DUTLESS BLASTING DB500 User manual

DB500
USER MANUAL
®

The Future of Surface Preparation®
MMLJ, INC.
5711 Schurmier Rd.
Houston TX, 77048
[email protected]
Email
713-868-8041
Fax
[phone]
International
Facebook.com/DustlessBlaster
@DustlessBlaster
Youtube.com/MMLJManufacturing
Dustless_Blasting
800-727-5707
Toll Free

TABLE OF CONTENTS
Warning I
Warranty II
Diagrams and Part Lists
DB500®Model 1
DB500®Diagram 2
DB500®Parts List 4
Start Up and Shut Down Procedures
Getting Started 6
Shut Down Procedures 7
Maintenance and Best Practices
Maintaining your Blast Pot 8
Troubleshooting 10
Containment, Masking, and Nozzle Control 11
Switching from Wet Blasting to Dry Blasting 11
Storing Machine 12
Choosing Your Blast Pressure 13
Choosing Your Abrasive 14
Abrasive Comparison Chart 16
Resources and Training 17
A NOTICE TO INTERNATIONAL DISTRIBUTORS:
International Distributors are responsible for
translation of the manual.
Please read and understand manual fully prior
to operating any machinery.

IMPORTANT
(Pertinent to blast machines)
WARNING
Before operating any abrasive blast cleaning equipment
READ ALL operating and maintenance instructions.
Personal protective equipment is REQUIRED when using
this type of equipment. Operator MUST be equipped with
heavy canvas or leather gloves, aprons, and arm protectors.
Safety shoes and hearing protection MUST be worn when
required. NIOSH approved air fed respirators (helmets)
furnished with at least Grade D breathing air MUST be used
for protection against dust inhalation. Air MUST be ltered
and monitored for Carbon Monoxide.
DANGER.
Use of Abrasive cleaning equipment with silica sands may
produce a heavy concentration of silica dust. Breathing this
dust can produce “Silicosis”, a permanent lung disease.
Depending upon the object to be cleaned, blasting, even
with non-silica abrasives, may release hazardous dust
particles into the air that can cause permanent lung
damage. Failure to use NIOSH approved air fed respirator
(helmet) may cause SERIOUS lung DAMAGE. This warning,
as to the proper use of an approved respirator (helmet),
applies not only to the operator, but extends to all those
working in or around the blasting area, such as pot tenders,
painters, supervisors, etc.
CAUTION
Blast cleaning equipment and components are subjected to
wear and deterioration.
• Keep your equipment in good operable condition.
• MAINTAIN nozzle control at all times during operation.
• INSPECT machine, nozzles, hoses, and couplings.
• Inspect, clean, or replace helmet lens and lters frequently.
• Ground equipment to AVOID electrical shock.
• DO NOT operate any machine without thorough knowledge
of machine operation.
Carefully READ the INSTALLATION, OPERATING, AND
MAINTENANCE directions supplied with the machine from
the factory. If you do not have a copy, please contact your
employer (supervisor) or MMLJ Inc.
IMPORTANTE
(Relativo a todos maquinas)
ADVERTENCIA
Antes de operar cualquiera de los equipos de limpieza con
chorro abrasivo, LEA TODOS las instrucciones de operacion
y mantenimiento. ES OBLIGATORIO usar equipo protector
personal al manejar este tipo de equipos. El Operador
DEBE. estar equipado con guantes, delantales y protectores
de brazos de cuero 0 Iona pesada. DEBEN usarse zapatos
de seguridad y proteccion para los oldos cuando aSI se
exija. Los respiradores (cascos) alimentados por aire,
aprobados por NIOSH y que esten previstos de por 10
menos aire respi rable de Grado D, DEBEN ser usados como
proteccion contra la inhalacion de polvo. El aire DEBE ser
ltrado y controlado para detectar monoxide de carbono.
PELIGRO
Es posible que el uso de los equipos de limpieza por
abrasion con arenas sillceas provoque una concentracion
pesada de polvo sillceo. Este polvo, al ser respirado,
puede producir “silicosis”, que es una enfermedad
pulmonar permanente. Dependiendo del objeto que va
a limpiarse, es posible que la limpieza a chorro, aun con
abrasives no silfceos, provoque el escape de partlculas
de pohio pel igrosas en el aire que pueden causar dano
pulmonar permanente. Si nose usan los respiradores
(cascos) alimentados por aire, aprobados por NIOSH,
puede provocarse un GRAVE DANO a los pulmones. Esta
advertencia sabre el uso adecuado de un respirador (casco)
aprobado no solo se aplica al operador sino que comprende
a todos aquellos que trabajan en el area de limpieza a
chorro, 0 al rededor de la misma, como por ejemplo los que
vigilan los recipientes, los
pintores, supervisores, etc.
PRECAUCION
El equipo de limpieza a chorro y sus componentes estan
sujetos a desgaste y deterioro.
• Mantenga su equipo en buenas condiciones deoperacion,
• MANTENGA el control de la boquilla en todo momenta
durante la operacion.
• INSPECCIONE !a maquina, las boquillas, las mangueras y
las uniones.
• ALAMBRE juntas todas las uniones de la manguera de
rapido ajuste.
• lnspeccione, limpie 0 reemplace los lentes y  ltros del
casco frecuentemente.
• Conecte el equipo a tierra para EVITAR un shock electrico.
• NO opere ninguna maqu ina sin tener un detallado
conocimiento de la operacion de la misma.
LEA cuidadosamente las instrucciones de INSTALACION,
OPERACION Y MANTENIMIENTO que vienen incluidas
de fabrica con la maquina. Si no tiene una copia, slrvase
comunicarse con su empleador (supervisor) con MMLJ Inc.
I

