
18
Coolant Specifications
The coolant quality has a significant effect on the efficiency and life of the cooling system. The
recommendations below will help users to keep their cooling system in good condition with
protection against frost and /or corrosion.
Coolant Quality
To contact the quality of your coolant, contact you local Ingersoll-Rand dealer.
Coolant Specifications
Note:
Basically, harmful chemical properties and substances contained water (as coolant) must
not exceed the limits specified by the manufacturer; however they are tolerable up to the limits
shown in the table below.
Main malign effect
Item
Chemical
Symbol
Unit
Limit Recommended
Corrosion
& Rust
Scale
formation
pH, 25ºC (77ºF)
-
-
6.5 à 8.5 ( 6.5 à 8.0)
0
0
Electrical conductivity,
25ºC (77ºF)
-
uΩ/cm
< 400(< 250)
0
0
Total Hardness
Ca CO
3
PPM
< 100 (< 95)
-
0
M alkalinity
PPM
< 150 (, 79)
-
0
Chlorine
Cl
-
PPM
< 100 (< 100)
-
-
Sulphuric acid ion
SO
2-4
PPM
< 100 (< 50)
0
-
Total Iron
Fe
PPM
< 1.0 (< 1.0)
-
0
Silica
SiO
2
PPM
< 50 (-)
-
0
Residue from evaporation
-
PPM
< 400 (<250)
-
0
The values indicated ( ) are the limits set by the manufacturer. In addition to the items specified above,
turbidity is specified to be above < 15 degrees.
Recommended Types of Long Life Coolants (LLC)
For these engines, all-season, non-amine LLC or equivalent is recommended.
Features of Recommended Brands
None of amines (methyl amines, ethyl amines, n-propyl amines, etc., all being derivatives of
ammonia, NH3) are contained.
Silicate and borate are not contained.
Close to neutral on the pH scale, and hence, slightly basic (alkaline).
Balanced additive ingredients, some being substitutes for amines.
Long life. (The coolant with 20% concentration, for example, retains its efficacy for long, not less
than 2 years).
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