Gas-Ballast Pump

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Gas-Ballast Pump

 

a mechanical vacuum pump with a special chamber that is filled with an inert constituent (atmospheric air) for preventing vapor condensation during the process of compression.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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