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The apparatus consists of an evaporating flask rotated by DC motor in heating water bath. Vacuum distillation of solvent at high and low temperature is achieved quickly and efficiently by use of VARIABLE SPEED motor, which prevents foaming and bumping of the liquid (Solvent) into the evaporating flask and also distillation under controller atmosphere. The evaporating flask is pear shaped to give a large surface area of evaporation and is clamped to a glass duct which goes through the drive unit and protrudes about 150mm into the condenser. The condenser is fitted with standard joint at the top and the bottom for receiver flask Supplied complete with Water Bath Digital and fitted with Digital RPM/Speed Meter Capacity 1 liter.