4.4 LAUDA heat transfer liquids
DANGER!
Use of unsuitable heat transfer liquid
Fire
Select a heat transfer liquid with a temperature range suit-
able for the application.
Please note:
n
If the heat transfer liquid reaches the lower limit of the temperature
range, the temperature control properties can be expected to deterio-
rate as a result of the increase in viscosity. Therefore, only fully utilize
this temperature range when absolutely necessary.
n
Never use contaminated heat transfer liquid. Contamination in the
pump housing can cause the pump to seize and the device to shut down.
n
Observe the safety data sheets for the various heat transfer liquids. If
required, you can download the safety data sheets from our homepage.
Open the LAUDA homepage, tap
Services
Download center
.
In the Download center, chose the [Safety data sheet] option in the
[Document type] drop-down list.
A list of safety data sheets in PDF format in different languages is
displayed.
Tap the relevant safety data sheet.
The download starts and the PDF file is downloaded.
Please note:
n
When using Kryo 30:
The water content decreases during longer periods of operation at
higher temperatures and the mixture becomes flammable (flash point
119 °C). Check the mixing ratio using a hydrometer.
n
When using Aqua 90:
Evaporation losses occur at higher temperatures.
n
When using Ultra 350 and Kryo 65:
EPDM hoses are not suitable for Ultra 350 and Kryo 65.
n
When using mineral oils:
EPDM hoses are not suitable for mineral oils.
n
When using silicone oils:
Silicone hoses are not suitable for silicone oils.
n
The proportion of alkaline earth ions in the water must be between
0.71 mmol/L and 1.42 mmol/L (equivalent of 4.0 and 8.0 °dH). Harder
water leaves limescale deposits in the device.
n
The pH value of the water must be between 6.0 and 8.5.
n
Distilled, deionized or fully desalinated (FD) water is unsuitable due to its
reactivity. High-purity water and distillates are suitable as a heat transfer
liquid after 0.1 g of soda (Na
2
CO
3
, sodium carbonate) is added for every
liter of water.
n
Sea water is unsuitable due to its corrosive properties.
Heat transfer liquid, water
V6
Integral Process Thermostats and High-Temperature Thermostats
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