S filter and D filter
When the S and D filters are used with an adsorption type air dryer, install the filter downstream
of the dryer.
V filter
To protect the activated carbon element, a V filter must always be preceded by a G and C filter.
The filter should be mounted as close as possible to the point of use of the air.
3.3
ISO 8573-1
General
For new installations as well as for installations that have to be made up-to-date, the ISO
8573-1:2010 standard can be used. Some proposals are given fulfilling this standard.
This part specifies purity classes of compressed air with respect to particles, water and oil,
independent of the location in the compressed air system at which the air is specified or
measured, for ISO 8573-1:2010 standard.
The ISO 8573-1:2010 standard only concerns compressed air for general use and does
not deal with, or is not applicable to, e.g. breathing air.
ISO
class
Dust
Water
Oil
Maximum number of particles per m
3
as
function of particle size d
Pressure dew point
Total oil concentration
(aerosol, liquid and
vapour) mg/m
3
0.1< d ≤0.5
μm
0.5< d ≤1.0
μm
1.0< d ≤5.0
μm
°C
°F
0
As specified by the equipment user or supplier and more stringent than class 1
1
≤ 20000
≤ 400
≤ 10
≤ -70
≤ -94
≤0.01
2
≤ 400000
≤ 6000
≤ 100
≤ -40
≤ -40
≤0.1
3
not specified
≤ 90000
≤ 1000
≤ -20
≤ -4
≤1
4
not specified
not specified
≤ 10000
≤ +3
≤ +37.4
≤5
5
not specified
not specified
≤ 100000
≤ +7
≤ +44.6
-
6
mass concentration: 1 - 5 mg/m
3
≤ +10
≤ +50
-
Terms and definitions
Particle: small discrete mass of solid or liquid matter
Particle size
d :
length of the greatest distance between two external boundaries
Dew point: temperature at which water vapour begins to condense
Pressure dew point: dew point of the air at the specified pressure
A desiccant dryer will be needed to reduce the dew point down to -40 °C (-40°F).
The air purity according to ISO 8573-1:2010 is expressed as follows: class [X.Y.Z], where X, Y
and Z are respectively the purity classes with regard to dust, water and oil.
Instruction book
16
2920 7195 00