Lauda Alpha, Operating Instructions Manual

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24 / 54 Alpha 09/2020 j
6.3 Heat transfer liquids and hoses
Approved heat transfer liquids
LAUDA
Designation
Working
temperature
range
Chemical
Designation
Viscosity
kin
Viscosity
kin
@
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 1 --
LZB 120 LZB 220 LZB 320
Kryo 30

-30 – 90
Monoethylen-
glycol/water
mixture
4 50 at -25 °C LZB 109 LZB 209 LZB 309


At higher temperatures

Evaporation losses

Use bath covers.
Distilled water or fully deionised water must only be used with the addition of 0,1g sodium carbonate
(Na
2
CO
3
)/litre water, otherwise

danger of corrosion!

Water content falls after prolonged operation at higher temperatures

mixture becomes flammable (flash
point 119 °C)

check the mixture ratio with a dosimeter.
Safety data sheets are available on request.
Important:

The units are designed for operation with non-flammable liquids to DIN EN 61010-2-010.
Hoses
Tubing type
d
i
x t
[mm]
Temperature
range °C
Application
Catalogue
number
EPDM-tubing,
non-insulated
9 x 2 10 – 90
for all LAUDA heat transfer liquids
except for Ultra 350 and mineral oils
RKJ 111
EPDM-tubing,
non-insulated
12 x 2 10 – 90
for all LAUDA heat transfer liquids
except for Ultra 350 and mineral oils
RKJ 112
Silicone tubing,
insulated
11 -60 – 100
for all LAUDA heat transfer liquids
except silicone oils
LZS 007

Protect tubing with hose clips against slipping off!