- 4 –
ZVP-PC-0154-00-R1
5.0
TROUBLE SHOOTING GUIDE
Item
Problem
Possible Cause
Corrective Action
1
Blast pot will not
pressurize
No / inadequate compressed air
supply
Check that air compressor is
operational. Ensure air output and
supply hose size is correct.
Main supply ball valve (Figure A. No.2)
is closed
Open ball valve
Pop up valve / seating ring worn or
damaged
Inspect & replace as required
Exhaust ball valve open
Close exhaust ball valve
2
No air and/or
abrasive flow
from nozzle
Blast nozzle blocked
Depressurize system & remove nozzle
from its holder
Check & clear any possible blockage.
Re-fit nozzle
Pusher line choke valve fully closed
Open and adjust the choke valve as
necessary.
Abrasive ball valve (Figure A. No. 4)
fully closed
Open and adjust abrasive ball valve as
required
Pop up valve or seating ring worn or
damaged
Inspect and replace as required
Insufficient abrasive in blast pot
Refill with abrasive as required
Excessive dust and fines in abrasive
Drain abrasive from blast pot and refill
with clean abrasive
Damp or wet abrasive in blast pot
Drain abrasive from blast pot and refill
with clean abrasive
3
Intermittent
abrasive flow
Excessive dust and fines in abrasive
Drain abrasive from blast pot and refill
with clean abrasive
Insufficient abrasive in blast pot
Refill with abrasive as required
Damp or wet abrasive in blast pot
Drain abrasive from blast pot and refill
with clean abrasive
Excessive abrasive
Check and adjust air pressure as
required.
Compressed air supply pressure too
low
4
Excessive abrasive
flow
Abrasive ball valve (Figure A. No.4)
fully opened
Adjust abrasive ball valve (Figure A. No.
4) as required
Pusher line choke valve fully closed
Open & adjust choke valve as required
5
Excessive wear on
blast hose
Blast hose kinked or coiled
Keep blast hose as straight as possible
without being coiled.
Blast nozzle excessively worn
Check the internal diameter of blast
nozzle and replace if necessary.
