n Avoid chlorine content in the water at all costs. Do not add chlorine
to the water. Cleaning agents and disinfectants, for example, contain
chlorine.
n The water must be free of impurities. Water with iron content is unsuit-
able due to rust formation and untreated river water is unsuitable due to
algae growth.
n The addition of ammonia is not permitted.
Table 4: Permissible heat transfer liquids for Integral T
Designation
Chemical characteri-
zation
Working tem-
perature range in
°C
Viscosity (kin) in
mm²/s at 20 °C
Viscosity (kin) in
mm²/s at tem-
perature
Flash point
in °C
Kryo 51 Silicone oil -50 – 120 5 34 at -50 °C 120
Kryo 30
Monoethylene glycol/
water mixture
-30 – 90 4 50 at -25 °C ---
Kryo 20 Silicone oil -20 – 170 11 28 at -20 °C 170
Aqua 90
1
Decalcified water 5 – 90 1 --- ---
Ultra 350
Aromatic hydro-
carbon
30 – 200 48 16 at 40 °C 212
Ultra 301
2
Mineral oil 40 – 230 76.5 35.4 at 40 °C 245
Please note:
1
Aqua 90 or water may only be used in the Integral 130 T and
230 T(W) devices.
2
Recommendation: Overlay with nitrogen at 150 °C and above
Table 5: Permissible heat transfer liquids for Integral XT (closed system)
Designation
Chemical characteri-
zation
Working tem-
perature range in
°C
Viscosity (kin) in
mm²/s at 20 °C
Viscosity (kin) in
mm²/s at tem-
perature
Flash point
in °C
Kryo 95 Silicone oil -95 – 160 1.6 20 at -80 °C 64
Kryo 71 Silicone oil -70 – 220 5.3 44 at -60 °C 125
Kryo 70 Silicone oil -70 – 220 5 42 at -60 °C 121
Kryo 65 Hydrocarbon -65 – 140 1.7 10 at -40 °C 62
Kryo 30
1
Monoethylene glycol/
water mixture
-30 – 90 4 50 at -25 °C ---
Ultra 350
2
Aromatic hydro-
carbon
30 – 350 48 16 at 40 °C 212
Ultra 301 Mineral oil 40 – 300 76.5 35.4 at 40 °C 245
Please note:
n
1
Do not use Kryo 30 in devices with cascade cooling.
n
2
Use Ultra 350 for the Integral high-temperature thermostats.
V6 Integral Process Thermostats and High-Temperature Thermostats 41 / 198
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