Downdraft work benches and tables
8
8.1 Operational checklist
1.
Monitor the physical condition of the collector and repair or replace any damaged
components. Routine inspections will minimize downtime and maintain optimum system
performance. This is particularly important on continuous duty applications. With the
compressed air supply ON, check the cleaning valves, solenoid valves, and tubing for leaks.
Replace as necessary.
2.
Monitor pressure drop across filters. Abnormal changes in pressure drop indicate a change
in operating conditions and possibly a fault to be corrected.
3.
Monitor exhaust.
4.
Monitor dust disposal.
8.2 Cellulose Filter
The filters pulsing system is a successful way to clean the filter. Filter life is increased if system is
pulsed regularly according to usage. Over a period of time, a visual inspection or a decrease in air
flow may indicate that the filter be removed from the table for manual cleaning.
To manually clean the filter outside the table, follow these steps:
•
Open covers on the right side of the table and slide out filters.
•
Remove filter. The filter should then be held at its horizontal position so as to be tapped for
removal of debris. This procedure may be done directly over a waste bag for easy disposal.
•
Blow compressed air through the filter in the reverse direction of air flow. This should be
done at the exterior of the shop (room) or in a well-ventilate area.
•
Do not wet or clean the cartridge with any liquid, as it may cause the forming of unwanted
blockage on the filter media. The filter may be weakened causing perforations to the media
and ultimately damage of the blower.
•
The filter needs to be replaced periodically. The filter life can range from 6 to 18 months
depending on many factors ranging from type of application, density, particle size, humidity,
oil, etc…
8.3 Dust Drawer
•
The dust drawer should be emptied periodically. Perform visual inspections during the first
few weeks of operation to determine proper dumping cycle.
•
Periodically inspect the gasket to ensure proper sealing. Replace if needed.
