• High Collector Pressure Drop
    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
  • Abnormally Low Pressure Drop
    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
  • Stack Emission
    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
  • Puffing Back
    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
  • Low Dust Discharge
    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
  • Corrosion
    Possible Cause
    Improper paint material or Application
    Improper insulation
    Emission of nearby equipment
    Dew point excursions
    Improper shutdowns
  • Loud or Unusual Noises
    Possible Cause
    Vibrations or banging of moving parts
    Squealing of belt drives