20
⇒
Incorrectly adjusted metering valve.
⇒
Too heavy blast media.
Worn nozzle
-remove / change nozzle
Moist blast media.
−
Frequent bridging or blockage in the media
metering valve can be caused by moist blast
media. Following reasons could be possible:
⇒
Media was filled moistly
remove
⇒
Humidity from air supply
interconnect
humidifier
⇒
Perspiration water caused by sharp drop in
room temperature
Make sure, that there
is not too much temperature fluctuation.
(4) Dust comes out the
blower
Dust filter gasket defective.
-Replace gasket -see 6.4.5
Defective cartridge.
- Replace cartridge -see 6.4.5
(5) Static shocks
- improve grounding of the cabinet.
- in exceptional cases use supplementrary ground
wire between blast gun and cabinet wall
(6) No air and no media
comes out the
nozzle
Door interlocks are not actuated Adjust pin resp. door fixing bzw. see 6.4.7
Wrong connection of pneumatic
hoses on foot pedal
permanent air blow off
- Only when foot pedal was new installed
- Connect properly
Polluted (blocked) moisture
separator.
Cleanse moisture separator
Hose of control lines leaky
- Need of second person
- First person „is blasting“
- Second person checks leakages on controles
lines
(7) Air only (no media)
comes out the
nozzle
No blast media in the blast
circuit
-Refill
Moist media
-Remove moist media.
-Remove cause for humid air supply.
Caution! Risk of injuri!
Dicharge completely pressure during maintenance jobs.
(8) No interruption of
blast process when
foo pedal is
released
Foot pedal valve blocked.
- depressurize the installation (see 6.4.1)
- replace foot pedal valve
(9) Irregular flow or too
much blast media
comes out the
nozzle
Incorrect adjusted media flow.
Adjust new (see 6.4.2).
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