WÄRTSILÄ 46F Series, Product Manual

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11.3.7.4 Conventional exhaust gas silencer (5R02)
Yard/designer should take into account that unfavourable layout of the exhaust system (length
of straight parts in the exhaust system) might cause amplification of the exhaust noise between
engine outlet and the silencer. Hence the attenuation of the silencer does not give any absolute
guarantee for the noise level after the silencer.
When included in the scope of supply, the standard silencer is of the absorption type, equipped
with a spark arrester. It is also provided with a soot collector and a condense drain, but it
comes without mounting brackets and insulation. The silencer can be mounted either
horizontally or vertically.
The noise attenuation of the standard silencer is either 25 or 35 dB(A). This attenuation is valid
up to a flow velocity of max. 40 m/s.
Fig 11-7 Exhaust gas silencer
Table 11-1 Typical dimensions of exhaust gas silencers
Attenuation: 35 dB(A) Attenuation: 25 dB(A)
ØD
[mm]
C [mm] B [mm] A [mm] NS
Weight [kg] L [mm] Weight [kg] L [mm]
2900 6870 2295 5360 1800 2240 1190 860 900
3730 7620 2900 5880 1900 2340 1280 870 1000
4780 8200 3590 6200 2100 2600 1340 900 1100
6540 9500 4980 7500 2300 2650 1440 950 1300
7120 10165 5800 8165 2400 2680 1490 950 1400
7650 10165 6180 8165 2500 2680 1540 1000 1500
Flanges: DIN 2501
11-10 DAAB605814
Wärtsilä 46F Product Guide 11. Exhaust Gas System