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Z1

Z1

.8

AIR PURITY CLASS

The ISO 8573-1 standard establishes the level of air quality in terms of solid particles, humidity and oil concentration.

TECHNICAL DOCUMENTATION

Maximum number of particles for m

3

Class

Particle size, d [μm]

0.1 < d

f

0.5

0.5 < d

f

1.0

1.0 < d

f

5.0

0

As specified by the equipment user or supplier and more stringent than class 1

1

f

20000

f

400

f

10

2

f

400000

f

6000

f

100

3

Not specified

f

90000

f

1000

4

Not specified

Not specified

f

10000

5

Not specified

Not specified

f

100000

Class

Concentration, C

P

[mg/m

3

]

6

0 < C

p

f

5

7

5 < C

p

f

10

X

C

p

#

10

Class

Pressure dewpoint [°C]

0

As specified by the equipment user or supplier and more stringent than class 1

1

f

-70

2

f

-40

3

f

-20

4

f

+3

5

f

+7

6

f

+10

Class

Concentration of liquid water, C

W

[g/m

3

]

7

C

W

f

0.5

8

0.5 < C

W

f

5

9

5 < C

W

f

10

X

C

W

#

10

Class

Oil concentration (aerosol, liquid, vapour) [mg/m

3

]

0

As specified by the equipment user or supplier and more stringent than class 1

1

f

0.01

2

f

0.1

3

f

1

4

f

5

X

#

5

Solid particle class (table 1)

1

Humidity class (table 2)

Oil class (table 3)

7

2

Example:

TABLE 3 – OIL CLASSES

TABLE 2 – HUMIDITY CLASSES

TABLE 1 - SOLID PARTICLE CLASSES