When a dust collector stops performing, the symptoms are usually obvious: dust escaping at the hoods, a dirty plume from the stack, or a pressure gauge creeping upwards. Finding the cause takes a methodical approach.
Lost suction at the hoods
- Filters blinded or overdue for replacement
- Blocked or damaged ducting
- Fan worn, slipping belts or wrong rotation
- Dampers closed or new pickup points added
Visible emissions
- Torn or poorly seated filters
- Damaged tube sheet or seals
- Filters installed without gaskets
- Media unsuitable for the dust
High pressure drop
- Cleaning system not working: check compressed air pressure, valves and controller
- Wet or oily compressed air
- Dust re-entrainment from an overfull hopper
- Moisture or condensation in the collector
Hopper problems
Dust bridging or overfilling hoppers can quickly cause re-entrainment and filter damage. Check that rotary valves and conveyors are running and that the hopper is emptied regularly.
Keep records
Recording pressure drop, filter changes and faults over time makes problems much easier to diagnose.
SP&DE services and repairs dust collectors across South Africa. Contact us if your system is not performing.
