WÄRTSILÄ VASA 6L32, Instruction Manual

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8 Check that the O-ring (35)
of the valve housing are in-
tact. Lubricate with oil.
9 Check that the steel sealing (36) is intact
and in position,
when mounting the valve into the cylinder head.
10 Tighten the valve
to torque stated in chapter 07.
21.5 Starting air vessel and piping
The starting air system is designed to prevent explosions.
An oil and water separator as well as a non-return valve should
be located in the feed pipe, between the compressor and the
starting air vessel. At the lowest position of the piping there
should be a drain valve. Immediately before the main starting
valve on the engine, a non-return valve and a blow-off valve are
mounted.
Drain the starting air vessel from condensate through the drain
valve before starting.
The piping between the air vessels and the engines should be
carefully cleaned when installing. Also later on they should be
kept free from dirt, oil and condensate.
The starting air vessels should be inspected and cleaned regu-
larly. If possible, they should then be coated with a suitable
anti-corrosive agent. Let them dry long enough.
At the same time, inspect the valves of the starting air vessels.
Too strong tightening may result in damages on the seats, which
in turn cause leakage. Leaky and worn valves, including safety
valves, should be reground. Test the safety valves under pressure.
21.6 Pneumatic system
21.6.1 General description
The engine is equipped with a pneumatic system for control of the
following functions by means of two solenoid valves:
·
start of the engine,
·
stop of the engine,
The system includes a vessel (45) and a non-return valve (46) to
ensure the pressure in the system in case of lacking feed pressure.
The main starting valve (4), which is described in detail in
section 21.2, is actuated by the solenoid valve (43) at remote start.
Fig 21-5 shows the solenoid valve. The valve is equipped with a
push button and can be energized manually.
The pneumatic overspeed trip devices (42), described in detail
in chapter 22., section 22.6, are controlled by the solenoid valve
(44) which is actuated by the electric signal from the speed
monitoring system, whereby the engine stops.
21 Starting Air System 32-200202-01
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