OP000509
Inspection, Maintenance and Adjustment
4-76
Types of Antifreeze
There are two main classifications of antifreeze available on
the market today.
1.
Ethylene Glycol - Standard Life Antifreeze
2.
Propylene Glycol - Extended Life Antifreeze
Ethylene glycol (standard life antifreeze) has been on the
market for many years. Its chemical properties do not
provide the improved corrosion resistance that propylene
glycol (extended life antifreeze) does. Ethylene glycol is also
very hazardous to the environment, people and animals.
DOOSAN
recommends that ethylene glycol be replaced with
propylene glycol.
The newer propylene glycol antifreeze comes in many
different colors. Some of the colors are pink, red, orange
and yellow. There are even some that come in a blue-green
color. The blue-green color makes it very difficult to tell the
difference of what type of antifreeze is in a cooling system.
The colors are only a dye added to the clear antifreeze. Do
not rely on color. Keep careful machine records of what
brand and type of antifreeze is used in the unit. If you are
unsure of what type of antifreeze is in the system, drain and
flush the system.
NOTE:
Do not mix ethylene glycol and propylene glycol
antifreeze together. If the two are mixed, the
protection level will be reduced to the level of the
ethylene glycol.
Antifreeze Concentration Tables
Ethylene Glycol - Standard Life Antifreeze
(1,000 Hour / 6 Months)
Ambient Temperature
Cooling Water
Antifreeze
-10°C (14°F)
80%
20%
-15°C (5°F)
73%
27%
-20°C (-4°F)
67%
33%
-25°C (-13°F)
60%
40%
-30°C (-22°F)
56%
44%
-40°C (-40°F)
50%
50%
Propylene Glycol - Extended Life Antifreeze
(2,000 Hour / Yearly)
Ambient Temperature
Cooling Water
Antifreeze
-10°C (14°F)
78%
22%
-15°C (5°F)
71%
29%
-20°C (-4°F)
65%
35%
-25°C (-13°F)
59%
41%
-30°C (-22°F)
55%
45%
-40°C (-40°F)
48%
52%
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