MultiBlast PRO User manual

Operating Manual
December 2022
Section 1.0 Important Information
Section 2.0 How The System Works
Section 3.0 Installation & Initial Set Up
Section 4.0 System Operation & Adjustments
Section 5.0 Preventative Maintenance
Section 6.0 Troubleshooting
Section 7.0 Replacement Parts Listing
Section 8.0 Specifications
IMPORTANT –READ THIS INFORMATION CAREFULLY PRIOR TO
OPERATING THE EQUIPMENT.
ALL ABRASIVE BLASTING OPERATIONS ARE DANGEROUS AND
CREATE A HAZARDOUS ENVIRONMENT.
FAILURE TO COMPLY WITH THIS INFORMATION MAY CAUSE SERIOUS INJURY
OR DEATH.
Index
MultiBlast PRO Pressure Sandblasting Cabinet
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1.0 Important Information
1.1 All products and equipment designed and manufactured by MultiBlast Australia are intended for use by
experienced users of abrasive blasting equipment, and its’ associated operations and abrasive blasting
media.
1.2 It is the responsibility of the user/purchaser/distributor to:
1.2.1 Determine if the equipment and abrasive media is suitable for the users intended use and
application.
1.2.2 Familiarize themselves with any appropriate laws, regulations and safe working practices which
may apply within the user’s working area/environment.
1.2.3 Provide appropriate operator training and a safe working environment, including operator
protective equipment such as, but not limited to, safety footwear, protective eyewear, hearing
protection, and respiratory protection where applicable.
1.3 No representations are made or intended as to the useful life, maintenance cycles, efficiency or
performance of the reference products or any combination of products.
1.4 Information contained herein must not be used for estimating purposes. Production rates, labour
performance and surface finishes are the sole responsibility of the user.
1.5 Read all instructions carefully prior to operating this equipment, and do not allow it to be operated by
inexperienced, untrained, or unauthorised personnel.
1.6 Ensure that the equipment is correctly serviced and maintained as specified in this manual, and that only
genuine MultiBlast Australia replacement parts are utilised. Failure to use genuine replacement parts
may void your warranty.
1.7 All pressure vessels (where supplied) are designed, manufactured, and certified in accordance with
Australian Standard AS1210. A copy of this certification will be supplied with this manual if applicable. Do
not weld, grind, or drill any pressure vessel, as this will void the certification and warranty, and may
weaken the vessel causing a catastrophic failure.
1.8 This equipment is not designed for use in areas designated as hazardous. Contact your local MultiBlast
Australia office/representative prior to operating this equipment in a hazardous area.
1.9 All compressed air fittings, connections and hoses must be in good condition, fit for purpose, correctly
sized, and fitted, and carefully inspected prior to use.
1.10 Breathing airborne dust from any abrasive media may cause lung disease or other serious injury. Always
wear suitably designed respiratory protection when handling any abrasive media, and when in the
immediate area during any abrasive blasting operation.
1.11 Static electricity may be generated during any abrasive blasting operation. All equipment should be well
grounded/earthed to prevent electric shock and reduce the risk of spark generation.
1.12 All Supplied Air Respirators (i.e.: blasting helmets) where used must comply with the requirements of
AS/NZS 1716:2003 and must be supplied with breathing air as specified in AS/NZS 1715:2009 or higher, at
a flow rate between 170l per minute (6cfm) and 425l per minute (15cfm) at all times.
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2.0 How The System Works
2.1 The MultiBlast Australia pressure blast cabinets feature a cabinet to enclose and contain the
blasting action , a pneumatically operated , safety interlocked blast pot system , and a dust
collection system to ventilate the blast cabinet.
2.2 The blasting system
2.2.1 The pressure blasting system features an air pressure filter/regulator, a foot pedal to
start/stop the blast action, a pilot operated air control valve, safety door interlocks, and
a certified pressure vessel.
2.2.2 When the compressed air supply is turned on, the gauge on the pressure regulator will
show the incoming air pressure, and control line air will be fed to the foot pedal. See
schematic figure 1.
Figure 1
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2.2.3 In this state, even if the foot pedal is operated, the blasting system will not operate as
the cabinet door(s) are open, with the door interlock valves in the closed position.
