Product vapour driven jet vacuum pumps employ vapours other than steam as the motive medium, but in all other respects are exactly as conventional steam jet vacuum pumps. The benefit of this type of unit is that they while retain all the advantages of conventional ejector sets, that is no moving parts, minimal maintenance requirement, tolerant to fouling, etc., any condensate producted is liquid product and may be returned to the process, thus effluent is eliminated from consideration. These units have been supplied employing Ethylene Glycol, MonoChloroBenzene, Toluene, Butanol, and many other motive media.
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