Wartsila ?31DF Series User Manual

● DMA: A high quality distillate, generally designated MGO (Marine Gas Oil) in the marine
field.
● DFA: A similar quality distillate fuel compared to DMA category fuels but a presence of
max. 7,0 % v/v of Fatty acid methyl ester (FAME) is allowed.
● DMZ: A high quality distillate, generally designated MGO (Marine Gas Oil) in the marine
field. An alternative fuel grade for engines requiring a higher fuel viscosity than specified
for DMA grade fuel.
● DFZ: A similar quality distillate fuel compared to DMZ category fuels but a presence of
max. 7,0 % v/v of Fatty acid methyl ester (FAME) is allowed.
● DMB: A general purpose fuel which may contain trace amounts of residual fuel and is
intended for engines not specifically designed to burn residual fuels. It is generally
designated MDO (Marine Diesel Oil) in the marine field.
● DFB: A similar quality distillate fuel compared to DMB category fuels but a presence of
max. 7,0 % v/v of Fatty acid methyl ester (FAME) is allowed.
For maximum fuel temperature before the engine, see the Installation Manual.
Table 6-2 Light fuel oils
Test method(s)
and references
Category ISO-F
Lim-
it
UnitCharacteristics
DFBDMBDFZDMZDFADMADMX
ISO 3104
11,006,0006,0005,500Max
mm
2
/s
a)
Kinematic viscosity at 40
°C
i)
2,0003,0002,000
1,400
i)
Min
ISO 3675 or ISO
12185
900,0890,0890,0-Maxkg/m³Density at 15 °C
ISO 426435404045MinCetane index
ISO 8754 or ISO
14596, ASTM
D4294
1,501,001,001,00Max% m/m
Sulphur
b, j)
ISO 271960,060,060,0
43,0
k)
Min°CFlash point
IP 5702,002,002,002,00Maxmg/kgHydrogen sulfide
ASTM D6640,50,50,50,5Max
mg
KOH/g
Acid number
ISO 10307-1
0,10
c)
---Max% m/m
Total sediment by hot fil-
tration
ISO 12205
25
d)
252525Maxg/m³Oxidation stability
ASTM D7963 or IP
579
7,0-7,0-7,0--Max% v/v
Fatty acid methyl ester
(FAME)
e)
ISO 10370-0,300,300,30Max% m/m
Carbon residue – Micro
method
On 10% distillation
residue
ISO 103700,30---Max% m/m
Carbon residue – Micro
method
ISO 3015
-ReportReport-16
Max°C
winter
Cloud point
f)
----16summer
IP 309 or IP 612
-ReportReport-
Max°C
winter
Cold filter
plugging point
f)
----summer
6-2 DBAE248994
Wärtsilä 31DF Product Guide6. Fuel Oil System

Wartsila ?31DF Series Specifications

General

Brand	Wartsila
Model	?31DF Series
Category	Engine
Language	English