2.2.4 For the blasting system to operate, the cabinet door(s) must be closed, allowing the door
striker to contact the door interlock valve plunger, which opens the air circuit. See
schematic figure 2.
Figure 2
2.2.5 With the cabinet door(s) closed and the foot pedal on, this allows the signal air to the air
control valve. This signal opens the air valve, and closes the exhaust valve, allowing
compressed air to enter the blast pot, lift the pop-up valve and pressurise the blast pot.
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2.2.6 With the blast pot pressurised, compressed air is fed to the abrasive valve through the
pusher line. As this air passes through the abrasive valve, the abrasive media within the
blast pot is gravity fed into the abrasive valve, where is mixes with the compressed air.
2.2.7 The air and abrasive media are then discharged at high velocity through the blast hose,
exiting at the blast nozzle attached to the end of the blast hose.
As the abrasive is spent within the blast cabinet, it falls into the cabinet lower hopper and
sits on top of the blast pot directly above the pop-up valve.
2.2.8 Once the operator releases the foot pedal, this shuts off the control line signal to the air
control valve and the exhaust valve. This closes the air control valve, and opens the
exhaust valve, which de-pressurises the blast pot. Once the air pressure in the blast pot
has been exhausted, the pop-up valve will drop, allowing abrasive sitting on top of the
blast pot to drain back into the vessel. See schematic figure 3.
Figure 3
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2.3 The ventilation system
2.3.1 The cabinet ventilation system is provided to improve visibility within the blast cabinet
for the operator, and also reduce the amount of dust within the abrasive mix.
2.3.2 Depending on the application and cabinet model selected, the ventilation dust collector
may be either a drum type unit, or a reverse pulse dust collector.
2.3.3 As the blasting system operates, dust and debris from the blasting action become
airborne within the blast cabinet. Airflow from the dust collector is drawn in through
entry vents in the top of the cabinet, and out of the cabinet via the flexible hose
connected to the rear of the cabinet.
2.3.4 This airflow draws the lighter dust and debris out of the cabinet and into the dust
collector, where it is filtered by a pleated filter cartridge before clean filtered air is
discharged from the dust collector outlet. See figure 3.
Figure 3 Showing RP Dust Collector
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3.0 Installation
3.1 The MultiBlast Australia blast cabinets do not require any special foundations , but should be
installed on a flat, level surface to provide a stable installation. The system will be shipped in a
semi-knocked down condition, with most smaller components transported within the cabinet
itself.
3.2 Once all packing materials have been removed, carefully remove all loose components from
within the cabinet, such as the light assembly, light glass, drum dust collector etc.
3.3 The blast cabinet should only be moved and positioned using a suitably sized forklift utilising the
two (2) forklift tyne pockets located on the base of the cabinet legs. See figure 4.
Figure 4
3.4Cabinet Models PRO800RP, PRO1200RP, and PRO1200RP are all supplied with the dust collector
attached to the side of the cabinet. All other models are supplied with the dust collector separate
to the main cabinet assembly. All models require that the outlet spigot on the rear of the blast
cabinet be connected to the inlet spigot on the dust collector, using the wire reinforced hose
provided.
WARNING –All installation work and associated connections
must be carried by suitably trained and equipped tradespersons.
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3.5 Position the dust collector within approximately 1.5m of the rear of the blast cabinet. Then
simply slide the hose over the cabinet spigot, and clamp firmly in place using the worm drive
clamps provided. Repeat this process with the dust collector inlet spigot. See figures 7 –9.
3.6 Position the blast pot directly beneath the cabinet and connect the rubber pot seal using the two
(2) worm drive clamps provided, ensuring an airtight seal is achieved between the blast pot and
cabinet. See figure 11.
NOTE –ALL JOINTS AND CONNECTIONS MUST BE FULLY
AIRTIGHT TO PREVENT ANY LEAKAGE. FAILURE TO PROVIDE
AIRTIGHT SEALS WILL PREVENT THE SYSTEM FROM
OPERATING CORRECTLY.
