Wärtsilä Finland Oy
Power Plants
Doc id:
WDAAA299978 -
Date:
05-Nov-2003
Page:
12 (19)
Compressed Air
Pressure
Transmitter
1
2
3
Vent
Vent
Pressure
Switch
Figure 7
The shut-off valves with actuator (1), solenoid operated air valve (2) and solenoid operated vent
valve (3).
The GRU is equipped with two shut-off valves, installed in series. The valves are operated by admitting
compressed air into the actuator cylinders. The valves are closed by a spring when control voltage is cut off
and control air released from the actuator cylinders.
Gas trapped between the valves and in the pipe between the last shut off valve and the engine is vented to
the atmosphere through the solenoid operated vent valves (3). The vent valves V16 and V19 (additionally
V26 and V29 for PCC line) are closed as long as the operating voltage is applied. V14 (and V24 for PCC
line) is open as long as the operating voltage is applied. In running mode voltage is not applied to V14 and
the valve is closed.
Both the shut-off valves and the vent valves are operated by the PLC.
7.2.2 Function
Gas is mixed with the combustion air only in the intake channels in the cylinder head (see Figure 8). This
design ensures that only air is present in the charge air manifold, and thus the risk for explosions in the
engine’s charge air intake system is minimised.
Содержание 41508
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Страница 12: ...Appendix B Welding Precautions 200147...
Страница 22: ...Fuel Lubricating Oil Cooling Water 34SG 200303 03...
Страница 29: ...A Ap pp pe en nd di ix x A A E En nv vi ir ro on nm me en nt ta al l H Ha az za ar rd ds s 2 20 00 03 32 21 1...
Страница 73: ...Maintenance Tools 32 9801...
Страница 115: ...Engine Block with Bearings Cylinder and Oil Sump 34SG 9701...