GBT GBTI-OS User manual
OPERATION MANUAL
The Greener Blast High
Performance Slurry Blasting System
Failure to operate this system in accordance with this operation guide could result is serious
bodily injury or catastrophic damage to the system itself.
It is the full responsibility of the owner of this machine to ensure that all operators read this manual,
and received proper training from a Greener Blast authorized factory representative. Operators must
be skilled as well as comfortable with the operation of this high performance slurry system to avoid
any chance of harm or injury.
All operators/pot tenders of Greener Blast equipment shall be knowledgable and well informed of the
proper safety requirements/policies set forth on any given project. These requirements (Respiratory
Protection, Personal Protection Equipment, etc.) are to be designated by operating company or at
minimum the OSHA guideline to fit the scope of any given project, which ever is deemed superior.
Failure to comply with company policies, OSHA regulations, and every day safe blasting habits can
result in harm or serious Injury.
Greener Blast Technologies, Inc. does not in any way promote or recommend the use of
potentially hazardous or unsafe materials. These include but are not limited to silica
sand, slags of any form. Please refer to each safety data sheet (SDS) prior to dispensing
any material from the Greener Blast system.
The production and performance of this machine is greatly impacted by the operator’s knowledge and
understanding of the functionality of the system. Insufficient knowledge of this unit will result in less
than optimal performance and potential harm to operator and/or unit.
In the repairing of this system only approved parts should be installed. Any unapproved alterations
regarding the functionality of the system could potentially void any and or all warranties provided with
the purchase of the Greener Blast system. In the event of any major machine damage or failure, it is
important that the local Greener Blast distributor or GBT factory is contacted prior to any repairs. This
will guarantee the fastest and most effective way to get the machine back up and running.
It is important that all owners and operators read and fully understand
the functionality and operations prior to operating the system.
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Table of Contents
This operation manual is universal and can be used to operate standard
& offshore models (with noted details).
Warranty 5
Greener Blast Package 5
Machine Diagram 6
Filling/Pressurizing Blast Vessel 8
Setting Pot Pressure 9
Setting Blast Pressure 9
Max Blast 10
Emergency Shut-Off 10
Operating the Machine 10
Rinsing Function 11
Surface Blow Down Function 11
Important Things to Remember 11
Recharging the Blast Pot 12
Blast Media Options 12
Air Flow Pressure Through Blast Nozzle- CFM 13
Trouble Shooting Tip 13
Water Pump Maintenance 14
Decommissioning Your GBT Unit 14
Using Rust Inhibitor 15
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Warranty
All factory Greener Blast Technology, Inc. (GBT) ultra symmetrical slurry blasting systems come
with a full one year warranty. GBT backs up 100% of all unit malfunctions and/or defects unrelated
to operator negligence for the year covered. If found that issues arise as a result of operator error,
becomes responsibility of the owner/operator at factories discretion. This warranty does not include
wear parts including but not limited to ball valves, hoses etc. All warranty claims are to be processed
through local dealer, in which case Greener Blast Technologies, Inc. will reimburse said dealer for
qualifying claims.
Greener Blast Package
Greener Blast High Performance Slurry Blasting System
11/4’’ x 50’ 2 Ply Blast Hose
1/2’’ Extended Performance Nozzle
50’ Twin Line
Dead man Switch/ Shutoff
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Blow Down
Valve
Certified
Lifting Lugs
Air Purge Valve
100 Gallon
On-Board
Water Tank
Lifting
Pockets
Main Pot Shutoff/ Slurry Hose
Control Panel
Relief Valve
(ASME Rated)
Inspection
Cover/
Hand Hole
FrontBack
MachineDiagram
Bung/Plunger
(located on top of Blast Pot)
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Emergency
Shut-Off
Surface Rinse
Pot Pressure
Regulator
Pot Pressure
Abrasive
Metering
Blast Pressure
Regulator
Blast Pressure
Air Supply
Pot Fill
Switch
Control Panel
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Filling/Pressurizing Blast Vessel
▪ Blast Selector Switch Set to “Off”
▪ Inlet Air Pressure set to 125psi min. & 140psi Max.
▪ Main Pot Shutoff/ Slurry Hose Closed
▪ Vessel Blow Down Valve Open (hoses in bucket)
▪ Purge Valve Closed
1. Fill pot with clean potable water until water begins to flow through the “blow down valve” into the
five gallon bucket.
2. Add abrasive media (See Blast Media Options chart on pg. 12) to the pot with blow down valve
open allowing the water to run into the buckets below. DO NOT put over flow water back into
reserve water tank.
Important!
Keep inside of portable water tank clean and grit free at all times.
3. Close “blow-down valve.” Use water captured in pail to fill the blast pot with water up to the top
outer rim of the blast pot.