Figure 7
PRO800, PRO1200, PRO1500 & PRO1800
Figure 8
PRO1500RP & PRO1800RP
Figure 9
PRO1200RP (Plan View)
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Figure 11 Figure 12
3.7 For models with reverse pulse (RP) dust collection, position the 10-litre dust bin directly below
the dust collector hopper, and connect the spigot on the lid of the bin to the dust collector using
the wire reinforced hose and worm drive clamps provided. See figure 12.
3.8 Re-connect the pneumatic control line tubing as follows –
3.8.1 Red tubing –Connect one end to the port marked “P” on the foot pedal, (see figure 13)
and the other end to the signal line port on the supply side of the blast pot piping (see
figure 14).
3.8.2 Green tubing –Connect one end to the port marked “B” on the foot pedal, (see figure 15)
with the opposite end to the door interlock valve (see figure 16). The second green tubing
returns from the interlock valve (see figure 17) with the opposite end connected to the
control line side of the air control valve (see figure 18).
RED TUBING TO FOOT
PEDAL POT “P” TO
BLAST POT SUPPLY
SIDE
FIGURE 13 FIGURE 14
GREEN TUBING –
FOOT PEDAL PORT
“B” TO DOOR
INTERLOCK VALVE
FIGURE 15 FIGURE 16
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3.8.3 Black tubing –(For units with drum dust collector A201122-3) –Connect one end to the
second port on the supply side of the blast pot piping (see figure 19) and the other end
to the mini ball valve located on the top of the dust collector lid (see figure 20)
3.8.4 Re-connect the blast hose coupling to the abrasive control valve coupling by placing the
two coupling faces together and rotating the hose coupling clockwise until the coupling
lugs lock into position. Refit the safety locking pin through the 2 holes provided. See
figures 21 & 22.
3.9 Service connections (Refer Section 8.0 for sizing requirements)
3.9.1 Electrical power –The blast cabinet and dust collector will each come with its own 240V
single phase power cable fitted with a standard 3 pin male plug. The cabinet power supply
operates the cabinet lighting, while the dust collector power supply operates the dust
collector fan. Connect each cable to a suitably sized electrical power outlet.
GREEN TUBING
RETURN FROM
INTERLOCK VALVE TO
SIGNAL SIDE OF AIR
CONTROL VALVE
BLACK TUBING FROM
AIR MANIFOLD TO
DUST COLLECTOR
BALL VALVE
FIGURE 17 FIGURE 18
FIGURE 19 FIGURE 20
ABRASIVE VALVE
COUPLING
ABRASIVE HOSE
COUPLING
COUPLING
SAFETY CLIP
FIGURE 21 FIGURE 22
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3.9.2 Compressed air supply –All cabinet models (except PRO1000RP) require two (2) compressed
air connections. One for the blast air supply and another for the dust collector cartridge
cleaning system. The blasting system air connection point is located at the ball valve
mounted on the air control valve assembly. Refer figure 23
3.9.3 For the 200L drum dust collector, the compressed air supply connection point is the mini
ball valve located on the top of the drum lid. This air supply operates a pneumatic vibrator
which vibrates the dust off the filter cartridge. Refer figure 24.
3.9.4 For the reverse pulse (RP) dust collector, the compressed air supply connection point is
located on the end of the air manifold positioned directly on top of the dust collector
assembly. This air supply provides reverse air pulsing of the filter cartridge to keep the
filter clean. Refer figure 25.
CLEANING AIR
CONNECTION
POINT
BLASTING AIR
CONNECTION
POINT
FIGURE 23 FIGURE 24
CLEANING AIR
CONNECTION
POINT
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3.10 Initial Set Up
3.10.1 Using the cabinet switch mounted on the front of the cabinet (except PRO1000RP), turn on
the cabinet light assembly, and using the dust collector switch, turn on the dust collector
fan.
3.10.2 Open the blast cabinet main door and pour 20-25kg’s of abrasive media into the blast
cabinet through the perforated cabinet floor.
3.10.3 Turn on the compressed air supply to both the blasting system and the dust collection
system but leave the blasting system ball valve closed.
3.10.4 For systems supplied with the RP dust collection system, it is necessary to set the auto
pulse valve timer, mounted directly to the pulse valve fitted to the top of the RP dust
collector. See figure 24.
3.10.5 The auto pulse time has two (2) controls, one to set the pulse duration (ie: the amount of
time the pulse valve is open for) and another to set the pulse frequency (ie: how often
the pulse valve is activated).
