Table 8-1
Recommended main starting air pipe size
Size
Engine
DN65
6L, 7L
DN80
8L, 9L, 12V
DN100
14V, 16V
8.3.1
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.
8.3.2
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.
8.3.3
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.
The starting air vessels are to be equipped with at least a manual valve for condensate drain.
If the air vessels are mounted horizontally, there must be an inclination of 3...5° towards the
drain valve to ensure efficient draining.
Wärtsilä 46F Product Guide - a19 - 1 December 2017
8-5
8. Compressed Air System
Wärtsilä 46F Product Guide
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