Lauda Puridest PD 2 D, Operating Instructions Manual

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09/2020 Puridest Bi Distillation Apparatus 7 / 32
1 Using of the Bi Distillation Apparatus
Intended Use 1.1
In LAUDA Puridest Bi Distillation Apparatus models PD 2 D, PD 4 D and PD 8 D, electric heating elements serve to boil
water in the mono stage boiler (left-hand side) and evaporate it. The steam is led to the steel condenser of the mono stage
where it condenses on a water-cooled cooling coil. The produced distillate drips into the boiler of the bi stage (right-hand
side), or can be withdrawn through a stop cock made of borosilicate glass. The electric heating elements in the bi stage
bring the water in the right-hand side alembic to the boil. The steam is led into the condenser of the second distillation
stage and condenses as bi distillate on a water-cooled cooling coil. The condenser of the bi stage, including the splash
protection and cooling coil as well as the complete bi distillate outlet with dust cover are made of Duran® / borosilicate
glass 3.3.
The filling level of both boilers is monitored by two float switches, the heating elements of both stages are additionally
controlled by thermostatic low water cut-offs. After switching the Double Distiller on, it is automatically operated.
Depending on the model, the Double Distiller produces approx. 2 litres (PD 2 D), 4 litres (PD 4 D) or 8 litres (PD 8 D)
bi distillate per hour.
Mono- and Bi-distillate is withdrawn through the two glass fittings at the front of the unit. Attention, the distilled water
leaves the Distillation Apparatus with more than 90 °C! Danger of scaldings! Depending on the tap water quality, the
produced mono distillate has a conductivity of approx. 2.2 µS/cm at 25°C. The produced bi distillate is dependent on
the quality of the evaporated mono distillate and has a conductivity of approx. 1.6 µS/cm at 25°C. To feed the Distillation
Apparatus, preferably use tap water of drinking quality. Please also observe the information in chapters 17.2 to 17.4 of
these instructions on the possible use of filters and cartridges to pretreat the tap water .
The Bi Distillation Apparatus must be operated within the user's field of vision.
The information contained in these operating instructions must by all means be read and observed. Only
then a perfect operation of the Bi Distillation Apparatus can be guaranteed. The units may only be installed
and operated by persons who have made themselves familiar with these operating instructions.
Caution:
The accessible inner parts of the housing that can be reached after removing the outer white cover get
strongly heated up during operation. These parts may only be touched after they have cooled down, or
when wearing suitable safety gloves.
Improper Use 1.2
LAUDA Puridest Bi Distillation Apparatus, operated in a laboratory, are no Medical Devices. They fall neither under na-
tional nor international Medical Device Directives and have to be used and applied accordingly. The Distillation Apparatus
must not be used in potentially explosive surroundings. The Distillation Apparatus must neither be set up nor operated in
laboratory areas with aggressive or corrosive ambient conditions.