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 (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
6.3.5.6
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°C
Design temperature
0.2...0.7 MPa (2...7 bar)
Set-point (
Δ
p)
6.3.6
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.
The fuel pipes at the engine (connections 101 and 102) are disconnected and the supply and
return lines are connected with a temporary pipe or hose on the installation side. All filter
inserts are removed, except in the flushing filter of course. The automatic filter and the
viscosimeter should be bypassed to prevent damage. The fineness of the flushing filter should
be 35
μ
m or finer.
Wärtsilä 46F Product Guide - a19 - 1 December 2017
6-25
6. Fuel Oil System
Wärtsilä 46F Product Guide
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