WinGD X72DF - Main Lubricating Oil System Components

Marine Installation Manual 2021-08 4-18
4 Ancillary Systems
4.3 Lubricating oil systems
X72DF
Main lubricating oil system components
Lubricating oil pump
Positive displacement screw pumps with built-in safety valves, or centrifugal
pumps (for pump capacities refer to GTD):
Lubricating oil cooler
Type: Positive displacement
screw pump
The flow rate is to be within a tolerance of 0 to + 10 % of
the GTD value, plus:
- back-flushing flow of automatic self-cleaning filter, if such
filter is installed
- oil flow to torsional vibration damper, if such damper is
installed
Type: Centrifugal pump The flow rate is to be within a tolerance of - 10 to +10 % of
the GTD value, plus:
- back-flushing flow of automatic self-cleaning filter, if such
filter is installed
- oil flow to torsional vibration damper, if such damper is
installed
Delivery head The final delivery head to be determined is subject to the
actual piping layout.
Working temperature 60 °C
Oil type SAE30, 50 cSt at working temperature; when sizing the
pump motor the maximum viscosity to be allowed for is
400 cSt.
Type Plate or tubular
Cooling medium Freshwater
Cooling water flow Refer to GTD.
Cooling water temperature 36 °C
Heat dissipation Refer to GTD.
Margin for fouling 10-15% to be added
Oil flow Refer to GTD.
Oil viscosity at cooler inlet 50 cSt at 60°C
Oil temperature at inlet Approx. 60 °C
Oil temperature at outlet 45 °C
Working pressure oil side 6bar
Working pressure water side Approx. 3 bar