Marine Installation Manual
2021-08
4-19
4 Ancillary Systems
4.3 Lubricating oil systems
X72DF
Full-flow filter
The drain from the filter is to be sized and fitted to allow free flow into the lubri
-
cating oil drain tank.
The output required for the main lubricating oil pump to ‘back-flush’ the filter
without interrupting the flow is to be taken into account when estimating the
pump capacity (see
).
Booster pump for
crosshead lubrication
Type
a)
a) Optional: changeover duplex filter designed for in-service cleaning, with differential pressure gauge
and high-differential pressure alarm contacts
Automatic back-flushing filter with differential pressure
gauge and high-differential pressure alarm contacts.
Designed to clean itself automatically using reverse flow
or compressed air techniques.
Back-flushing oil treatment by sludge checker.
Oil flow
Refer to
.
Working viscosity
95cSt, at working temperature
Working pressure
6bar
Test pressure
Specified by classification society
Diff. pressure, clean filter
Max. 0.2bar
Diff. pressure, dirty filter
Max. 0.6bar
Diff. pressure, alarm
Max. 0.8bar
Note: Real operational settings could be less according to
filter maker’s recommendation.
Mesh size
Sphere passing max. 0.035mm
Filter material
Stainless steel mesh
Filter inserts bursting press.
Max. 3bar differential across filter
Type
Positive displacement screw or gear types with built-in
safety valves
Capacity
According to
: The flow rate is to be within a tolerance
of 0 to 10% of the GTD value.
Delivery head
Refer to
.
Working temperature
Approx. 45°C
Oil type
SAE 30, 95cSt at working temperature; when sizing the
pump motor the maximum viscosity to be allowed for is
400cSt.
