WÄRTSILÄ Vasa R22, Инструкция по эксплуатации, Страница: 22 / 297

Rated capacity of the centrifuge may be used provided the fuel
viscosity is less than 12 cSt at centrifuging temperature.
Marine Gas Oil viscosity is normally less than 12 cSt at 15°C.
02.1.2.2 Heating
See diagram, Fig 02-1. Keep the fuel temperature about 10°C
above the minimum storage temperature indicated in the dia-
gram in order to minimize the risk for wax formation and the
temperature after the final heater 5 to 10°C above the recom-
mended temperature before injection pumps to compensate for
heat losses between heater and engine.
Fuel oil viscosity-temperature diagram
Example: A fuel oil with a viscosity of 380 cSt (A) at 50°C (B) or
80°C (C) must be preheated to 115-130° C (D-E) before the fuel
injection pumps, to 98°C (F) at the centrifuge and to minimum
40°C (G) in storage tanks. The fuel oil may not be pump able below
36°C (H).
To obtain temperatures for intermediate viscosities, draw a line
from the known viscosity/temperature point in parallel to the
nearest viscosity/temperature line in diagram.
°C
-10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
3
4
5
6
7
8
9
10
12
14
16
20
25
30
40
50
60
80
100
200
300
400
600
1000
2000
5000
Centistokes
F
D
E
C
K
B
G
H
A
14 cSt at 40 °C
GAS OIL
MARINE DIESEL OIL
11 cSt at 40 °C
5.5 cSt at 40 °C
APPROX. PUMPING LIMIT
VISCOSITY BEFORE
80 cSt at 50 °C
180 cSt at 50 °C
380 cSt at 50 °C
700 cSt at 50 °C
40 cSt at 50 °C
FUEL PUMPS
CENTRIFUGING
TEMPERATURE
TEMPERATURE
MINIMUM STORAGE
MAX. TEMP
RECOMMENDED
Fig 02-1
2202529426
02 Fuel, Lubricating Oil, Cooling Water 22-9601
02 - 2 VASA 22