- Not needed
- Required
Frequency converter:
- HFO engines
- Bi - fuel engines
1.6 MPa (16 bar)Design pressure
150°CDesign temperature
Pressure for dimensioning of electric motor
(ΔP):
0.3 MPa (3 bar)- if all fuel is fed through feeder/booster unit
500 cStViscosity for dimensioning of electric motor
Safety filter (1F03)
The safety filter is a full flow duplex type filter with steel net. The filter should be equipped with
a heating jacket. The safety filter or pump and filter unit shall be installed as close as possible
to the engine.
Design data:
according to fuel specificationFuel viscosity
150°CDesign temperature
Equal to circulation pump capacityDesign flow
1.6 MPa (16 bar)Design pressure
37 μm (absolute mesh size)Filter fineness
Maximum permitted pressure drops at 14 cSt:
20 kPa (0.2 bar)- clean filter
80 kPa (0.8 bar)- alarm
6.3.6.6 Overflow valve, HFO (1V05)
When several engines are connected to the same feeder/booster unit an overflow valve is
needed between the feed line and the return line. The overflow valve limits the maximum
pressure in the feed line, when the fuel lines to a parallel engine are closed for maintenance
purposes.
The overflow valve should be dimensioned to secure a stable pressure over the whole operating
range.
Design data:
Equal to circulation pump (1P06)Capacity
1.6 MPa (16 bar)Design pressure
150°CDesign temperature
0.2...0.7 MPa (2...7 bar)Set-point (Δp)
6.3.7 Flushing
The external piping system must be thoroughly flushed before the engines are connected and
fuel is circulated through the engines. The piping system must have provisions for installation
of a temporary flushing filter.
6-28 DAAB605814
Wärtsilä 46F Product Guide6. Fuel Oil System
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