SmartROC D65 T4F 10 Options
196 No: 713944459.6 en
WARNING
Serious injury
The blowdown valve works with air under high pressure. Air under high pressure is ex-
tremely dangerous.
u Remove or isolate the air or hydraulic inputs before service or maintenance.
u The valve has internal moving parts that can be dangerous due to pressure forces. Do
not position any part of the body or any objects in the valve ports during tramming.
Drilling mode
The blowdown valve is open in drilling mode, so that cuttings can pass freely through the
main passage in the valve. The air supply in the valve flows directly from the inlet port to
the outlet port and then to the air swivel. Air is blocked from entering into the blowdown
port.
Drilling mode is selected by setting the switch on the control box to DRILL for at least 2
seconds.
CAUTION
Risk of injury
It is essential that the valve is fully open in drilling mode. If the valve is only partially
open, it will be subject to serious wear very quickly.
Blowdown mode
The main passage in the valve is closed in blowdown mode and the cuttings blocked. The
air outlet port is closed and the blowdown port is now open for the inner tubes. All the air is
now directed down the inner tube.
Blowdown mode is selected by setting the switch on the control box to BLOWDOWN for
at least 2 seconds.
CAUTION
Risk of injury
All the cuttings on their way up in the inner tube must have passed the rotation unit be-
fore blowdown is activated.
u Lift the drill bit from the bottom of the hole and wait for at least 3 seconds before activ-
ating blowdown.
10.11.5 Daily maintenance
Cleaning
Cleaning the system should take place at the end of the work shift.
Access can take place in several ways:
n Rotating the cyclone and opening the cover plate.
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