A professional who controls evaporating equipment to concentrate suspensions and solutions to specified degree in vacuum tanks or pans. Respnsibilities include:

• Pumps liquid into evaporator tank or vacuum pan.
• Moves switches to start vacuum pumps and maintain specified pressure.
• Turns valves to admit steam into evaporator chest, coils, tubes, or jackets and regulate steam input to maintain specified temperature.
• Tests concentration of evaporated solution, using refractometer and hydrometer, and adjusts feeds, temperatures, and pressure accordingly.
• Pumps concentrated liquid to storage.
• May tend auxiliary equipment, such as settling tanks, preheating tanks, condensers, and cooling equipment.
• May supervise workers weighing and mixing batches to predetermined formulas.
• May pump batch through sterilizer.
• May control chiller to reduce temperature of fresh citrus juice.
• May be designated according to material evaporated as Evaporator Operator, Molasses; Tomato-Paste Maker.