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corrected media will not flow evenly and will plug up in the metering valve and the gun. Check
air supply; if water is present installed a good moisture trap. If oily or greasy parts are being
blasted, you should degrease and dry the parts first.
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 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 is the supply line. This could be that hose is too small, a reducer of 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 over on vacuum.
-Dust cartridge contaminated. (clean or replace filter in dust collector, part#19)
-Media breakdown; eventually the media becomes so small that it is essentially dust. Replace
media and clean dust collector.
6. poor visibility-viewing window
-Viewing 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 medial. Replace or screen media.
MAINTAIN SUCTION EFFICIENCY WITH SIMPLE STEPS
The most common problem customers have with their suction (venture) blast cabinets is a decrease in
production rates. A properly maintained suction cabinet should provided 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 and adequate no-load supply (when the blaster is
not running), press the foot pedal. If the pressure drops more than a few psi 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
