3838
Stripe Hog Systems
Spray Bar Protector
Each spray bar is equipped with a spray bar pro-
tector that is held in place with one or two cotter
pins. The spray bar protector shields the nozzles
and spray bar from damage caused by debris dur-
ing blasting operations. Never perform ultra-high
pressure blasting operations without the spray bar
protector installed as this will dramatically shorten
the life of the nozzles and spray bar.
Nozzles
Ultra high pressure is produced by restricting
the ow of water at the nozzles on the blasting
head. Each nozzle delivers a stream of water at
extremely high pressure that is determined by
nozzle orice size and it’s Gallon Per Minute (GPM)
ow at desired pressure. The performance ranges
from least aggressive (.005”) to most aggressive
(.015”). The condition of the nozzles is critical to
removal performance and maintaining a tight,
cohesive stream as water is forced through the
nozzles. Maximum productivity and 98% removal
without damage requires nozzles to be in excel-
lent condition. Nozzles should be inspected before
the start of each shift as part of the pre operation
check or when the operator notices a loss in pres-
sure or a change in performance while blasting. If
visual inspection of the nozzle spray pattern indi-
cates that the pattern is not in the #1-4 quality
range as indicated on the Nozzle Quality Guide,
the nozzle must be replaced.
Testing and inspecting nozzles:
To inspect and test the nozzles, raise the hog
head to the full up position and set the parking
brake. Then remove the spray bar protectors. The
protectors will disrupt the spray pattern causing
inaccuracies when inspecting or testing nozzle
performance. Once the spray bars protectors are
removed and all personnel are well clear of the
blasting heads, activate the high pressure system
and set the operating pressure to a safe level.
Make sure the head rotation speed dial is set to
0 so the spray bars do not rotate. Staying well
clear of the water jets, no closer than 18”, visually
inspect the spray pattern of each nozzle. If the
spray is tight with a cohesive stream for 1/2 - 1
1/2 inches from the nozzle, it rates as grade 4 or
better (Refer to the Nozzle Quality Guide in this
section of the manual) and it is good.
Typical Spray Bar Protector & Gasket
Blasting Heads With Spray Bar Protectors Installed
Spray Bar Nozzle
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