34
PulsePak Prime
GDED-IOM-216-B
13
TROUBLESHOOTING
13.1
High differential pressure
Cause: Improper pulse cleaning action
Solution: Investigate further, check the wiring, fuses, settings on the pulse
controller, failure of the pulse controller
Cause: Lack of compressed air
Solution: Check compressed air supply, valves and gauges, any filters. Correct
supply pressure should be 90-100 psig
Cause: Diaphragm valve failure – may be indicated by non-action or a
continuous hissing from one valve
Solution: Replace diaphragm and spring if faulty
Cause:
Solenoid “pilot” valve malfunction. Listen for health clicking of each
solenoid and momentary venting as solenoid is energized.
Solution: Replace solenoid
Cause:
Air leakage at hopper – at dust discharge device
Solution: In-leak of air at the hopper will lift collected dust back up onto the
cartridges causing high differential pressure. Check integrity of the air
seal at the dust disposal device (gate valve, barrel, rotary valve etc.)
referring to the relevant IOM and taking all safety precautions.
Cause:
Moisture/Condensation
Solution: Free moisture on the cartridges will inhibit dust release and cause high
differential pressure. Run the pulse cleaning in timer mode with the fan
off for at least 15 minutes (“off line cleaning”) to release the sticky
material. Investigate the cause of the excessive moisture and consider
remedies such as elimination of rainwater leakage into the ductwork,
process variations, water in the compressed air manifold.
Cause:
Static Electric charge effects may occur with very highly electrically
resistant dusts (e.g. polypropylene dust) and in very dry applications
Solution: Switch to AAF Anti-Static Panel Pak cartridges
