This section is available on request - MAN Diesel & Turbo

MAN B&W Diesel A/S 7.05
Fuel oil filter
The filter can be of the manually cleaned duplex type
or an automatic filter with a manually cleaned bypass
filter.
If a double filter (duplex) <strong>is</strong> installed, it should have
sufficient capacity to allow the specified full amount
of oil to flow through each side of the filter at a given
working temperature with a max. 0.3 bar pressure
drop across the filter (clean filter).
If a filter with backflushing arrangement <strong>is</strong> installed,
the following should be noted. The required oil flow
specified in the ‘L<strong>is</strong>t of capacities’, i.e. the delivery
rate of the fuel oil supply pump and the fuel oil circulating
pump, should be increased by the amount
of oil used for the backflushing, so that the fuel oil
pressure at the inlet to the main engine can be maintained
during cleaning.
In those cases where an automatically cleaned filter
<strong>is</strong> installed, it should be noted that in order to
activate the cleaning process, certain makers of filters
require a greater oil pressure at the inlet to the
filter than the pump pressure specified. Therefore,
the pump capacity should be adequate for th<strong>is</strong> purpose,
too.
The fuel oil filter should be based on heavy fuel oil
of: 130 cSt at 80 °C = 700 cSt at 50 °C = 7000 sec
Redwood I/100 °F.
Fuel oil flow ........................ see ‘L<strong>is</strong>t of capacities’
Working pressure ......................................... 10 bar
Test pressure ...................... according to class rule
Absolute fineness ......................................... 50 µm
Working temperature ................. maximum 150 °C
Oil v<strong>is</strong>cosity at working temperature............ 15 cSt
Pressure drop at clean filter ....... maximum 0.3 bar
Filter to be cleaned at a pressure
drop at ........................................ maximum 0.5 bar
Note:
Absolute fineness corresponds to a nominal fineness
of approximately 30 µm at a retaining rate of
90%.
The filter housing shall be fitted with a steam jacket
for heat tracing.
Fuel oil venting box
Page 3 of 3
The design <strong>is</strong> shown on ‘Fuel oil venting box’, see
Fig. 7.05.02
S65ME-C, S60ME-C, L60ME-C/ME-GI 198 41 21-4.1
H4
H1 H2 H3
200
Top of fuel oil
service tank
H5
60
Vent pipe,
nominal: D3
Cone
Inlet pipe,
nominal: D2
Pipe,
nominal: D1
Outlet pipe,
nominal: D2
Flow m3 /h Dimensions in mm
Q (max.)* D1 D2 D3 H1 H2 H3 H4 H5
5.0 200 65 15 100 600 171.3 1,000 550
8.4 400 80 15 150 1,200 333.5 1,800 1,100
11.5 400 90 15 150 1,200 333.5 1,800 1,100
* The actual maximum flow of the fuel oil circulation pump
Fig. 07.05.02: Fuel oil venting box
Flushing of the fuel oil system
178 38 39-3.2
Before starting the engine for the first time, the system
on board has to be flushed in accordance with
MAN B&W’s recommendations ‘Flushing of Fuel Oil
System’ which <strong>is</strong> <strong>available</strong> on request.