WÄRTSILÄ VASA 6L32, Instruction Manual

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in series. Alternatively the main and stand-by separators may
be run in parallel, but this makes heavier demands on correct
gravity disc choice and constant flow and temperature con-
trol to achieve optimum results. Flow rate through the centri-
fuges should not exceed the maximum fuel consumption by
more than 10 %.
·
Sufficient heating capacity to keep centrifuging and injection
temperatures at recommended levels. It is important that the
temperature fluctuations are as low as possible (
±
2 °C before
centrifuge) when centrifuging high viscosity fuels with densities
approaching or exceeding 991 kg/m
3
at 15 °C.
·
Sufficient preheating of the engine and the fuel systems before
starting the engine.
·
Keeping fuel injection equipment and the inverse cooling
system in good condition.
See also section 02.2.7., Handling of oil samples.
02.2 Lubricating oil
02.2.1 System oil characteristics
Viscosity. Viscosity class SAE 40. In WÄRTSILÄ
®
Vasa 32 engine type
also the use of SAE 30 class lubricating oil is allowed.
Viscosity Index (VI). Min.95 .
Alkalinity (BN). The required lubricating oil alkalinity is tied to the fuel
specified for the engine.
Fuel standards and lubricating oil requirements
Category Fuel standard Lube oil BN
A
ASTM D 975-94
ISO 8217: 1996(E)
BS MA 100:1996
CIMAC 1990 GRADE 1D, 2D
DMX, DMA
DMX, DMA
DX, DA
10 - 30
B
ASTM D 975-94
ISO 8217: 1996(E)
BS MA 100:1996
CIMAC 1990 GRADE 4D
DMB
DMB
DB
15 - 30
C
ASTM D 396-94
ISO 8217: 1996(E)
BS MA 100:1996
CIMAC 1990 GRADE No. 4-6
DMC, RMA10-RMK55
DMC, RMA10-RMK55
DC, A10-K55
30 - 55
D
CRUDE OIL
(CRO)
30
It is recommended to use in the first place BN 50-55 lubricants when
operating on heavy fuel. This recommendation is valid especially
for engines having wet lubricating oil sump and using heavy fuel
with sulphur contents above 2.0 % mass. BN 40 lubricants can be
used when operating on heavy fuel as well if experience shows that
the lubricating oil BN equilibrium remains at an acceptable level.
Fuel, Lubricating Oil, Cooling Water 200549-01
02 - 12 W20/W32/W46, W46F, 32, 32LN