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The gas ballast valve on a mechanical oil-sealed rotary vacuum pump is a very simple device that offers several potential benefits for vacuum pump users and when used correctly can keep a vacuum pump working well. However, gas ballast valves but are often overlooked and are poorly understood, this article helps take some of the guesswork out.
An excerpt: “When pumping atmospheric air (or gas) in a vacuum system, however “pure” it may appear to be, it will invariably contain some vapor. During the compression process in the pump, this vapour will condense. Failure to remove it will form a contaminant which will prevent the pump from achieving its optimum vacuum pressure. Also, the condensate can enter the pump’s mechanism, for example the oil in oil-sealed rotary pumps, where, as a contaminant, it can have a detrimental effect.” >> Continue Reading