A professional who controls single-stage or multiple-effect evaporators to concentrate chemical solutions to specified density by evaporation. Respnsibilities include:

• Starts pumps and turns valves to admit liquid solution, steam, and cooling water into system.
• Observes temperature, pressure, and vacuum gauge readings and adjusts pumps to conform to specifications.
• Turns feed valves to regulate flow of solution through system and to obtain specified concentration.
• Tests solution pumped from last effect, using hydrometer, to ascertain that solution is concentrated to specified density.
• Observes manometers and looks through sight glass to ensure that steam vapors are not carried to next effect with solution.
• Tests steam condensate with reagents to detect contaminated solution.
• May control equipment from instrumented control board.
• May tend equipment, such as preheaters, thickeners, settlers, and filters, that prepare solution for evaporation.
• May clean evaporator shell and tube nest with chemical to remove scale.
• May operate multiple-effect unit as one or more single evaporators.