RE-2010 rotary evaporator mainly used for continuous distillation of a large amount of volatile solvent under negative pressure. Especially for the concentration of extract liquor and distillation of receive liquid when chromatograph, it can isolate and purify reaction product. In reduced pressure condition, when solvent distillation, distillation flask in continuous rotation, the distillation flask is a pyriform or round-bottom flask who is connected to vacuum pump by a snakelike condenser pipe, the other open mouth of condenser pipe is connected to receiving flask to receive evaporated organic solvent. There is a three-way valve between condenser pipe and vacuum pump, when system connect to air, take down distillation flask and receiving flask to transfer solvent. Please reduce pressure first before rotate distillation flask; and please power off first before connect to air, to prevent the rotating distillation flask from falling off. Thermostatic water bath is the heat source for distillation. RE-2010 rotary evaporator mainly used in medicine, chemical engineering, biopharmacy industries for the concentration, crystallization, drying, separation and solvent recovery, especially suitable for concentrate and purify high temperature easily decomposed material.