3.13.6 The duration control is identified as the “on” control, and the frequency is identified as
the “off” control.
WARNING –Heavy lifting required. Take all necessary
precautions and use appropriate lifting equipment to avoid
injury.
AUTOMATIC
PULSE VALVE
CONTROLLER
FIGURE 24
FREQUENCY
CONTROL
DURATION
CONTROL
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3.10.7 For initial operation, set the “on” duration time at 0.5 seconds, and the frequency “off”
time at 3 minutes. Depending on the operating conditions, it will be necessary to adjust the
pulse timer to suit the conditions after a period of operation. Refer to Section 5.0
Preventative Maintenance for further information.
3.10.8 The system is now ready for initial operation.
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4.0 System Operation and Adjustments
4.1 Check that that all cabinet and dust collector doors are in the closed position.
4.2 Slowly open the blasting system isolation ball valve, which will send air supply to the foot pedal
control.
4.3 Check the pressure gauge reading on the front of the pressure regulator. The pressure will need
to be adjusted to suit each particular application; however, the initial setting should be
approximately between 60psi to 80psi. Refer figure 26.
4.4 To adjust the blasting pressure, lift the pressure adjustment knob to unlock it, then turn the knob
clockwise to increase the pressure, and counterclockwise to decrease the air pressure. Push the
knob down to lock it in position.
4.5 Fully closed the abrasive feed valve by turning the control knob clockwise, then open the valve
one full turn by rotating the control knob anti-clockwise.
WARNING –The blasting system is now ready and will
activate if the blast pedal is operated.
AIR CONTROL
VALVE
FOOT PEDAL
BLAST CONTROL
PRESSURE
ADJUSTMENT
BLAST
EXHAUST
VALVE
PRESSURE
GAUGE
ABRASIVE
CONTROL
VALVE
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4.6 The operator now stands in front of the cabinet and place their hands/arms into the left and
right glove openings respectively. Take a firm hold of the nozzle holder assembly and depress
the blast foot pedal with a foot. Blasting will now commence.
4.7 Check closely the abrasive and air mix as it discharges from the blast nozzle. The abrasive should
appear as a fine mist in the air stream. Optimum abrasive flow will vary with each application,
depending on abrasive type, size and condition, and blast pressure.
4.8 To increase the abrasive flow to the blast gun, turn the abrasive control valve knob anticlockwise.
To decrease the abrasive flow to the blast gun, turn the abrasive control valve knob clockwise.
Excessive abrasive flow will cause abrasive slugging and jerking of the blast gun.
4.9 To stop blasting, simply release the blast foot pedal.
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5.0 Preventative Maintenance
5.1 Daily
5.1.1 Drain any accumulated water from moisture trap bowl on the
bottom of the blast pressure regulator. Depress the button on the
drain valve attached to the bottom of the clear bowl, until all
water has been discharged.
5.1.2 Check the operation of the door interlock(s) ensuring that
the blasting system will not operate with the cabinet
door(s) in the open position.
Note: This maintenance schedule should be used as a general
guide only. It does not consider any requirements which may
occur on specific applications and working conditions.
WATER TRAP
DRAIN VALVE
DOOR INTERLOCK
VALVE
WARNING –The filter cartridge will become heavy when fully
dust laden. Use appropriate caution when removing the dirty
filter cartridge from the dust collector
WARNING –Breathing airborne dust from any abrasive media
may cause lung disease or other serious injury. Always wear
suitably designed respiratory protection when handling any
abrasive media and/or waste dust, and when in the
immediate area during any abrasive blasting operations.
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5.1.3 Drum dust collector –With the fan turned off, turn on the
compressed air supply to the cartridge vibrator, and allow
it to run for 2-3 minutes.
5.1.4 Turn off the air supply, unlatch the drum lid and lift off the
fan and cartridge assembly. Empty the dust drum and
reassemble the dust collector, ensuring a firm seal between
the drum and lid.
5.1.5 For models with reverse pulse (RP) dust collector - With the
fan turned off, unlatch the lid from the refuse dust bin and
empty the waste dust. Replace the dust bin, ensuring a firm
seal is achieved between the drum and lid.
