5.4.3 Control air supply
The control air supply supplies control air to the engine. The plant supply systems supply
compressed air with the specified properties at the two engine connections that follow:
•
Connection 45 (control air supply inlet) for usual supply
•
Connection 40 (Starting air pipe inlet) for stand-by supply.
The pressure reducing valves (008, Figure 5-27) and (009) decrease the pressure of the
compressed air to the set values. If the plant supply system for control air becomes defective,
the supply changes over to stand-by supply. The non-return valves (007) and (010) control the
automatic change over of the compressed air supply.
Fig 5-27 Control air supply (generic)
003
004
005
006
007008
009
010
011
012
001
002
Legend
001 Pressure transmitter PT4411A 007 Non-return valve 35-342HA
002 Pressure transmitter PT4401A 008 Pressure reducing valve 35-23HA
003 Pressure gauge PI4401L 009 Pressure reducing valve 35-19HA
004 3/2-way valve 35-36HB (connection point A1) 010 Non-return valve 35-342HB
005 3/2-way valve 35-36HC (connection point A2) 011 Air filter 35-351HA
006 3/2-way valve 35-36HA (connection point A6) 012 Pressure gauge PI4411L
X92DF
AA00-4605-00AAA-043A-A
Operation Manual Control air supply
Winterthur Gas & Diesel Ltd.
- 196 - Issue 002 2020-08
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