Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
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008831 en 2020.10
Technical description
4.2 Marine application
When installing a unit on a ship, the behaviour of the ship at sea must be taken into consideration
and thus the inclination of the unit.
The compressor unit is designed to meet the most common requirements from the classification
companies assuming the unit is installed with the motor/compressor shaft in the fore-and-aft di-
rection of the ship, see Fig. 14 and Fig. 15. (A larger inclination of the unit in this direction will
cause problems with the oil separator in terms of oil level shutdown for instance).
The requirements are stated in Table 4.
Fig. 14: Front of unit - athwartships Fig. 15: Side of unit - fore-and-aft
Athwartships Fore-and-aft direction
Axial
(rotation around motor/compressor
shaft axis)
Transversal
(rotation around axis
perpendicular to motor/compressor shaft)
Static Dynamic Static Dynamic
15 ± 22.5
5 ± 7.5
Table 4
Depending on their purposes, the units will have different motors, oil coolers, etc. and therefore
the centre of gravity may vary a lot.
We strongly recommend checking the centre of gravity and the tipping angle of the ac-
tual unit.
If the tipping angle is too small, precautions must be taken to ensure the unit is safe.
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