NOTE
These dimensions are for guidance only.
7.3.7 Temperature control valve (2V01)
The temperature control valve maintains desired oil temperature at the engine inlet, by directing
part of the oil flow through the bypass line instead of through the cooler. When using a
temperature control valve with wax elements, the set-point of the valve must be such that
55°C..58°C at the engine inlet is not exceeded. This means that the set-point should be e.g.
49°C. In which case of 49°C nominal, the valve starts to open at 43°C and at 55°C it is fully
open. If selecting a temperature control valve with wax elements that has a set-point of 57°C,
the valve may not be fully open until the oil temperature is e.g. 63°C, which is too high for the
engine at full load.
Design data:
56°CTemperature before engine, nom
1.0 MPa (10 bar)Design pressure
50 kPa (0.5 bar)Pressure drop, max
7.3.8 Automatic filter (2F02)
When off-engine main filter, 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)- automatic filter
35 µm (absolute)- insert filter
Max permitted pressure drops at 50 cSt:
30 kPa (0.3 bar )- clean filter
80 kPa (0.8 bar)- alarm
7-18 DBAD209883
Wärtsilä 46DF Product Guide7. Lubricating Oil System
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