Fayat Group BOMAG BW 213 D-5, Operating Instruction, Maintenance Instruction

Page: 143 / 222

8.3.3.2 Water quality
The correct quality of water is highly important
when preparing coolant. Clear and clean water
within the boundaries of the following analysis
values should generally be used.
Analysis values
pH-value at 20 °C
(68 °F)
6.5 - 8.5
Chlorine-ion content max. 100 mg/l
Sulphate ion content max. 100 mg/l
Water hardness (ion
content of calcium and
magnesium )
max. 3.56 mmol/l
max: 356 mg/l (ppm)
Germ degree: max. 20 °dH
English degree: max: 25 °eH
French degree: max: 35.6 °fH
Bacteria, fungi, yeasts not permitted
Information concerning the water quality can be
obtained from the waterworks.
If the fresh water analysis values are unknown,
these must be determined with the help of a
water analysis.
If the values of the analysis deviate, the water
must be treated accordingly:
pH-value too low - Adding of caustic lye of
soda or caustic potash sol-
ution.
Water hardness
too high
- Mix with soft, distilled or
fully demineralized water
Chlorides and/or
sulphates too
high
- Mix with distilled or fully
demineralized water
Maintenance – Fuels and lubricants
BW 213 D-5 143