Hog Technologies STRIPE SH7500, Operation Manual

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Section 2 - 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
during blasting operations. Never perform water-
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 flow 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 orifice size and it’s Gallon Per Minute (GPM)
flow 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 in
this section, the nozzle must be replaced.
Testing and inspecting nozzles:
To inspect and test the nozzles, raise the arm to
the full up position and set the parking brake.
Make sure the waterblasting system is shutdown,
then remove the spray bar protector. The protector
will disrupt the spray pattern causing inaccuracies
when inspecting or testing nozzle performance.
Once the spray bar protector is removed and all
personnel are well clear of the blasting head,
activate the UHP system and set the operating
pressure to a safe level. Make sure the head
rotation speed dial is set to 0 so the spray bar
does 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 Head With Spray Bar Protector Installed
Spray Bar Nozzle