Lauda RP 3090 C, Руководство по эксплуатации

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32 / 137 Proline Kryomats 03/2022
6.4 Heat transfer liquids, cooling water and hoses
a) Heat transfer liquids
LAUDA
designation
Temper-
ature
range
Chemical
designation
Viscosity
(kin)
Viscosity
(kin) at
temperature
Flash
point Packing drum
Order 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 95 -95 – 60 Silicone oil 1,6
20 at
–78 °C
64 LZB 130 LZB 230 LZB 330
Kryo 60 -60 – 60 Silicone oil 3 25 at –60 °C 62 LZB 102 LZB 202 LZB 302
Kryo 51
-50 –
120
Silicone oil 5 34 at -50 °C 120 LZB 121 LZB 221 LZB 321
Kryo 30

-30 – 90
Monoethylene
glycol/water
miixture
4 50 at –25 °C -- LZB 109 LZB 209 LZB 309
Kryo 20
-20 –
170
Silicone oil 11 28 at -20 °C 170 LZB 116 LZB 216 LZB 316
Therm 160 60 – 160 Polyalkylene glycol 141 28 at 60 °C 260 LZB 106 LZB 206 LZB 306
Therm 180 0 – 180 Silicone oil 23 36 at 0 °C 250 LZB 114 LZB 214 LZB 314
Therm 250 50 – 250 Silicone oil 130 45 at 50 °C 300 LZB 122 LZB 222 LZB 322


At higher temperatures

Evaporation losses

Use bath covers.
Only use distilled water or fully demineralized high purity water after adding 0.1 g of soda (Na
2
CO
3
sodium
carbonate)/ liter of water

Risk of corrosion!

Water content falls with longer operation at high temperatures

Mixture becomes flammable (flash
point 119 °C)

Check the mixture ratio with a hydrometer.

The use of acidic, aqueous bath liquid or cleaning agents (pH value < 7) is not permissible.

With the selection of the heat transfer liquid, it should be noted that impairment of the properties is
to be expected at the lower limit of the temperature range due to increasing viscosity. Therefore,
only make maximum use of temperature ranges when essential.

Application ranges of heat transfer liquids and hoses are general figures, which may be restricted by
the operating temperature range of the units.

With silicone rubber, silicone oils lead to substantial swelling

Never use silicone oil with silicone hoses.