60
Symptom Cause
Solution
Store collected dust in drums, bags, or bins instead of
hopper
Install bin-level indicator
Dust stored in hopper (continued)
Consult Customer Service (1-800-479-6801)
Install compressed air purge (air sweep) equipment
Install hopper with increased hopper angle
Install bin-level indicator
Hopper slope insufficient
Consult Customer Service (1-800-479-6801)
Install compressed air purge (air sweep) equipment
Install hopper with larger discharge opening
Install bin-level indicator
Discharge opening too small
Consult Customer Service (1-800-479-6801)
Confirm screw conveyor speed for application, make
adjustment
Increase the conveyor opening by making it wider and
flared
Lubricate bearings or motor if applicable
Replace bearings or motor if applicable
Replace gasket or caulk on hopper flange
Confirm correct application of conveyor, replace if
necessary
Refer to screw conveyor manual for further information
Consult screw conveyor manufacturer
Screw conveyor malfunction
Consult Customer Service (1-800-479-6801)
Confirm the screw airlock speed for application, make
adjustment
Check for correct rotation of blades, reverse direction if
necessary
Lubricate bearings or motor if applicable
Replace bearings or motor if applicable
Replace gasket or caulk on hopper flange
Confirm correct application of airlock – replace if necessary
Refer to airlock manual for further information
Consult airlock manufacturer
Dust Bridging in Hopper (continued)
Rotary airlock malfunction
Consult Customer Service (1-800-479-6801)
Replace cartridges (service life determined by application)
End of cartridge service life
Consult Customer Service (1-800-479-6801)
See sections following
High Pressure Drop
Check and adjust cleaning mechanism
Increase air pressure to cleaning mechanism
Check and repair diaphragm valves
Check, program, and repair timer / controller
Check and correct any inlet plugging
Check and reduce moisture present
Check temperature, use appropriate media or use dilution
air
Change media area or media type
Perform off-line cleaning
Check fan speed and damper accordingly
Install overbags to prevent blinding
Media Failure
High pressure drop
Confirm appropriate location of pickup points and hoods