Man B&W S50MC-C8-TII User Manual

MAN B&W 8.05
Page  of 3
MAN Diesel
MAN B&W L60MC-C7/8, L60MEC7/8, S50MC-C7/8,
S50MEC7/8, S50ME-B8/9
198 42 424.5
Components for Lubricating Oil System
Lubricating oil pump
The lubricating oil pump can be of the displace-
ment wheel, or the centrifugal type:
Lubricating oil viscosity, specied...75 cSt at 50 °C
Lubricating oil viscosity .......... maximum 400 cSt *
Lubricating oil ow ..............see ‘List of capacities’
Design pump head ....................................... 4. bar
Delivery pressure ......................................... 4. bar
Max. working temperature ............................. 70 °C
* 400cStisspecied,asitisnormalpracticewhen
startingoncoldoil,topartlyopenthebypass
valvesofthelubricatingoilpumps,soastoreduce
theelectricpowerrequirementsforthepumps.
The ow capacity must be within a range from
00 to 2% of the capacity stated.
The pump head is based on a total pressure drop
across cooler and lter of maximum  bar.
Referring to Fig. 8.0.0, the bypass valve shown
between the main lubricating oil pumps may be
omitted in cases where the pumps have a builtin
bypass or if centrifugal pumps are used.
If centrifugal pumps are used, it is recommended
to install a throttle valve at position ‘005’ to prevent
an excessive oil level in the oil pan if the centrifugal
pump is supplying too much oil to the engine.
During trials, the valve should be adjusted by
means of a device which permits the valve to be
closed only to the extent that the minimum ow
area through the valve gives the specied lubri-
cating oil pressure at the inlet to the engine at full
normal load conditions. It should be possible to
fully open the valve, e.g. when starting the engine
with cold oil.
It is recommended to install a 25 mm valve (pos.
006), with a hose connection after the main lubri-
cating oil pumps, for checking the cleanliness of
the lubricating oil system during the ushing pro-
cedure. The valve is to be located on the under-
side of a horizontal pipe just after the discharge
from the lubricating oil pumps.
Lubricating oil cooler
The lubricating oil cooler must be of the shell and
tube type made of seawater resistant material, or
a plate type heat exchanger with plate material
of titanium, unless freshwater is used in a central
cooling water system.
Lubricating oil viscosity, specied...75 cSt at 50 °C
Lubricating oil ow ..............see ‘List of capacities’
Heat dissipation .................. see ‘List of capacities’
Lubricating oil temperature, outlet cooler ...... 45 °C
Working pressure on oil side ....................... 4. bar
Pressure drop on oil side ............maximum 0.5 bar
Cooling water ow ..............see ‘List of capacities’
Cooling water temperature at inlet:
seawater ......................................................... 32 °C
freshwater ....................................................... 36 °C
Pressure drop on water side .......maximum 0.2 bar
The lubricating oil ow capacity must be within a
range from 00 to 2% of the capacity stated.
The cooling water ow capacity must be within a
range from 00 to 0% of the capacity stated.
To ensure the correct functioning of the lubricat-
ing oil cooler, we recommend that the seawater
temperature is regulated so that it will not be
lower than 0 °C.
The pressure drop may be larger, depending on
the actual cooler design.
Lubricating oil temperature control valve
The temperature control system can, by means of
a threeway valve unit, bypass the cooler totally
or partly.
Lubricating oil viscosity, specied ....75 cSt at 50 °C
Lubricating oil ow ..............see ‘List of capacities’
Temperature range, inlet to engine .........40  47 °C

Man B&W S50MC-C8-TII Specifications

General

Brand	Man
Model	B&W S50MC-C8-TII
Category	Engine
Language	English