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Dust Collector Function
The most fundamental part of the dust collector is referred to as the filter chamber. Air
containing dust particles enters the filter chamber from the blast head via the exhaust
hose. This air then moves into the dust collector inlet connection located on the left, front
side of the dust collector. Next, the air passes through a plenum & moves through filter
cartridges. These filter cartridges capture the dust particles & prevent them from moving
on with the air. Now dust-free, the air then passes to the clean air portion of the dust
collector where it is subsequently released back into the environment by way of the
silencer box.
Dust Collector Maintenance
The dust collector must be examined habitually. This is because adequate ventilation is
essential for the dust collector. It is therefore vital that the following areas are routinely
examined:
• Adequate ventilation is available at all times. Ventilation irregularities can have a
negative effect on the efficiency of both the shot blasting machine & the dust
collector. Poor ventilation results in excessive wearing of the blast wheel & liner
wear. Despite conventional wisdom, shot is not the primary cause of wear & tear
to shot blasting machines. In actuality, it is the dust & other contaminants produced
by these machines that typically cause their parts to wear prematurely. As a result,
it is essential that proper ventilation be supplied to the machine at all times by
keeping the dust collector free of excessive contamination.
• The hose connections between the blast head & the dust collector must be tight.
• The hose must be in good condition. Flattened spots, holes, & wear spots should
be corrected without haste. Hose must be replaced if necessary.
• Filter cartridges must be kept in good, working condition.
If the dust collector is not in proper, working order, then this can have a detrimental effect
on the entire system. Improper ventilation can result in inadequate abrasive cleaning
which hastens blast wheel & liner wear. It is, consequentially, essential that the dust
collector be well maintained. A dust collector that receives timely, regular maintenance
will result in less shot contamination which will help to both reduce operating costs &
increase overall effectiveness. Before inspecting or removing filter cartridges, make sure
that the shot blasting machine shot blasting machine is on a level surface. Also, make
sure that the machine has been properly immobilized. Finally, verify that shot blasting
machine is in the off position & has been disconnected from all power sources.
Inspection Timetable
The shot blasting machine contains parts that are continually exposed to steel shot
moving at high rates of speed. The combined effect of contact with steel shot traveling at
high rates of speed & exposure to concrete dust causes these parts to deteriorate. As a
result, the operator or maintenance personnel should inspect the machine wear parts
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