Air Supply - MW TOOLS CAT420 Mode D'emploi

M1.2.CAT420.NLFREN 24092018
EN
3. Reverse pressure
If media stops flowing occasionally, place thumb over nozzle (hold tight) and push foot pedal down for a couple of
seconds. This will cause the system to back blast through the gun and up the media hose. This will help loosen any
clogs.
4. Gun air pressure drop
Set the air pressure to 80 psi/5.51 bar on the air gauge at regulator. Push the foot pedal while holding gun and see
if the gauge pressure drops significantly. If the pressure drops, this indicates that there is a restriction in the supply
line. This could be hose that is too small, a reducer or quick coupler, a plugged filter, or other piping that doesn't
allow enough air through. Also if the cabinet is too far from the air compressor, a pressure drop will occur. Air supply
line should be 1/2" or larger.
5. Poor visibility - Excessive dust
- Air inlet at front left above regulator, should be free to allow air into cabinet.
- Dust container full and needs to be cleaned and emptied. Latch at bottom of dust collector or remove black cover on
vacuum.
- Dust cartridge contaminated. Clean or replace filter in dust collector, part 29.
- Media breakdown. Eventually the media becomes so small that it is essentially dust. Replace media and clean dust
collector.
6. Poor visibility - Viewing window
The windows come with a clear plastic protector on them. As these become pitted, they can be easily replaced to
extend the life of the window. The window can also be easily replaced.
7. Poor media flow
- Check for moisture as indicated above. Install moisture trap as needed. Replace damp media and clean hoses and
sump.
- Holes in media hose will cause poor media delivery. Replace hose.
- Debris in media. Replace or screen media.
5 Maintain suction efficiency with simple steps
The most common problem customers have with their suction blast cabinets is a decrease in production rates. A properly
maintained suction cabinet should provide years of constant service. When production rates fall, the operator can usually
locate the problem by checking:

1. Air supply

If the pressure gauge on the regulator shows an adequate no-load supply (when the
blaster is not running), press the foot pedal. If the pressure drops more than a few psi/
bar, your air supply is restricted or inadequate. Clean filters and moisture separators
all the way back to the air compressor. Straighten any kinky lines. Use a master gauge
to check the air pressure or replace existing gauge if you suspect it is giving you false
readings.
2. Blasting gun
The nozzle will wear out eventually. Replace it if it measures 1/16"/0.15 cm over
its original size or if it shows uneven wear. Adjust as needed for different media and
conditions. A properly working gun will pull 15-17 inches/38-43 cm of mercury on a
manometer.
3. Dust collector
Inadequate cabinet ventilation results in reduced cleaning power at the nozzle as well
as diminished view of the work in progress. Use the dust collector's shaker (see figure
opposite, no. 33) every 20-30 minutes when the cabinet is turned off (more often in
dusty conditions). Empty dust collector at least once a day. Remove filter and blow
out occasionally to keep the dust collector or vacuum working efficiently. Replace as
needed.
15
TOOLS
Shaker