WÄRTSILÄ 46DF, Руководство по эксплуатации продукта

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Fuel feed pump, booster unit (1P04)
The feed pump maintains the pressure in the fuel feed system. It is recommended to use a
screw pump as feed pump. The capacity of the feed pump must be sufficient to prevent
pressure drop during flushing of the automatic filter.
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.
Design data:
Total consumption of the connected engines added with
the flush quantity of the automatic filter (1F08) and 15%
margin.
Capacity
1.6 MPa (16 bar) Design pressure
0.7 MPa (7 bar) Max. total pressure (safety valve)
100°C Design temperature
1000 cSt Viscosity for dimensioning of electric motor
Pressure control valve, booster unit (1V03)
The pressure control valve in the feeder/booster unit maintains the pressure in the de-aeration
tank by directing the surplus flow to the suction side of the feed pump.
Design data:
Equal to feed pump Capacity
1.6 MPa (16 bar) Design pressure
100°C Design temperature
0.3...0.5 MPa (3...5 bar) Set-point
Automatic filter, booster unit (1F08)
It is recommended to select an automatic filter with a manually cleaned filter in the bypass
line. The automatic filter must be installed before the heater, between the feed pump and the
de-aeration tank, and it should be equipped with a heating jacket. Overheating (temperature
exceeding 100°C) is however to be prevented, and it must be possible to switch off the heating
for operation on MDF.
Design data:
According to fuel specification Fuel viscosity
100°C Design temperature
If fuel viscosity is higher than 25 cSt/100°C Preheating
Equal to feed pump capacity Design flow
1.6 MPa (16 bar) Design pressure
Fineness:
35
μ
m (absolute); 20
μ
m ß20=10, ISO16889 - automatic filter
35
μ
m (mesh size) - by-pass filter
Maximum permitted pressure drops at 14 cSt:
DBAD209883 6-43
6. Fuel System Wärtsilä 46DF Product Guide