Specification of compressed air
General
For compressed air quality observe the ISO 8573-1:2010. Compressed air
must be free of solid particles and oil (acc. to the specification).
Requirements
The starting air must fulfil at least the following quality requirements accord-
ing to ISO 8573-1:2010.
Purity regarding solid particles
Particle size > 40µm
Quality class 6
max. concentration < 5 mg/m
3
Purity regarding moisture
Residual water content
Quality class 7
< 0.5 g/m
3
Purity regarding oil Quality class X
Additional requirements are:
▪ The air must not contain organic or inorganic silicon compounds.
▪ The layout of the starting air system must ensure that no corrosion may
occur.
▪ The starting air system and the starting air receiver must be equipped
with condensate drain devices.
▪ By means of devices provided in the starting air system and via mainte-
nance of the system components, it must be ensured that any hazard-
ous formation of an explosive compressed air/lube oil mixture is preven-
ted in a safe manner.
Please note that control air will be used for the activation of some safety
functions on the engine – therefore, the compressed air quality in this system
is very important.
Control air must meet at least the following quality requirements according to
ISO 8573-1:2010.
▪ Purity regarding solid particles
Quality class 5
▪ Purity regarding moisture
Quality class 4
▪ Purity regarding oil
Quality class 3
For catalysts
The following specifications are valid unless otherwise defined by any other
relevant sources:
Compressed air for soot blowing must meet at least the following quality
requirements according to ISO 8573-1:2010.
▪ Purity regarding solid particles
Quality class 3
▪ Purity regarding moisture
Quality class 4
▪ Purity regarding oil
Quality class 2
Compressed air for atomisation of the reducing agent must fulfil at least the
following quality requirements according to ISO 8573-1:2010.
Compressed air quality of
starting air system
Compressed air quality in the
control air system
Compressed air quality for
soot blowing
Compressed air quality for
reducing agent atomisation
2016-10-27 - de
Quality guidelines (conventional and Common Rail
engines)
Quality guidelines (conventional and Common Rail engines)
General
MAN Diesel & Turbo
010.000.023-21
D010.000.023-21-0001 EN 1 (2)