YBOTECH Rotary evaporators are used for standard distillation, crystallization, product concentration, powder drying, and separation of one or several solvents. Rotary evaporators are now being used in more and more laboratory kitchens as well. There is a wide variety of accessories available for the rotary evaporator including vacuum pumps, vacuum controllers, temperature sensors, and glassware. For pilot plants and industrial use, most scientists require Large-Scale 20 liter Rotary Evaporators. The relationship between the pressure and vapor temperature of a selection of solvents should be considered when distilling. The temperature difference between the vapor temperature and cooling medium should be at 20C to result in sufficient condensation. The temperature difference between the heating bath and vapor temperature should be at 20C to reach a sufficient distillation rate.