Coolants Inspecting - Man L23/30DF Project Manual

MAN Diesel & Turbo
Coolant
inspecting
Summary
Tools/equipment required
Equipment for checking the
fresh water quality
Equipment for testing the
concentration of additives
Testing the typical values of water
Short specification
Typical value/property
Water type
Total hardness
pH value
Chloride ion content
Table 1: Quality specifications for coolants (short version)
Acquire and check typical values of the operating media to prevent or limit
damage.
The fresh water used to fill the coolant circuits must satisfy the specifications.
The coolant in the system must be checked regularly in accordance with the
maintenance schedule.
The following work/steps is/are necessary:
Acquisition of typical values for the operating fluid,
evaluation of the operating fluid and checking the anticorrosive agent con-
centration.
The following equipment can be used:
▪
The MAN Diesel & Turbo water testing kit, or similar testing kit, with all
necessary instruments and chemicals that determine the water hardness,
pH value and chloride content (obtainable from MAN Diesel & Turbo or
Mar-Tec Marine, Hamburg).
When using chemical additives:
▪
Testing equipment in accordance with the supplier's recommendations.
Testing kits from the supplier also include equipment that can be used to
determine the fresh water quality.
Water for filling
and refilling (without additive)
Fresh water, free of foreign matter
≤ 10 dGH 1)
6.5 – 8 at 20 °C
≤ 50 mg/l
dGH German hardness
1)
1 dGH = 10 mg/l CaO
= 17.9 mg/l CaCO
= 0.179 mmol/L
1 mg/l = 1 ppm
2)
M010.000.002-03-0001 EN
Circulating water
(with additive)
Treated coolant
≤ 10 dGH
≥ 7.5 at 20 °C
≤ 50 mg/l
3
010.000.002-03
1)
2)
1 (2)