Related to Vacuum pan: vacuum pan salt
|(Technol.)||a kind of large closed metallic retort used in sugar making for boiling down sirup. It is so connected with an exhausting apparatus that a partial vacuum is formed within. This allows the evaporation and concentration to take place at a lower atmospheric pressure and hence also at a lower temperature, which largely obviates the danger of burning the sugar, and shortens the process.|
See also: Vacuum
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.