Marine Installation Manual 2022-03 4-67
4 Ancillary Systems
4.6 Pilot fuel oil system
X62DF-S2.0
Pilot fuel oil filter
A 10 m filter is provided in the engine’s pilot fuel unit.
On the system side, a 10 m (absolute sphere passing mesh size) duplex filter as
specified in Table 4-10 must be installed. For the installation position see MIDS.
Table 4-10 Specification of the pilot fuel oil filter on the system side
Type Duplex filter
Working viscosity 2-17cSt required for MDO /MGO
Flow rate According to GTD. The capacities cover the needs of the
engine only. If a filter of automatic back-flushing type is in-
stalled, the feed and booster pump capacities must be in-
creased by the quantity needed for back-flushing of the filter.
Service pressure Max. 10bar at filter inlet
Test pressure Specified by classification society
Permitted differential
pressure at 14 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
pressure of filter insert
Max. 3 bar differential across filter
Filter insert mesh size Specified max. 10 m abs.
Filter insert material Stainless steel mesh (CrNiMo)
Working temperature Up to 50 °C
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