Wartsila ?31DF Series Product Manual page 136

8. Compressed Air System
Fig 8-1
System components:
3E01
3F02
3N02
3N06
3P01
3S01
3T01
8.2.1 Starting air compressor unit (3N02)
At least two starting air compressors must be installed. It is recommended that the compressors
are capable of filling the starting air vessel from minimum (1.8 MPa) to maximum pressure in
15...30 minutes. For exact determination of the minimum capacity, the rules of the classification
societies must be followed.
8.2.2 Oil and water separator (3S01)
An oil and water separator should always be installed in the pipe between the compressor
and the air vessel. Depending on the operation conditions of the installation, an oil and water
separator may be needed in the pipe between the air vessel and the engine.
8.2.3 Starting air vessel (3T01)
The starting air vessels should be dimensioned for a nominal pressure of 3 MPa.
The number and the capacity of the air vessels for propulsion engines depend on the
requirements of the classification societies and the type of installation.
It is recommended to use a minimum air pressure of 1.8 MPa, when calculating the required
volume of the vessels.
8-2
External starting air system (DAAF301502)
Cooler (Starting air compressor unit)
Air filter (starting air inlet)
Starting air compressor unit
Air dryer unit
Compressor (starting air compressor unit)
Separator (starting air compressor unit)
Starting air vessel
Wärtsilä 31DF Product Guide
Pipe connections:
301 Starting air inlet
320 Instrument air inlet
Size
DN32
OD12
DBAE248994