OPM 250 en-GB 33
©
Scania CV AB 2016, Sweden
Cooling system
Antifreeze and corrosion inhibitor con-
centration table
35% by volume of Scania antifreeze provides
sufficient protection against corrosion.
Example:
• The total volume of the cooling system is 40
litres.
• The measured concentration of ethylene gly-
col is 35% by volume (freezing point -21°C).
According to the table there are 14 litres of
ethylene glycol in the cooling system.
• The required concentration of ethylene glycol
is 45% by volume (freezing point -30°C). Ac-
cording to the table, 18 litres of ethylene gly-
col are required in the cooling system.
• Since there are already 14 litres in the cooling
system, 4 litres of ethylene glycol must be
added to the cooling system (18 - 14 = 4 li-
tres).
For calculation Adequate protection against corrosion
Volume of ethylene glycol
(%) 202530 3540455060
Cooling system
volume (litres)
Ice slush forms (°C) -6 -9 -12 -21 -24 -30 -38 -50
Volume of ethylene glycol (li-
tres)
5 6 8 1112141518 30
6 8 10 14 16 18 20 24 40
8 1013 1820232530 50
9 1215 2124273036 60
11 14 18 25 28 32 35 42 70
12 16 20 28 32 36 40 48 80
14 18 23 32 36 41 45 54 90
15 20 25 35 40 45 50 60 100
17 22 28 39 44 50 55 66 110
18 24 30 42 48 54 60 72 120
20 26 33 46 52 59 65 78 130
21 28 35 49 56 63 70 84 140
23 30 38 53 60 68 75 90 150
24 32 40 56 64 72 80 96 160
26 34 43 60 68 77 85 102 170
27 36 45 63 72 81 90 108 180
29 38 48 67 76 86 95 114 190
30 40 50 70 80 90 100 120 200
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