Integral T process thermostats
21/01/2019 / YAWE 0026
Preparations
25
6.4
Heat transfer liquids, cooling water and hoses
a) Approved heat transfer liquids
LAUDA
designation
Working
temperature
range
Chemical
characterizatio
n
Viscosity
(kin)
@ 20 °C
Viscosity
(kin)
at
temperature
Flash
point
Container size
Catalogue number
from °C
to °C
mm²/s
mm²/s
°C
5 L
10 L
20 L
Aqua 90
5
– 90
decalcified
water
1
--
--
LZB 120 LZB 220 LZB 320
Kryo 30
-30
– 90
Monoethylene
glycol/water
mixture
4
50 at -25 °C
119
LZB 109 LZB 209 LZB 309
Kryo 51
-50
– 120
Silicone oil
5
3 at -50 °C
120
LZB 121 LZB 221 LZB 321
Kryo 20
-20
– 170
Silicone oil
11
28 at -20 °C
170
LZB 116 LZB 216 LZB 316
Kryo 40
-40
– 60
Aqueous salt
solution
2.4
10 at
–25 °C
--
LZB 119 LZB 219 LZB 319
Distilled water or fully deionised water should only be used with the addition of 0.1 g per
litre sodium carbonate (Na
2
CO
3
), otherwise danger of corrosion!
Water content falls after prolonged operation at higher temperatures and mixture becomes
flammable (flash point 119 °C)
check mixture ratio with a hydrometer.
Water is only allowed to be used for the models T 1200 (W) and T 2200 (W).
The T 4600 (W), T 7000 (W) and T 10000 (W) should not be filled with pure water, but only
with Kryo 30 or a water-glycol mixture (minimum 70 % : 30 %)!
When selecting heat transfer liquids it should be noted that performance must be
expected to worsen at the lower limit of the operating temperature range due to
increasing viscosity. The full operating range should only be utilised if really necessary.
The application ranges of heat transfer liquids and tubing are for general information only
and may be restricted by the operating temperature range of the equipment.
Silicone oil causes pronounced swelling of silicone rubber. Never use silicone oil with
silicone tubing!
Safety data sheets are available on request!
