Marine Installation Manual 2022-03 4-76
4 Ancillary Systems
4.7 Fuel oil system
X62DF-S2.0
The 10 m abs. filter can be installed in two different locations:
Option 1
Filter installation in the feed system:
In this position the maximum 10 m abs. filter can be designed for a lower flow
rate compared to the installation in the booster system. However, higher resist-
ance due to higher fuel viscosity needs to be considered.
Advantage and disadvantage of this filter position:
Table 4-11 Specification of automatic self-cleaning filter in feed system
Advantage Booster pump is protected against abrasive catfines
Disadvantage Engine is not optimally protected against booster pump wear particles
Working viscosity 100 cSt, for HFO of 700 cSt at 50°C
Flow rate According to GTD. The capacities cover the needs of the en-
gine only. The feed pump capacity must be increased by the
quantity needed for back-flushing of the filter.
Service pressure after feed
pumps
10 bar at filter inlet
Test pressure Specified by classification society
Permitted differential press.
at 100 cSt
— clean filter: max. 0.2 bar
— dirty filter: max. 0.6 bar
— alarm setting: max. 0.8bar
Note: Real operational settings could be less according to
filter maker’s recommendation.
Minimum bursting press.
of filter insert
Max. 3 bar differential across filter
Mesh size Max. 10 m abs.
Mesh size bypass filter Max. 25 m abs.
Filter insert material Stainless steel mesh (CrNiMo)
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