7.3.10 Automatic filter (2F02)
It is recommended to select an automatic filter with an insert filter in the bypass line, thus
enabling easy changeover to the insert filter during maintenance of the automatic filter. The
backflushing oil must be filtered before it is conducted back to the system oil tank. The
backflushing filter can be either integrated in the automatic filter or separate.
Automatic filters are commonly equipped with an integrated safety filter. However, some
automatic filter types, especially automatic filter designed for high flows, may not have the
safety filter built-in. In such case a separate safety filter (2F05) must be installed before the
engine.
Design data:
50 cSt (SAE 40, VI 95, appox. 63°C)Oil viscosity
see Technical data, "Oil flow through engine"Design flow
100°CDesign temperature
1.0 MPa (10 bar)Design pressure
Fineness:
35 µm (absolute mesh size)- automatic filter
35 µm (absolute mesh size)- insert filter
Max permitted pressure drops at 50 cSt:
30 kPa (0.3 bar )- clean filter
80 kPa (0.8 bar)- alarm
7.3.11 Safety filter (2F05)
A separate safety filter (2F05) must be installed before the engine, unless it is integrated in the
automatic filter. The safety filter (2F05) should be a duplex filter with steelnet filter elements.
Design data:
50 cSt (SAE 40, VI 95, appox. 63°C)Oil viscosity
see Technical data, "Oil flow through engine"Design flow
100 °CDesign temperature
1.0 MPa (10 bar)Design pressure
60 µm (absolute mesh size)Fineness (absolute) max.
Maximum permitted pressure drop at 50 cSt:
30 kPa (0.3 bar )- clean filter
80 kPa (0.8 bar)- alarm
7.4 Crankcase ventilation system
The purpose of the crankcase ventilation is to evacuate gases from the crankcase in order to
keep the pressure in the crankcase within acceptable limits.
Each engine must have its own vent pipe into open air. The crankcase ventilation pipes may
not be combined with other ventilation pipes, e.g. vent pipes from the system oil tank.
7-14 Wärtsilä 46F Product Guide - a19 - 1 December 2017
Wärtsilä 46F Product Guide7. Lubricating Oil System
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