Pumps - Diffusion pump
Diffusion pumps are high vacuum pumps that transport gas molecules using high-speed vapor jets. They are a proven method for achieving high vacuum in laboratories and industry.
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Pumps - Diffusion pump
Diffusion pumps are high vacuum pumps that transport gas molecules using high-speed vapor jets. They are a proven method for achieving high vacuum in laboratories and industry.
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Guide and selection support
Diffusion pumps are used in research and industry to create high vacuum conditions. They are particularly suitable for applications where a clean, oil-based high vacuum is required.
Key selection criteria include the required pumping speed, operating temperature, and compatibility with the existing vacuum system and vacuum level. The type of pump oil and pump configuration are also important.
LabFinder provides an objective overview of diffusion pumps, with information about areas of use and selection criteria, supporting targeted search and procurement for laboratories and technical facilities.
Application and Benefits
Diffusion pumps are specialized high vacuum pumps that use a high-speed vapor jet to transport gas molecules from the pump chamber to the exhaust region. They operate in the molecular flow regime and typically generate vacuum in the high vacuum range. Typical fields of application include research, laboratories, and industrial processes requiring clean and highly pure vacuum, such as in surface analysis, semiconductor manufacturing, or coating technology.
Selection Criteria
Central factors in selecting a diffusion pump include the required pumping speed, achievable ultimate pressure, compatibility with the vacuum system, and integration with existing vacuum technology. The choice of suitable pump oil affects operational safety and maintenance intervals. In addition, thermal requirements, such as pump heating capability and cooling, must be considered.
Variants and Design Principle
Diffusion pumps use the principle of gas jet transport, where a rapidly evaporated vapor acts as a carrier for gas molecules. The vapor is directed at high speed from the pump neck into the attached vacuum chamber, carrying gas molecules to the exhaust. Based on their operating principle, diffusion pumps are classified as momentum transfer pumps. The design mainly varies in size, pumping capacity, and heating power.
Calibration and Maintenance
Diffusion pumps require regular maintenance, which includes checking and replacing the pump oil. Oil quality directly influences the pump's performance and lifetime. It is also important to check heaters and seals to ensure safe and reliable operation. Calibration primarily refers to the verification of vacuum levels in the system with appropriate measuring devices.
Limitations of Application
Diffusion pumps are not suitable for systems where reactive or corrosive gases are continuously processed, as the oil can adsorb contaminants and cause contamination. Damage may also occur with frequent pressure changes or operation at atmospheric pressure. For applications needing very low pressures or specific gas types, other pump types may be more appropriate.
Search Terms and Related Terms
Synonyms such as diffusion vacuum pump, vapor jet pump, or momentum transfer pump assist research. Other relevant terms include high vacuum pump, vacuum technology, gas transport, and diffusion vacuum pumps. These terms support product searches and technical information retrieval for high vacuum generation in laboratory and industrial settings.
Also known as
diffusion-vacuum pump
diffusion pumps
diffusion vacuum-pump
diffusion vacuum pump
diffusion vacuum pumps
high vacuum diffusion pump
vacuum pump diffusion
vapor jet pump
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Frequently asked questions
How does a diffusion pump work?
A diffusion pump creates high vacuum by using a rapidly evaporated vapor jet to transport gas molecules from the pump chamber to the outside. The vapor generates a constant gas flow via momentum transfer, directing the molecules to the outlet.
What types of diffusion pumps are there?
Diffusion pumps are mainly distinguished by size, heating power, and the type of pump oil used. They all operate based on the same vapor jet principle but differ in maximum achievable vacuum level and pumping speed.
What criteria are important when selecting a diffusion pump?
Key factors include the required pumping speed, ultimate pressure, compatibility with existing vacuum systems, and thermal design. The choice of suitable oil type is also important.
For which applications are diffusion pumps suitable?
Diffusion pumps are suitable for high vacuum applications in research and industry, such as semiconductor manufacturing, surface analysis, or process engineering systems where a clean and stable high vacuum is needed.
What are the limitations of using diffusion pumps?
They should not be operated with corrosive or reactive gases, as this can contaminate the oil. They are also less suitable for applications with frequent pressure changes or operation at atmospheric pressure.
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