13
www.greenerblast.com
Problem
Corrective Action
Grit delivery is not smooth: (slugging/surging)
Air pocket in vessel. Bleed purge valve and try
again
Pot/differential pressure is too low.
Repeat initial pot & blast pressure steps
Blast Stream Seems wetter than it should be
Pot/differential pressure is too high. Repeat
initial pot & blast pressure steps
Water Pump is not cycling
Pump may be stuck between cycles, crack air
purge valve to get it cycling again.
Pump is cycling erratically
Air was not completely relieved from pot.
Machine won’t develop any blast pressure
If compressed air supply is deemed sufficient,
the blast pressure regulator, or regulator pilot
valve may be malfunctioning.
Emergency switch must be in on position for
machine to function.
Cannot control pot pressure, or pot pressure is
maxed out during setup
Pot pressure regulator may be malfunctioning
Pressure
50
60
70
80
90
100
120
Nozzle Size
(Achievable blast pressure will vary depending on compressor)
#8
200
225
250
275
300
340
430
#10
300
350
400
450
500
550
680
#12
430
500
575
650
700
800
1,100
