WÄRTSILÄ 46DF, Руководство по эксплуатации продукта

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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 specification Fuel viscosity
150°C Design temperature
Equal to circulation pump capacity Design flow
1.6 MPa (16 bar) Design pressure
37
μ
m (mesh size) Filter fineness
Maximum permitted pressure drops at 14 cSt:
20 kPa (0.2 bar) - clean filter
80 kPa (0.8 bar) - alarm
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°C Design temperature
0.2...0.7 MPa (2...7 bar) Set-point (
Δ
p)
Pilot fuel feed pump, MDF (1P13)
The pilot fuel feed pump is needed in HFO installations. The pump feed the engine with MDF
fuel to the pilot fuel system. No HFO is allowed to enter the pilot fuel system.
It is recommended to use a screw pump as circulation pump. A suction strainer with a fineness
of 0.5 mm should be installed before each pump. There must be a positive static pressure of
about 30 kPa on the suction side of the pump.
Piping connecting one pilot fuel feed pump to multiple engines must secure equal flow
distribution.
Design data:
Allowed range at 2 cSt: 0.75…1.5 m3/h Capacity, one engine
Allowed range at 2 cSt: (0.85…1.5) x N m3/h Capacity, "N" engines
1.6 MPa (16 bar) Design pressure
1.0 MPa (10 bar) Max. total pressure (safety valve)
see chapter "Technical Data" Nominal pressure
6-46 DBAD209883
Wärtsilä 46DF Product Guide 6. Fuel System