10
Annex
10.1
Example: Compressed air supply with compressor
Overview
ø 8 mm
ø 4 mm
ø 4 mm
ø 4 mm
ø 4 mm
ø 8 mm
ø 8 mm
3
2
1
4
5
6
6
ø 8 mm
A1
A2
B1
B2
Figure 20: Example: Compressed air supply with compressor
1
Oil-free compressor
2
Non-return valve
3
Compressed air tank
4
Pressure switch
5
Filter regulator and oil filter
6
Valve
Components
•
Oil-free compressor
•
Non-return valve: Compressors do not usually start up under backpressure. The
output line of the compressor is therefore vented before start-up. If no non-return
valve is present between the compressor and the compressed air tank, the com‐
plete system is depressurized each time.
•
Compressed air tank: The compressor increases the pressure in the compressed
air tank to a predetermined value (maximum 1,000 kPa = 10 bar), then the com‐
pressor switches off. The compressed air tank should hold enough compressed air
for at least 2 to 3 cleaning cycles.
•
Pressure switch: The pressure switch controls the compressor using an upper and
a lower threshold. When the value falls below the lower threshold, the compressor
switches on. When the upper threshold is reached, the compressor switches off. If
the lower threshold value is set too low, the pressure may drop to such an extent
that the cleaning effect is reduced. If the upper threshold is set too high, the
compressor may not be able to reach it or may have difficulty reaching it, require a
lot of energy, or may be damaged.
•
Filter regulator: The filter regulator removes particles and condensate from the
compressed air. It limits the operating pressure to the set value.
ANNEX
10
8027429/2022-05-20 | SICK
O P E R A T I N G I N S T R U C T I O N S | airWiper
35
Subject to change without notice