump's operating principle. Gas transfer vacuum pumps are designed for continuous gas transfer, while gas-binding pumps adsorb gases physically or chemically. The choice depends on the application, target vacuum, and process parameters. For very low pressures, two-stage pump combinations are often used, e.g., a rotary vane pump as the backing pump and a specialized pump to achieve the ultimate pressure.
Variants and Operating Principles
Vacuum pumps can be classified according to their operating principle into gas transfer vacuum pumps and gas-binding vacuum pumps. Typical models include rotary vane pumps, diaphragm pumps, and turbomolecular pumps. Backing pumps are often used to create a preliminary vacuum before a high-vacuum pump achieves the final pressure. Variants also differ in noise level, maintenance requirements, and chemical resistance.
Calibration and Maintenance
Regular maintenance is important to ensure the performance and service life of vacuum pumps. This includes oil changes for oil-lubricated models, checking seals and filters, and cleaning. Calibration of connected vacuum gauges supports monitoring of pumping performance and generated vacuum, ensuring process stability and transparency of measurements.
Limitations of Use
Vacuum pumps are designed for specific pressure ranges and media. Not all pump types are suitable for aggressive gases, dust, or moist media. Achieving very low ultimate pressures often requires specialized pumps or combinations. In addition, worn parts or improper use can impair function. Proper selection and correct operation are therefore crucial.
Keywords and Related Terms
Synonyms and keywords include: vacuum pump, vakumpumpe, vacuum-pump, vacuum pump unit, vacuum apparatus, vacuum technology, laboratory vacuum pump, vacuum pumps, gas transfer vacuum pump, gas-binding vacuum pump, and backing vacuum pump. Closely related categories are aspiration systems and pressure measuring devices, which complement vacuum technology.
Also known as
laboratory vacuum pump
vacuum-pump
vacuum device
vacuum pump
vacuum pump equipment
vacuum pump laboratory
vacuum pumps
vacuum pump system
vacuum technology
vakumpumpe
Related categories
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Frequently asked questions
How does a vacuum pump work in the laboratory?
Vacuum pumps use various physical operating principles, such as displacement or adsorption, to generate negative pressure, which is used in laboratory applications like filtration or drying.
What types of vacuum pumps are there?
Basically, there are gas transfer vacuum pumps, which mechanically move gases, and gas-binding vacuum pumps, which bind or adsorb gases at the molecular level. Additionally, there are backing pumps and main pumps for different vacuum stages.
What criteria are important when selecting a vacuum pump?
Important factors are the required vacuum level, pumping speed, operating principle, as well as media compatibility and maintenance needs. For achieving low ultimate pressures, multiple pump stages are often combined.
When are combinations of vacuum pumps useful?
To achieve very low pressures below 10^-3 mbar, at least two pump stages are usually necessary, for example a rotary vane backing pump and a high-vacuum pump to efficiently reach the target pressure.
What are typical limitations when using vacuum pumps?
Limitations arise from chemical compatibility, the gas flow to be pumped, moisture or dust, the achievable vacuum level, and the pumping speed of the chosen type. These factors can restrict the use or efficiency of a vacuum pump.
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