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Read the articleAUTHOR
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Jean LECLERC: Engineer from the École supérieure de chimie industrielle de Lyon - Doctorate (3rd cycle) in inorganic and structural chemistry - Consultant
INTRODUCTION
In the article on positive displacement pumps published in Techniques de l'Ingénieur, it was noted that the principle behind these pumps is purely compression by volume variation. This is not the only physical principle that enables gases or vapors to be evacuated or transferred from an enclosure to a vacuum.
The second principle involves changing the velocity vector of the molecules in order to drive them into another medium. This change can be achieved in a number of mechanical ways, by imparting velocity components to the molecules to make them move wherever we want. These means differ from one another, from the macroscopic (turbine blades...) to the microscopic (impact of fluid molecules on the molecules to be pumped...). This gives us the different types of pump:
fluid-powered pumps (ejector, etc.) ;
mechanically driven pumps (turbomolecular pump, axial turbine and side channel).
For further information on vacuum generation and positive displacement pumps, please refer to the following articles
and
of this treatise
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Gas transfer pumps
Normative definition
Bibliography
In Engineering Techniques
Standardization
Standards cited in articles [BM 4 271] and [BM 4 272].
Pneurop standards
- Conditions de réception des pompes à vide. Partie 1. Pompes rotatives à joint d'huile et pompes Roots. Équivalente à ISO 1607/1 et ISO 1607/2. Cette norme peut être consultée au Syndicat des constructeurs. - 6602 -
French Standards Association (AFNOR)
- Vocabulaire. Pompes à vide. - NF X 10-501 -...
Organizations
Syndicat des constructeurs de compresseurs, turbocompresseurs et pompes à vide (French association of compressor, turbocharger and vacuum pump manufacturers)
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Union Internationale des Sciences Techniques et applications du vide (International Union of Vacuum Science, Technology and Applications) (46 national vacuum societies, including SFV)....
Manufacturers. Suppliers
The main vacuum pump manufacturers and suppliers are listed in tables 1 and 2 .
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