Transcription of Basic Vacuum Technology Principles - Festo USA
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Basic Vacuum Technology Principles - Festo USA
Subjecttochange1 Internet: Principles of Vacuum Technology , brief overviewIntroductionBasic Principles of Vacuum technologyWhat is a Vacuum ? Vacuum rangesUnits of measurementA Vacuum is a space entirely devoid ofmatter ( absolute Vacuum ).In practice we talk about a vacuumwhen the air pressure in a space liesbelow atmospheric [pa]P[mbar]There are a large number of nationaland international units ofmeasurement. The most commonlyused units are Pascal (Pa) and bar100Pa =1hPa1hPa =1mbar1 mbar = barThe Vacuum level is often expressedas a % value. However, these arealways relative = Rough vacuumFV = Medium vacuumHV = High vacuumUHV = Ultra-high vacuumWhat is a Vacuum used for?
aperformancelevelof80%vacuum achievesabsolutepressureof approx.0.2 bar(200 mbar). Thisair pressurefallswithincreasing altitude.Uptoaheightof2,000 m, thereisa linear dropin pressureby approx.12.5mbarper100mto 763mbar. However,althoughthesamevacuum generator still hasthesame performancelevel of80%vacuum, thisfigureof80%referstothe ...
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