II
BLAST POT WARRANTY
MMLJ, INC. LIMITED WARRANTY
IMPORTANT: Terms of Warranty
MMLJ, Inc. warrants that the product you have purchased is free from defects in materials or workmanship under normal use during the
warranty period. Your sales receipt, showing the data of purchase for this product, is your proof of the date of purchase. This warranty
is valid only if the product is assembled/installed according to the instructions included with the product.
During the warranty period, MMLJ, Inc. will repair or replace (at MMLJ, Inc.’s option) the product if it becomes defective or otherwise
fails to conform to this Warranty under normal use. In repairing the product, MMLJ, Inc. may replace defective part with new, or at the
option of MMLJ, Inc., serviceable used parts that are equivalent to new parts in performance. MMLJ, Inc. reserves the right to change
manufacturers of any part to cover any existing warranty. This extends to items normally covered by a manufacturer other than MMLJ,
Inc. used on this product within the rst calendar year of purchase.
This warranty does not cover shipping charges; export taxes, custom duties and taxes, or any other charges associated with
transportation of the parts or products. To obtain warranty service, you must contact MMLJ, Inc.’s customer service representative.
Any parts determined to be defective must be brought to the attention of MMLJ, Inc. within 6 months of delivery of equipment. You
must prepay any shipping charges, export taxes, custom duty taxes, or any other charges associated with transportation of the parts or
product. In addition, you are responsible for insuring any parts or product shipped or returned. You assume the risk of loss during the
shipment. You must present MMLJ, Inc. with proof-of-purchase documents (including the date of purchase). Any evidence of alteration,
erasure, or forgery of proof-of-purchase documents will be cause to void this warranty.
The warranties listed above do not extend to any product that has been damaged or rendered defective (a) as a result of accident,
misuse, or abuse (b) by the use of parts not manufactured or sold by MMLJ, Inc. and/or (c) by modication or improper installation of
the product. Product on which the serial number has been defaced or removed is not eligible for warranty service. Should any product
submitted for warranty service be found ineligible, an estimate of repair cost will be furnished and the repair will be made if requested
by you upon MMLJ receipt of payment or acceptable arrangements for payment. Except, as expressly set forth in this warranty, MMLJ
makes no other warranties, expressed or implied. This is the only express warranty applicable to Dustless Blasting® branded products.
MMLJ does not assume, nor authorize anyone to assume for it any other express warranty.
BLAST POT, LIMITED LIFETIME WARRANTY:
This warranty applies only to pressure vessels manufactured by MMLJ, Inc. under the Dustless Blasting® brand name. This product is
backed by a limited lifetime warranty, excluding only expendable parts such as gauges and valves (which are covered by manufacturer
other than MMLJ, Inc.) and paint.
This Limited Warranty does not extend to any product that has been damaged or rendered defective (a) as a result of accident, misuse,
or abuse (b) by the use of parts not manufactured or sold by MMLJ, Inc. and/or (c) by modication or improper installation of the
product.
IMPORTANT: Third Party Warranties
For parts that are not covered by MMLJ, Inc., please contact our ofce and report the defect. MMLJ, Inc. will then proceed with the
warranty process for the affected item on your behalf. All items not covered by MMLJ, Inc. will fall under a limited one year warranty
free of manufacturer defects.
For more warranty information, visit www.DustlessBlasting.com/legal/warranties.
Please call our ofce for any questions on warranties or warrantied items.
Toll Free: 800-717-5707
International: [phone]
[email protected]

