Wartsila 31 Product Manual page 55

Wärtsilä 31 Product Guide
Fig 6-2
6.3.3.3 Separator feed pumps (1P02)
Feed pumps should be dimensioned for the actual fuel quality and recommended throughput
of the separator. The pump should be protected by a suction strainer (mesh size about 0.5
mm)
An approved system for control of the fuel feed rate to the separator is required.
Design data:
Design pressure
Design temperature
Viscosity for dimensioning electric motor
6.3.3.4 Separator pre-heater (1E01)
The pre-heater is dimensioned according to the feed pump capacity and a given settling tank
temperature.
The surface temperature in the heater must not be too high in order to avoid cracking of the
fuel. The temperature control must be able to maintain the fuel temperature within ± 2°C.
Wärtsilä 31 Product Guide - a1 - 18 October 2016
Fuel transfer and separating system (V76F6626F)
HFO MDF
0.5 MPa (5 bar) 0.5 MPa (5 bar)
100°C 50°C
1000 cSt 100 cSt
6. Fuel Oil System
6-11