WÄRTSILÄ Vasa R22, Instruction Manual

Page: 248 / 297

20. Exhaust System
20.1 Description
The exhaust pipes are cast of special alloy nodular cast iron, with
separate sections for each cylinder.
Metal bellows of the multiply type absorb heat expansion be-
tween the cylinder heads and the pipe system as well as between
the turbocharger and the pipe system.
All connections between pipes, expansion bellows, cylinder
heads and turbocharger are made with rigid flanges and gaskets.
The pipe system is supported and fixed by a bracket (5) but is
free to move axially in the supporting bracket (3). The disc springs
(2) maintain a positive force between the bracket and the pipe,
Fig 20-1.
The complete exhaust system is enclosed by an insulation box
built up of insulated sandwich steel sheets, flexibly mounted on
the engine structure. Mineral wool is used as insulating material.
The exhaust gas temperatures can be checked on local ther-
mometers after each cylinder. Sensors for remote measuring of
the temperature (or for the alarm system) can be mounted after
each cylinder as well as before and after the turbocharger.
Exhaust system
1 2 3
4
5 6
1
1. Flexible element
2. Disc spring
3. Supporting bracket
4. Cover
5. Bracket
6. Cover
Fig 20-1
2220519032
22-9601 Exhaust System 20
VASA 22 20 - 1