Fig 8-4 Starting air vessel
Weight
[kg]
Dimensions [mm]Size
[Litres]
DL3
1)
L2
1)
L1
4504801332433204500
81065013325535601000
98080013325529301250
115080013325534601500
131080013325540001750
149080013325546102000
1)
Dimensions are approximate.
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 starting air vessel volume can be calculated using the formula:
where:
total starting air vessel volume [m
3
]V
R
=
normal barometric pressure (NTP condition) = 0.1 MPap
E
=
air consumption per start [Nm
3
] See Technical dataV
E
=
required number of starts according to the classification societyn =
maximum starting air pressure = 3 MPap
Rmax
=
minimum starting air pressure = See Technical datap
Rmin
=
NOTE
The total vessel volume shall be divided into at least two equally sized starting air
vessels.
8-6 Wärtsilä 46F Product Guide - a19 - 1 December 2017
Wärtsilä 46F Product Guide8. Compressed Air System
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