MAN B&W
7.05
Page 1 of 3
MAN Diesel
MAN B&W MC/MC-C, ME/MEC/ME-B/GI engines
198 39 512.8
Components for Fuel Oil System
Fuel oil centrifuges
The manual cleaning type of centrifuges are
not to be recommended. Centrifuges must be
selfcleaning, either with total discharge or with
partial discharge.
Distinction must be made between installations
for:
• Specific gravities < 0.991 (corresponding to ISO
8217 and British Standard 6843 from RMA to
RMH, and CIMAC from A to Hgrades
• Specific gravities > 0.991 and (corresponding to
CIMAC Kgrades).
For the latter specific gravities, the manufacturers
have developed special types of centrifuges, e.g.:
Alfa Laval ........................................................Alcap
Westfalia ....................................................... Unitrol
Mitsubishi .............................................. EHidens II
The centrifuge should be able to treat approxi-
mately the following quantity of oil:
0.23 litres/kWh
This figure includes a margin for:
• Water content in fuel oil
• Possible sludge, ash and other impurities in the
fuel oil
• Increased fuel oil consumption, in connection
with other conditions than ISO standard condition
• Purifier service for cleaning and maintenance.
The size of the centrifuge has to be chosen ac-
cording to the supplier’s table valid for the select-
ed viscosity of the Heavy Fuel Oil. Normally, two
centrifuges are installed for Heavy Fuel Oil (HFO),
each with adequate capacity to comply with the
above recommendation.
A centrifuge for Marine Diesel Oil (MDO) is not a
must. However, MAN Diesel & Turbo recommends
that at least one of the HFO purifiers can also
treat MDO.
If it is decided after all to install an individual puri-
fier for MDO on board, the capacity should be
based on the above recommendation, or it should
be a centrifuge of the same size as that for HFO.
The
Nominal MCR
is used to determine the to-
tal installed capacity. Any derating can be taken
into consideration in borderline cases where the
centrifuge that is one step smaller is able to cover
Specified MCR
.
Fuel oil supply pump
This is to be of the screw or gear wheel type.
Fuel oil viscosity, specified .... up to 700 cSt at 50 °C
Fuel oil viscosity maximum ......................1,000 cSt
Pump head ......................................................4 bar
Fuel oil flow ........................ see ‘List of Capacities’
Delivery pressure ............................................4 bar
Working temperature ................................... 100 °C
Minimum temperature .................................... 50 °C
The capacity stated in ‘List of Capacities’ is to be ful-
filled with a tolerance of: ÷0% to +15% and shall also
be able to cover the backflushing, see ‘Fuel oil filter’.
Fuel oil circulating pump
This is to be of the screw or gear wheel type.
Fuel oil viscosity, specified .... up to 700 cSt at 50 °C
Fuel oil viscosity normal ................................20 cSt
Fuel oil viscosity maximum ......................1,000 cSt
Fuel oil flow ........................ see ‘List of Capacities’
Pump head ......................................................6 bar
Delivery pressure .......................................... 10 bar
Working temperature ................................... 150 °C
The capacity stated in ‘List of Capacities’ is to be ful-
filled with a tolerance of: ÷0% to +15% and shall also
be able to cover the backflushing, see ‘Fuel oil filter’.
Pump head is based on a total pressure drop in
filter and preheater of maximum 1.5 bar.
Summary of Contents for B&W S50ME-B9.3-TII
Page 4: ......
Page 10: ......
Page 11: ...MAN B W MAN Diesel Engine Design 1 ...
Page 12: ......
Page 27: ...MAN B W MAN Diesel Engine Layout and Load Diagrams SFOC 2 ...
Page 28: ......
Page 53: ...MAN B W MAN Diesel Turbocharger Selection Exhaust Gas By pass 3 ...
Page 54: ......
Page 58: ......
Page 59: ...MAN B W MAN Diesel Electricity Production 4 ...
Page 60: ......
Page 92: ......
Page 93: ...MAN B W MAN Diesel Installation Aspects 5 ...
Page 94: ......
Page 124: ......
Page 133: ...MAN B W MAN Diesel List of Capacities Pumps Coolers Exhaust Gas 6 ...
Page 134: ......
Page 154: ......
Page 155: ...MAN B W MAN Diesel Fuel 7 ...
Page 156: ......
Page 170: ......
Page 171: ...MAN B W MAN Diesel Lubricating Oil 8 ...
Page 172: ......
Page 188: ......
Page 189: ...MAN B W MAN Diesel Cylinder Lubrication 9 ...
Page 190: ......
Page 199: ...MAN B W MAN Diesel Piston Rod Stuffing Box Drain Oil 10 ...
Page 200: ......
Page 202: ......
Page 203: ...MAN B W MAN Diesel Central Cooling Water System 11 ...
Page 204: ......
Page 209: ...MAN B W MAN Diesel Seawater Cooling System 12 ...
Page 210: ......
Page 220: ......
Page 221: ...MAN B W MAN Diesel Starting and Control Air 13 ...
Page 222: ......
Page 227: ...MAN B W MAN Diesel Scavenge Air 14 ...
Page 228: ......
Page 239: ...MAN B W MAN Diesel Exhaust Gas 15 ...
Page 240: ......
Page 254: ......
Page 255: ...MAN B W MAN Diesel Engine Control System 16 ...
Page 256: ......
Page 265: ...MAN B W MAN Diesel Vibration Aspects 17 ...
Page 266: ......
Page 280: ......
Page 281: ...MAN B W MAN Diesel Monitoring Systems and Instrumentation 18 ...
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Page 307: ...MAN B W MAN Diesel Dispatch Pattern Testing Spares and Tools 19 ...
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Page 322: ......
Page 323: ...MAN B W MAN Diesel Project Support and Documentation 20 ...
Page 324: ......
Page 332: ......
Page 333: ...MAN B W MAN Diesel Appendix A ...
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