5.5 Recommendations for Effective Results
When the ROV operator is ready to commence cleaning operations, verify that
the lance is securely attached to the manipulator.
Once the hydraulic power unit is operational and the water jet stream is flowing
from the lance, the ROV operator has to find the most effective distance between
the lance nozzle and the surface being cleaned. (See Figure 5.2)
1. Engage the ROV’s hydraulic power unit to activate the CaviBlaster
unit.
2.
The most efficient operating technique is to hold the nozzle 2-5 inches (5-12
cm) away from the surface to be cleaned and at a 25 to 45 degree angle to
the surface being cleaned (See Figure 5.2).
The ROV operator needs to
observe the shape of the cavitating jet cone. At greater depths, the higher
ambient pressure will cause the jet cone to be shorter. The widest zone of the
cone is the most efficient part of the cavitating jet. Placing the nozzle closer
than 2 inches (5 cm) from the surface being cleaned will not allow for efficient
cavitation performance and will degrade the cleaning capability of the
CaviBlaster
system.
3. Follow all safety regulations that may be applicable to the work being
performed.
Figure 5.2 – Lance Position for Best Cleaning Results
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