5.2 Monthly
5.2.1 Unscrew the blast nozzle from the nozzle holder and insert
a 4.8mmmm (3/16”) drill bit into the nozzle bore to check
the bore size. Replace the nozzle once the nozzle has worn
1.5mm larger than the original 4.8mm dia.
5.2.2 Check the condition of the rubber nozzle washer and
replace if worn or grooved.
VIBRATOR
CONTROL VALVE
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5.2.3 Remove the blast hose coupling locking pin and disconnect the
blast hose from the abrasive control valve. Carefully inspect the
condition of both couplings and coupling gaskets. Replace the
coupling and/or gasket if they are showing any signs of wear or
grooving.
5.2.4 Check the condition of the abrasive hose by squeezing the hose between thumb and
fingers along its entire length. Internal wear will show up as a soft spot.
5.2.5 If the wear is close to the end of the hose, the end may be cut off and the hose refitted.
If along the length of the hose, replace the entire hose
5.2.6 Inspect the cabinet window for frosting and/or cracks. Replace
the window if the operators view becomes obstructed.
5.2.5 Inspect the operator work gloves for any signs of wear and/or
damage. To replace the gloves, unscrew the worm drive
retaining clamps, and pull the gloves off the glove spigot. Stretch
the new gloves over the spigots, checking that they are correctly
orientated with the palms of the gloves facing inwards towards
each other.
5.3 3 Monthly
5.3.1 Check the condition of the cabinet light glass. This glass will
become frosted over a period, which will reduce visibility inside
the cabinet area. Replace the glass as required.
5.3.2 For models with reverse pulse (RP) dust collector - Open the
dust collector door and inspect the filter cartridge for damage
and/or wear. Ensure the cartridge is firmly located on the
hanger, providing a proper seal around the top of the cartridge.
Replace the cartridge if are any visible signs of wear/damage,
and if there is noticeable dust emissions from the fan outlet
COUPLING
GASKET
CHECK GLOVE
ORIENTATION WHEN
REPLACING
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5.4.3 To replace the filter cartridge, carefully unscrew the hanger retaining nut on the bottom
of the filter until the top of the hanger rod can be lifted off the top hanger bar. Lift the
cartridge and hanger rod through the dust collector door as an assembly. Reverse the
procedure to fit the cartridge, making sure the filter top seal is correctly located flat and
centrally on the top cell plate.
5.4.4 Remove the Mini Micro abrasive valve from the bottom
of the blast pot and inspect it for wear. Check inside the
valve inlet port for any signs of wear on the valve body.
5.5.5 Dismantle the abrasive valve by removing the two (2)
retaining bolts. Check the condition of the valve plunger,
inspecting the wear or grooving in the end of the plunger.
The plunger should be replaced if the wear exceeds
1.5mm or if there are grooves present.
WARNING –The filter cartridge will become heavy when fully
dust laden. Use appropriate caution when releasing the filter
cartridge from the hanger rod.
WARNING –Breathing airborne dust from any abrasive media
may cause lung disease or other serious injury. Always wear
suitably designed respiratory protection when handling any
abrasive media and/or waste dust, and when in the
immediate area during any abrasive blasting operations.
CHECK INLET PORT
FOR WEAR
INSPECT VALVE
PLUNGER FOR
WEAR/GROOVING
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5.5.6 Check the condition of the urethane sleeve.
The sleeve should be replaced if the sleeve
ports have worn by more than 2mm.
5.5.7 Carefully re-assemble the Mini Micro valve, ensuring all seals and o rings are
correctly seated and positioned. Re-fit the assembled valve to the blast pot, using a thread
sealant to prevent any air leakage.
5.5.8 Remove the blast pot sealing band and move the pot
away from below the blast cabinet. Carefully inspect the
pop-up valve and o ring for any signs of wear and/or
grooving.
5.5.9 The pop-up valve and o ring can be replaced by removing the four (4) top flange retaining
bolts and lifting off the flange. It is recommended that both the pop-up valve and o ring
be replaced at the same time.
NOTE: It is vital that there are no air leaks in or around the
abrasive valve. Air leaks will cause very rapid premature wear.
INSPECT URETHANE
SLEEVE FOR WEAR
O RING
POP UP VALVE
TOP FLANGE
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