WÄRTSILÄ WARTSILA32, Product Manual, Page: 127 / 254

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 Air vessels (3T01 & 3T05)
The 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 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.
Fig 8-6 Air vessel
Weight
[kg]
Dimensions [mm] Size
[Litres]
D L3 1) L2 1) L1
274 480 110 243 1767 250
450 480 133 243 3204 500
625 650 133 255 2740 710
810 650 133 255 3560 1000
980 800 133 255 2930 1250
1) Dimensions are approximate.
8.3.3.1 Starting air vessel (3T01)
The starting air consumption stated in technical data is for a successful start. During start the
main starting valve is kept open until the engine starts, or until the max. time for the starting
attempt has elapsed. A failed start can consume two times the air volume stated in technical
data. If the ship has a class notation for unattended machinery spaces, then the starts are to
be demonstrated.
The required total air vessel volume can be calculated using the formula:
Wärtsilä 32 Product Guide - a21 - 7 September 2016 8-7
8. Compressed Air System Wärtsilä 32 Product Guide