Cooling system Antifreeze and corrosion inhibitor con- centration table 35% by volume of Scania antifreeze provides sufficient protection against corrosion. Example: 1. The total volume of the cooling system is 40 litres in this example. 2. 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. 3. The required concentration of ethylene gly- col is 45% by volume (freezing point -30 °C). According to the table, 18 litres of eth- ylene glycol are required in the cooling sys- tem. 4.
Since there are already 14 litres in the cool- ing system, 4 litres of ethylene glycol must be added to the cooling system (18 - 14 = 4 litres).
OPM 300 en-GB 47 © Scania CV AB 2015, Sweden For calculation Adequate protection against corrosion Volume of ethylene glycol (%) 20 25 30 35 40 45 50 60 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 11 12 14 15 18 30 6 8 10 14 16 18 20 24 40 8 10 13 18 20 23 25 30 50 9 12 15 21 24 27 30 36 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