Coolant - Vetus D-LINE VD4.120 Operation Manual

11 Operating media
Coolant fluid
The preparation and monitoring of coolant in inter-cooled engines is
especially important because corrosion, cavitation and freezing can
lead to engine damage. Use as coolant a mixture of a cooling system
protective liquid (anti-freeze, ethylene glycol based) and tap water.
Or use a, ethylene glycol based premix coolant i.e., 'ready-to-use' cool-
ant. For example Vetus VOC Organic coolant.
In tropical climates, where anti-freeze availability may be limited, use a
corrosion inhibitor to protect the engine cooling system.
The concentration of the cooling system protective liquid in the cool-
ant should not fall below/exceed the following limits:
Cooling system protective
liquid (Anti-freeze)
max. 45 vol%
40 vol%
min. 35 vol%
The protective liquid concentration must be maintained under all cir-
cumstances. Therefor if coolant must be added always use the same
mixture of anti-freeze and tap water.
Water Protection against
freezing to
55% -35°C (-31°F)
60% -28°C (-18°F)
65% -22°C (-8°F)
Water quality for coolant preparation
Use preferably tap water.
If an other available fresh water is used; the values given below must
not be exceeded.
Water quality
pH-value at 20°C (68°F)
Chloride ion content
Sulfate ion content
Total hardness
Never use sea-water or brackish water.
Cooling system protective liquids must be disposed of
in accordance with environmental regulations.
min.
6.5
3
[mg/dm ] –
[mg/dm 3 ] –
[degrees] 3
C
aution
W
arning

Coolant

max.
8.5
100
100
12
119