WÄRTSILÄ 46F Series, Product Manual

Page: 97 / 208

lubricating oil pump. The suction pipe shall further be equipped with a non-return valve of flap
type without spring. The non-return valve is particularly important with engine driven pump
and it must be installed in such a position that self-closing is ensured.
Suction and return pipes of the separator must not be located close to each other in the tank.
The ventilation pipe from the system oil tank may not be combined with crankcase ventilation
pipes.
It must be possible to raise the oil temperature in the tank after a long stop. In cold conditions
it can be necessary to have heating coils in the oil tank in order to ensure pumpability. The
separator heater can normally be used to raise the oil temperature once the oil is pumpable.
Further heat can be transferred to the oil from the preheated engine, provided that the oil
viscosity and thus the power consumption of the pre-lubricating oil pump does not exceed
the capacity of the electric motor.
Fig 7-7 Example of system oil tank arrangement (DAAE007020e)
Design data:
see Technical data Oil tank volume
75...80% of tank volume Oil level at service
60% of tank volume Oil level alarm
DAAB605814 7-11
7. Lubricating Oil System Wärtsilä 46F Product Guide