LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01
- 16 -
5.
Bath liquids and hose connections
The operating temperature ranges of the bath liquids and tubings represent general data which may be
limited by the operating temperature range of the unit etc.
5.1
Bath liquids
LAUDA
Designation
Working
tem-
perature
range
Chemical
Designation
Visco-
sity
(kin)
Viscosity
(kin) at
Temperature
Ref.No.
Quantity
Former
designation
from °C
to °C
at 20°C
mm²/s
mm²/s
5 l
10 l
20 l
water
+5...+90
deionised
water
➀
--
--
Kryo 30
➁
G 100
➁
-30...+90
Mono-
ethylene-
glycol/water
4
50 at -25°C
LZB 109
LZB 209 LZB 309
Kryo 40
TF 50
-40...+60
Aqueous
solution of
salt
2.4
8 at -20°C
LZB 119
LZB 219 LZB 319
☞
➀
Destilled or deionised high-purity water is corrosive and should only be used with the
addition of about 0.1 g sodium carbonate per litre water. Otherwise its use may lead to
corrosion.
➁
When operating for longer periods at higher temperatures the proportion of water
decreases.
The mixture approaches the properties of pure glycol and becomes flammable
(flashpoint 128
°
C ). The mixture ratio should therefore be checked from time to
time against the original mixture, e.g. using a hydrometer.
For temperatures from
-15 to 90 °C
we recommend a lower ratio of mixture of
monoethylene glycol : water of approx. 3:1. You get this when you dilute Kryo 30 with
the same amount of decalcified water.
Example: 10 L Kryo 30 + 10 L decalcified water results in 20 L with a ratio of mixture
of 3 : 1
When selecting the bath liquid it is to be noted that at the lower limit of the working
temperature range a quality loss is to be reckoned on through the increasing viscosity.
If not required, do not use the full working temperature range therefore.
Ranges of the bath liquids and tubing are general information which can be constricted
by the operating temperature range of the devices.
DIN safety sheets can be requested if required
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