Doosan DX190W, Operation And Maintenance Manual

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OP000530 Inspection, Maintenance and Adjustment
4-80
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%