A) Evaporator unit / B) Condenser part/ C) Control / Dimensions

Exclusive use of borosilicate 3.3 glass and PTFE for all product-based parts offers the following benefits:

• Proper observability of all process in the areas of evaporation and condensation
  
• Total chemical resistance against nearly all mediums
  
• Careful evaporation
  

Rotary evaporators belonging to the R product range, which are preferrably used in production and pilot plant are suitable for continuous and discontinuous distillation under normal pressure or in a vacuum. They have the advantage of providing careful thermal treatment of temperature-sensitive mediums. Application limits for the rotary evaporator arise among other things as a result of the relatively long dwell time and the attainable viscosity of the final product. Above reliable or attainable limit values, therefore, we recommend the use of our thin-film evaporator which permits a maximum viscosity of the residue of approx. 5000 cP.

Rotary evaporators are suitable for evaporating suspensions, initiating crystallisation processes and drying powders and granulates. It is also possible to carry out various chemical reactions.

Additional special features of this rotary evaporator are:

• The robust driving of the rotary flask by a PTFE-lined steel sleeve shaft and their sealing of the condenser part using a proven PTFE axial face seal (suitable for permanent and maximum load).
• The possibility of choosing between different housing or bath models, types of heating, condenser parts and different varieties of display and control parts (modular system, see order number key).
• Simple operation
  

Order number key

Principle of operation

The liquid to be processed in the rotary evaporator is fed directly into the rotary flask by a feed pipe conducted through the condenser part. When operating under normal pressure, i.e. with open air release valve, this happens by means of a pump or through gravitational force, depending on the arrangement of the supply vessel.
Evaporation takes place in the externally heated rotary flask. In this way the rotational movement of the piston ensures a good intermixing of the medium, thus providing regular temperature distribution. The rotary flask is indirectly heated by a water or oil bath to which the necessary energy is fed in a regulated way by steam or an electrical heating unit. The steam abandons the flask at the point where it is flanged to the drive motor. It flows through a sleeve shaft feeding through the drive and reaches the condenser part. There it is condensed in the condenser and cooled in an after-cooler. Then the condensate reaches the recipient container(s). A reversible alternating recipient enables condensate to be withdrawn during operation under normal pressure and in a vacuum. The simple recipient makes this possible only with distillation under atmospheric pressure.

Verdampfungsleistung

<<<< Evaporation rates of carbon tetrachloride with the flask rotation speed
(heating bath: water 90°C)

• Module A / evaporator unit
• Module B / condenser part
• Module C / control
• Dimensions

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