WÄRTSILÄ 46DF, Product Manual

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20 kPa (0.2 bar) - clean filter
80 kPa (0.8 bar) - alarm
Flow meter, booster unit (1I01)
If a fuel consumption meter is required, it should be fitted between the feed pumps and the
de-aeration tank. When it is desired to monitor the fuel consumption of individual engines in
a multiple engine installation, two flow meters per engine are to be installed: one in the feed
line and one in the return line of each engine.
There should be a by-pass line around the consumption meter, which opens automatically in
case of excessive pressure drop.
If the consumption meter is provided with a prefilter, an alarm for high pressure difference
across the filter is recommended.
De-aeration tank, booster unit (1T08)
It shall be equipped with a low level alarm switch and a vent valve. The vent pipe should, if
possible, be led downwards, e.g. to the overflow tank. The tank must be insulated and equipped
with a heating coil. The volume of the tank should be at least 100 l.
Circulation pump, booster unit (1P06)
The purpose of this pump is to circulate the fuel in the system and to maintain the required
pressure at the injection pumps, for single-engine circuit, or before circulation pumps (1P12)
for multi-engines circuit. Pressure is stated in the chapter Technical data. By circulating the
fuel in the system it also maintains correct viscosity, and keeps the piping and the injection
pumps at operating temperature.
Design data:
Capacity:
LFO:2cSt HFO:20cSt
- single engine, without circulation pumps
(1P12)
15% more than total capacity of all circulation pumps - with circulation pumps (1P12)
Frequency Converter:
Not needed
- HFO/ Gas single engine, without circulation
pumps (1P12)
Required
- Tri-fuel single engine, without circulation
pumps (1P12)
Not needed on 1P06 - with circulation pumps (1P12)
1.6 MPa (16 bar) Design pressure:
10 MPa with 1P12
12 MPa without 1P12
Max. total pressure (safety valve)
150°C Design temperature
500cSt Viscosity for dimensioning of electric motor
Heater, booster unit (1E02)
The heater must be able to maintain a fuel viscosity of 14 cSt at maximum fuel consumption,
with fuel of the specified grade and a given day tank temperature (required viscosity at injection
6-44 DBAD209883
Wärtsilä 46DF Product Guide 6. Fuel System