BUCHI Rotavapo R-215 - Manual (Page 25)

4 Description of function
25 R-210/215 Operation Manual, Version F
4 Description of function
This chapter explains the basic principle of the instrument, shows how it is structured and gives a
functional description of the assemblies.
4 .1 Functional principle of a Rotavapor
With a Rotavapor, single step distillations are performed quickly and in a product friendly manner. The
basis of this procedure is the evaporation and condensation of solvents using a rotating evaporating
flask under vacuum. Distilling products under vacuum increases the performance and helps to protect
the products.
4 .1 .1 Functional principle considering the V assembly as example
1
2
3
4
Fig. 4.1: Overview of a V assembly
a Evaporation area
The solvent is heated by means of a heating bath. A thin solvent film forms on the inside of the rotating
evaporating flask, resulting in an increased evaporation rate. The rotations also lead to an even mixing
of the sample thus preventing stationary overheating in the flask.
b Rotation drive including vapor duct
The drive unit ensures that the evaporating flask rotates evenly.
The integrated vapor duct transports the vapor from the evaporation area to the cooling area.