Technical Service & Troubleshooting
We welcome telephone consultations and offer FREE advice. Our fee-based Technical Service provides on-site evaluations and in-depth analysis.
Common Problems
| Possible Cause | Solution |
|---|---|
| Malfunction of bag cleaning System | Check all cleaning system components |
| Ineffective cleaning | Modify cleaning cycle |
| Re-entrainment of dust in collector due to low density material or inleakage at discharge | Check discharge valves Lower A/C Ratio |
| Wetting of bags | Control dew point excursions Dry bags with clean air Clean bags or replace |
| Too high A/C ratio | Verify gas volume |
| Possible Cause | Solution |
|---|---|
| Lines(s) plugged | Blow back thru lines Protect sensing point from dust or water build-up Incorporate auto-purging system in sensing lines If copper lines – air purge them yearly – could get moisture trapped |
| Manometer line(s) broken or uncoupled | Inspect and repair |
| Possible Cause | Solution |
|---|---|
| Bag permeability increase | Test bag Check cleaning energy/ cycle and reduce if possible |
| Clean to dirty plenum leakage | Inspect and repair |
| Change of inlet conditions | Test & Review |
| Possible Cause | Solution |
|---|---|
| High pressure drop across the bag house | See “High Collector Pressure Drop” above |
| Low system fan speed | Check drive system increase speed |
| Improper duct balancing | Rebalance system |
| Plugged duct lines | Clean out |
| Poor hood design | Evaluate temporary modifications and implement |
| Possible Cause | Solution |
|---|---|
| Inleakage at discharge points | Inspect and repair seals or valves |
| Malfunction of discharge valve, screw conveyor or material transfer equipment | Inspect and repair |
| Re-entrainment of dust with in collector | Check for leaks at discharge or hopper |
| Retainment of dust on filter bags | Increase cleaning |
| Possible Cause |
|---|
| Improper paint material or Application |
| Improper insulation |
| Emission of nearby equipment |
| Dew point excursions |
| Improper shutdowns |
| Possible Cause |
|---|
| Vibrations or banging of moving parts |
| Squealing of belt drives |
Dust Collector Maintenance
| Maintain daily pressure drop readings on graph |
| Keep bag location replacement chart |
| Watch for consistent bag failures and retain typical bag for inspection |
| Retain bags that have unusual or noncharacteristic failures |
| Maintain an adequate supply of bags, cages and Diffusers to avoid costly production delays |
| Check pressure drop across baghouse |
| Check header air pressure |
| Drain header |
| Check air lock for operation and leaks |
| Rap hopper with rubber hammer to avoid bridging and build up |
| Visually inspect stack |
| Check temperature gauges (know bag limitations: temperature) |
| Inspect tubesheet for dust accumulation, corrosion and evidence of condensation |
| Visually inspect bags for blinding, leakage and wear. When possible perform Trace-It leak detection test |
| Check timer control for operation and proper pulse sequence and duration |
| Clean pressure gauge taps with compressed air |
| Check foundation bolts, housings and belts on fans and motors |
| Check inlet air flow into baghouse |
