PRODUCT OPERATING MANUAL
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3.5
Fit the Pusher Line hose barb fitting to the
supply air end of the lower “T” piece fitting
(client supply), use thread sealant to ensure an
air tight joint.
3.6
Push the Pusher Line hose onto the hose barb
fitting and tighten the two bolt hose clamp on
to the hose.
3.7
Fit the screwed hose coupling to the discharge
end of the lower “T” piece, use thread sealant to
ensure an air tight joint.
3.8
Refit the blast hose ensuring that the coupling
Safety Lock Pins are fitted.
4.0
OPERATING INSTRUCTIONS
4.1
The Junior Plana Valve is fully CLOSED when the
metering handle is positioned in a parallel line
to the abrasive inlet feed port, the fully OPEN
position can be obtained by moving the
metering handle either side of the parallel
position.
4.2
To set the correct abrasive feed on the valve,
have a suitably experienced person assist in the
adjustment. Point the nozzle at a test piece,
deactivate the safety lock on the Deadman
Handle and depress the lever, have the person
assist in slowly moving the control handle from
the CLOSED position toward the OPEN position
in small incremental movements. Allow the
abrasive feed to stabilize at each position and
ascertain whether a correct blast mixture has
been achieved. The valve opening is correct
when the flow from the Blast Nozzle slightly
discolors when viewed from a light contrasting
background.
4.3
If no discoloration is evident and there is a high
pitched sound from the Blast Nozzle, the
abrasive media feed is too lean and the
abrasive media flow needs to be increased by
further opening the valve’s metering handle.
4.4
If the feed to the Blast Nozzle is erratic and
surging then the abrasive media feed is too rich
and the abrasive flow needs to be decreased.
5.0
MAINTENANCE
! WARNING ! THE COMPRESSED AIR
SOURCE MUST BE ISOLATED BEFORE
PERFORMING ANY MAINTENANCE WORK.
FAILING TO DO SO MAY CAUSE SERIOUS
INJURY OR DEATH.
5.1
Inspection of the Control Plate can be done with
the valve in place on the blast machine. Ensure
the blast machine has been completely
depressurized and that the compressed air
supply has been isolated. Remove the metering
handle from the Control Plate. Undo the 4 bolts
on the valve assembly which allows the lower
body assembly to drop away from the Upper
Body allowing easy inspection of the Control
Plate and replace if required.
5.2
With the lower body assembly removed inspect
the discharge nipple and “T” piece assembly for
wear and replace if required.
6.0
TROUBLE SHOOTING
6.1
No abrasive flow.
6.1.1
Damp abrasive. Depressurize the blast machine,
and remove the metering handle from the
Control Plate. Undo the 4 bolts on the valve
assembly which allows the lower body assembly
to drop away from the Upper Body allowing
easy inspection, clean and remove any damp
abrasive media and reassemble the valve.
6.1.2
Obstruction in valve. Depressurize the blast
machine and remove the metering handle from
the Control Plate. Undo the 4 bolts on the valve
assembly which allows the lower body assembly
to drop away from the Upper Body allowing
easy inspection, clean and remove any damp
abrasive media and reassemble the valve.
6.2
Irregular abrasive flow.
6.2.1
Incorrect adjustment of the abrasive media
valve may cause irregular abrasive flow, check
the metering plate setting as outlined in section
4.2.
6.2.2
A high degree of fines in the abrasive mix can
cause “Rat Holing” leading to erratic abrasive
feed, check the abrasive and replace if
necessary. Refer section 6.1.1 above.
6.2.3
Abrasive media is not free flowing; this will
require adjustment of the Pusher Line Ball Valve
to improve flow from the blast machine.
6.3
Air leakage at the Valve.
6.3.1
Check the body clamping bolts have been
tightened correctly.
6.3.2
Inspect the Upper Body O-Ring condition,
replace if worn.
6.4
No abrasive or air from nozzle.
6.4.1
Obstruction at the Blast Nozzle, depressurize
blast machine and remove the nozzle from the
Nozzle Holder and inspect.
