8.3
External compressed air system
The design of the starting air system is partly determined by classification regulations. Most
classification societies require that the total capacity is divided into two equally sized starting
air receivers and starting air compressors. The requirements concerning multiple engine
installations can be subject to special consideration by the classification society.
The starting air pipes should always be slightly inclined and equipped with manual or automatic
draining at the lowest points.
Instrument air to safety and control devices must be treated in an air dryer.
Fig 8-3
Example of external compressed air system (3V76H4173D)
Pipe connections
System components
Starting air inlet, 3 MPa
301
Air filter (starting air inlet)
3F02
Control air inlet, 3 MPa
302
Starting air compressor unit
3N02
Driving air to oil mist detector, 0.8 MPa
303
Starting air receiver
3T01
Control air to bypass / wastegate valve, 0.8 MPa
311
Air supply to turbine and compressor cleaning unit (ABB TC)
314
8.3.1
Starting air compressor unit (3N02)
At least two starting air compressors must be installed. It is recommended that the compressors
are capable of filling the starting air vessel from minimum (1.8 MPa) to maximum pressure in
15...30 minutes. For exact determination of the minimum capacity, the rules of the classification
societies must be followed.
8-4
Wärtsilä 50DF Product Guide - a16 - 9 September 2016
Wärtsilä 50DF Product Guide
8. Compressed Air System
Summary of Contents for WARTSILA 50DF
Page 1: ...WÄRTSILÄ 50DF PRODUCT GUIDE ...
Page 14: ...This page intentionally left blank ...
Page 40: ...This page intentionally left blank ...
Page 58: ...This page intentionally left blank ...
Page 102: ...This page intentionally left blank ...
Page 120: ...This page intentionally left blank ...
Page 154: ...This page intentionally left blank ...
Page 164: ...This page intentionally left blank ...
Page 176: ...This page intentionally left blank ...
Page 214: ...This page intentionally left blank ...
Page 232: ...This page intentionally left blank ...
Page 234: ...This page intentionally left blank ...
Page 237: ......
Page 238: ......
Page 239: ......