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Chemical and Process Engineering Resources

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Category: Plant Basics
Question: How does industry classify vacuum pressures?
Keywords: classification,classify,vacuum,pressures,rough,medium,high,ultra,high
Answer: Industry uses four different classes of vaccum:
Rough Vacuum760 to 1 torr
Medium Vacuum1 to 10-3 torr
High Vacuum10-3 to 10-7 torr
Ultra High Vacuumbelow 10-7 torr
Rough vacuum is of prime concern for chemical engineers. This is the range where most vacuum distillation, evaporation, drying, and filtration occurs. Medium vacuum is employed in molten metal degassing, molecular distillation, and freeze drying. High and Ultra High vacuum are used in space simulation, cryogenic research, mass spectrometry, and the production of thin films.
Links: More on Vacuum Systems