Lauda AL 12, Operating Instructions Manual

Page: 16 / 28

Aqualine
16
Preparations
15.03.18/ YACE0086
6.3 Heat transfer liquids
LAUDA
designation
Working
temperature
range
Chemical
designation
Viscosity
(kin)
Viscosity
(kin) at
temperature
Size
Catalogue number
from °C
to °C
mm²/s
at 20°C
mm²/s 5 L 10 L 20 L
Aqua 90 5...90
decalcified
water with
water stabi-
liser
1 -- LZB 120 LZB 220 LZB 320


IMPORTANT There are different sorts of water!

Tap water may be unsuitable for operation due to the calcium carbonate content

risk of
calcification of the stainless steel tank.

High purity water (from ion exchangers) and distilled or bidistilled water are unsuitable for
operation due to the corrosive properties of these media.

High purity water and distil-
lates are suitable as a medium after the addition of 0.1 g of soda (Na
2
CO
3
, sodium car-
bonate) / liter of water.

TIP: Water baths can be operated ideally with LAUDA Aqua 90, available in container
sizes of 5, 10 or 20 liters (order number LZB 120, LZB 220 or LZB 320).


There is a risk of electrochemical oxidation with the use of racks of non-ferrous metals or
non-ferrous metal samples.

The LAUDA Aqualine water bath tanks are produced in stainless steel 1.4301 and are
accordingly resistant to mechanical and chemical stresses.

Due to the different electrochemical potentials of metals electrochemical oxidation may
occur in the case of direct contact between the tank and a rack (e.g. copper) and the bath
may corrode despite the use of the highest quality materials for the tank.

TIP: Avoid the use of this type of rack or the direct contact with this sort of rack or contact
with non-ferrous metal samples and the inside of the container. Use original LAUDA
stainless steel racks and commercially available racks in temperature-resistant plastics.