Wartsila 31 Product Manual page 67

Wärtsilä 31 Product Guide
where:
Viscosimeter, booster unit (1I02)
The heater is to be controlled by a viscosimeter. The viscosimeter should be of a design that
can withstand the pressure peaks caused by the injection pumps of the diesel engine.
Design data:
Operating range
Design temperature
Design pressure
6.3.5.4 Overflow valve, HFO (1V05)
When several engines are connected to the same feeder/booster unit an overflow valve is
needed between the feed line and the return line. The overflow valve limits the maximum
pressure in the feed line, when the fuel lines to a parallel engine are closed for maintenance
purposes.
The overflow valve should be dimensioned to secure a stable pressure over the whole operating
range.
Design data:
Capacity
Design pressure
Design temperature
Wärtsilä 31 Product Guide - a1 - 18 October 2016
P = heater capacity (kW)
Q = total fuel consumption at full output + 15% margin [l/h]
ΔT = temperature rise in heater [°C]
0...50 cSt
180°C
4 MPa (40 bar)
Equal to circulation pump (1P06)
1.6 MPa (16 bar)
150°C
6. Fuel Oil System
6-23