4. Open “air purge valve” and allow air to escape.” (water level will drop a couple inches)
5. Top off the water until it is just below the lip of the pot and sits just below black ball on the pots top
bung. Open purge valve again for 3-5 second or until steady stream of water flows to ensure all air
is out of the vessel, then close.
6. Shake bung/plunger so that any air trapped on the back side is released. Turn dial on control panel
to “pot fill”. Gently increase pot pressure regulator until pump activatest, then pull the bung/plunger
up. Hold plunger up for a few seconds until the pot pressurizes and bung/plunger stays in place.
Close "air purge valve"
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Setting Pot Pressure
Pot pressure must be set 25-30 psi higher (Max Pressure:140 PSI) than target blast pressure in
neutral position (Differential can vary based on the abrasive being used).
Example: Target blast pressure = 80 psi, pot pressure should be set approximately 110psi.
1. When the vessel is purged and pressurized, slowly increase pot pressure (clockwise) until desired
pressure is achieved, while you are not blasting.The selector switch is still in “pot fill” during this
step.
Helpful Hint: Inside the control panel an in-line relief valve has been installed. If during this step the
maximum pressure (150PSI) is exceeded this valve will let go (making a loud humming sound). In
this case the pot pressure must be turned down until the humming stops. At this point pot pressure
can now be dialed back up.
If while setting the pot pressure, you happen to exceed the desired setting, simply back off on the
regulator slightly and crack the Air Purge Valve for a second to relieve the excess pressure and
repeat the step (Air Purge Valve is located on the Blast Pot).
Setting Blast Pressure
1. Selector switch is still in “pot fill” for this step. Have the operator activate the dead man control
and dial the blast pressure in to the target setting. Remember, this is 25-30 psi lower than where
you set the pot pressure to in the previous step. While blasting, blast and pot pressures should be
about equal.
Offshore Model (serial number GBTI-OS) and units with serial number G20074 and above:
Blast pressure can be adjusted in neutral state (Deadman control not activated).
Important Note (Compressors <375cfm): Compressed air volume is critical for the operation of this
machine. With compressors of 375cfm and less, this machine will max out compressors supply. If
so, while setting the blast pressure, watch the inlet supply pressure. If that begins to rapidly drop, you
have exceeded the capability of your compressed air supply. What does this mean? You will need
to get a larger compressor, pick a lower blast pressure, or reduce the blast nozzle size to reduce the
amount of compressed air being consumed (see attached nozzle/air consumption guide).
Pressures cannot be adjusted while machine is active. If you choose to reduce the target blast
pressure, you must start over and reset the pot pressure procedure. Trying to increase or decrease
the pot pressure settings while you are running the machine will result in inefficient, or no media
delivery. Initial blast/pot pressure setup prior to blasting is critical to the operation of the system.
Setting Max Blast
(Serial Number GBTI-G20222 and Above)
When operating with a compressor 450CFM and larger, gently turn pot and blast pressure regulators
clockwise until factory preset is reached. Do not force beyond this point as preset pressures are
critical. Over pressurizing could lead to failure of or damage to the machine. With machine in neutral
state, gauges will read ≈ Pot Pressure 130 PSI
≈ Blast Pressure 110 PSI
When operating with a smaller compressor, refer to “Setting Blast Pressure” instructions and the
“Important Note” on page 9.
Emergency Shut-Off
All Greener Blast units come equipped with an Emergency Shut-Off switch. This switch allow the units
operator to completely deactivate the machine with a quick and simple motion.
On/Run- System will function when dead man is activate.
Off/Stop- System will not activate.
Operating the Machine
1. You can now shift the main pot shut off/ slurryhose ball valve to the open position. Activate the
machine with selector switch in the pot fill position until material begins to exit the hose (This will
jump start the media flow). When material begins to exit nozzle selector switch can be flipped to
“blast”, and adjust abrasive metering as needed.
2. Start with the abrasive metering knob at “off”. Turn the knob counter clockwise to approximately
12 o’clock. Test blast a section of the substrate you are blasting and see if you are achieving the
desired production. If necessary, continue to turn the knob counter clockwise until you achieve
the desired result. Note: In most cases, you should not have to go beyond 1/2 turn of this dial (9
o’clock) to achieve the desired result. You are now ready to blast!
Helpful hint: As you are running the machine, make note of how the water pump is cycling (the
bang..bang..bang). When the abrasive is being metered properly, the pump should be stroking about
every 4-7 seconds this is what controls the abrasive flow. If the pump is cycling rapidly, or barely at
all, something is not set correctly.
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Rinsing Function
(WATER ONLY)
1. Main Pot Shutoff/ Slurry Hose valve is off
2. Blast selector switch set to off
3. Surface rinse selector set to rinse
4. Rinse away
Surface Blow Down Function
(AIR ONLY)
1. Main Pot Shutoff/ Slurry Hose valve is off
2. Blast selector switch set to off
3. Surface rinse selector set to off
4. You can now dry your surface
Important Things to Remember
1. When you are not blasting for any extended length of time, the main pot/slurry valve MUST
be closed. This is especially critical when the compressor is shut down (Blast hose will fill
with the remaining blast media).
