47
Section 4 - Maintenance
4.6 Nozzle Installation
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 all nozzles to be in excellent
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 pressure or
a change in performance while blasting. If visual
inspection of the nozzle spray pattern indicates
that the pattern is not in the number 1-4 quality
range as indicated on the Nozzle Quality Guide,
the nozzle must be replaced.
Nozzle Replacement Procedure:
1. Make sure the waterblasting system is shut-
down with the power system in the service
position.
2. Remove the spray bar protector cotter pin and
the spray bar protector.
3. Remove worn or damaged nozzles.
4. Reactivate the power system and the water
blasting system by following the steps in the
Startup Procedure.
5.
Purge the system at low pressure to flush
debris from the spray bar.
Spray Bar Protector, Cotter Pin & Gasket
Typical Blasting Head With Spray Bar Protector Installed
6.
Once the spray bar is flushed, deactivate the
waterblasting system and return the power
system to the service position.
7. Apply a light coat of anti-seize to the threads
on the new nozzles.
8. Install the nozzles being careful not to get
any anti-sieze on the seat area of the nozzle
or the spray bar.
Typical HT1000SR Spray Bay Without Nozzles
& Spray Bar Protector
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