2. The machine performs best with a #8 straight bore nozzle. # 6 - # 12 Straight bore nozzles can be
used effectively depending on the job requirements and the desired surface finish.
3. When you are blasting, the pot pressure and blast pressure will equalize somewhat, and show
different values than you selected during the set up phase. This is normal. Do not try to adjust pot
& blast pressures while running.
Recharging the Blast Pot
1. Close main pot/slurry valve
2. Turn blast selector switch the off position
3. Open blow down valve and discharge water into buckets
4. Begin to add desired abrasive once water stops discharging from the blow down valve
5. Top off water and repeat step 3 – 6 shown in filling/pressurizing procedure on Pg. 8 of this manual.
6. At this point, you should be able to switch the selector switch to blast and go back to work without
readjusting pot & blast pressures
Blast Media Options
Blast Media Lbs. Per Cubic Foot Machine Capacity
(5.5 Cubic Ft.)
Volumes may vary (Machine can be over loaded)
Garnet 140Lbs. 770Lbs.
Recycled Glass 100Lbs. 550Lbs.
Glass Bead 95Lbs. 522Lbs.
JetMag 82Lbs. 451Lbs.
Sodium Bicarbonate/Baking Soda 60Lbs 330Lbs.
Aluminum Oxide 110Lbs. 605Lbs.
DuPont Star Blast XL 145Lbs. 797Lbs
Numerous Others....
Replace(): (Machine can be over filled. Stop filling
when Bung/Plunger raises off tripod)
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Problem Corrective Action
Grit delivery is not smooth: (slugging/surging) Air pocket in vessel. Bleed purge valve and try
again
Pot/differential pressure is too low. Repeat initial pot & blast pressure steps
Blast Stream Seems wetter than it should be Pot/differential pressure is too high. Repeat
initial pot & blast pressure steps
Water Pump is not cycling Pump may be stuck between cycles, crack air
purge valve to get it cycling again.
Pump is cycling erratically Air was not completely relieved from pot.
Machine won’t develop any blast pressure
If compressed air supply is deemed sufficient,
the blast pressure regulator, or regulator pilot
valve may be malfunctioning.
Emergency switch must be in on position for
machine to function.
Cannot control pot pressure, or pot pressure is
maxed out during setup Pot pressure regulator may be malfunctioning
Pressure 50 60 70 80 90 100 120
Nozzle Size (Achievable blast pressure will vary depending on compressor)
#8 200 225 250 275 300 340 430
#10 300 350 400 450 500 550 680
#12 430 500 575 650 700 800 1,100
Air Flow Pressure Through Blast Nozzle- CFM
Trouble Shooting Tip
Water Pump Maintenance
Water pump maintenance is extremely critical as the pump is the center piece to your Greener Blast
machine functioning at an optimal level. Keeping your water pump running smoothly is quite simple.
Keep water tank clean of all grits!
Keep screen filter on pump inlet clean and restriction free, to ensure optimal water flow.
Decommissioning Your GBT Unit
Important! Always close main pot shutoff/slurry hose priot to turning off air compressor and opening
the system air purge valve (located under the air supply inlet) to ensure all compressed air is release
from the system before disconnecting your supply line.
Overnight/Short term:
1. Simply close off the Slurry Hose/ main pot valve.
2. Turn off your air supply and open system air purge. Pot can remain pressurized.
3. Your machine will be ready for blasting the following morning.
Long Term:
1. Close off the Slurry Hose/ main pot valve.
2. Activate dead man to blow blast hose clean.
3. Disconnect Slurry Hose/ main pot valve.
4. Open Slurry Hose/ main pot valve and allow material to flow out. This process can expedited with
the air compressor on and the machine switched to pot fill. Throttle the Main Pot Shut-off/ Slurry
Hose to ensure pot remains pressurized. This will force the material out under hydraulic pressure
rather than gravity.
5. Rinse inside pot until clean water runs out of Main Pot Shutoff/ Slurry Hose. This will remove any
and all potential media that may remain in the bottom bowl of your blast pot.
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© 2013 by Greener Blast Technologies, Inc.. All rights reserved. No part of this document may be
reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying,
recording, or otherwise, without prior written permission of Greener Blast Technologies, Inc..
6. Reconnect Slurry Hose/ main pot shutoff valve.
7. Your machine is now fully decommissioned and ready for long term storage.
Using Rust Inhibitor (Steel Only)
Use rust inhibitor of choice at ratio recommended by manufacturer.
1. Pre-charge blast vessel first with recommended ratio.
2. Add recommended product into 100 gallon on-board water tank.
(On recharge: Capture water in buckets and reuse to top off blast pot. DO NOT put back in 100 gallon
on-board water tank.)
This manual suits for next models
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