1
Carefully read the INSTALLATION, OPERATING, and MAINTENANCE directions supplied with the machine from the factory.
If you do not have a copy, please contact your employer (supervisor) or the MMLJ Inc. Company.
This system will mix clean water, rust inhibitor, and abrasive together. The DB500®is designed to hold:
• 20 gallons of clean water
• 200 lbs of Abrasive, mesh size approx. 50/70
• 28 oz of Rust Inhibitor
INSTALLATION AND
OPERATING INSTRUCTIONS
PLEASE READ CAREFULLY BEFORE OPERATING
1
6
2
12
13
17
18
7
3
8
44
9
5
10
16 15
14
11
MODEL DB500 FIGURES
1. Pinch Hose
2. Control Box Input Couplings
3. Fill Port
4. Blowdown Valve
5. Air Inlet Valve
6. Compressed Air Inlet
7. Compressed Air Pressure Gauge
8. Pressure Regulator
9. Control Box
10. Blast Pressure Gauge
11. Rocker Arm
12. Vibrator
13. Bottom Flange
14. Overow Valve
15. Pinch Valve
16. Abrasive Control Knob
17. Vibrator Valve
18. Moisture Trap

2
NOTE:
ITEMS 24, 25 & 26
ARE INSTALLED ON
THE INSIDE OF
TANK.

3
39
40
38
44
44
42
43
41
45
45A
45B
45C
45A
45B
CONNECT ITEM 54 TO ITEM 56.
CONNECT ITEM 53 TO ITEM 37.
CONNECT ITEM 57 TO ITEM 52.
58
57K
57A
57H
57G
57J
57J
57L
57C
57D 57B
57
57F
57E
46A
35
35
36

Item No. Description Part No. Stock No. Qty.
1Outlet Elbow Assembly Complete M‐17 72856/001 1
1A Outlet Elbow Cap Bolts (4) M‐17‐D 82563/001 1
1B Outlet Elbow Cap M‐17‐C 131054/001 1
1C Outlet Elbow Cap Gasket M‐17‐G 131227/001 1
1D Outlet Elbow Insert Gasket M‐23‐G 131147/001 1
1E Outlet Elbow Insert M‐23 73602/001 1
1F Outlet Elbow Body M‐17‐B 80788/001 1
2 34‐1/2" Outlet Pipe (DB‐500) 500‐2 134613/001 1
3 Packing Gland Nut M‐5‐1 131102/001 1
4 Gasket M‐13 131226/001 1
5 Coupling Gasket M‐5‐G 131225/001 1
5A Seal (manufactured after 5/15/13) M‐6‐S 131226/002 1
6 Rocker Arm Adusting Screw AB‐8 73464/001 1
7 Rocker Arm B‐3‐1 73480/001 1
8 Abrasive Lever Clevis Pin w/ Cotter Pins AB‐11‐S 731070/001 1
9 Pedestal Clevis Pin w/ Cotter Pins AB‐12‐S 131069/001 1
10 Rocker Arm Hinge Yoke AB‐75 131113/001 1
11 Pedestal Locking Nut/Fill Cap Hold‐Down Screw Locking Nut AB‐75‐C 22926/001 2
12 Rocker Arm Acorn Nut (5/8"‐11) 134687/002 1
13 Rocker Arm Hinge Yoke Adusting Nut AB‐75‐E 131094/001 1
14 Connecting Link w/ Cotter Pins 131133/001 1
15 Abrasive Control Lever AB‐9 73500/001 1
15A Abrasive Control Lever Washers FBA 4
16 Wheel Cotter Pin C‐33‐C 72848/001 2
17 Wheel Washer C‐33‐W 72849/001 2
18 Wheel BF‐31‐2 133648/001 2
19 Air Inlet Body Gasket AB‐1‐G 131228/001 1
20 Air Inlet Nozzle (5/8") SB‐1‐NHD 134356/002 1
21 Air Inlet Body ABHD‐1 73478/001 1
22 Air Inlet Body Lug AB‐47 131231/001 2
23 Air Inlet Body Lug Bolts (2) AB‐47‐B 23879/005 1
24 1" x 9‐3/4" Nipple FG‐68 131400/001 1
25 1" Elbow AB‐61‐T 131867/001 1
26 1" x 3" Nipple AB‐61‐S 131861/001 1
27 1" x 3/4" Bushing AB‐61‐A 131860/001 1
27A 1" Plug (stand alone units only) 2
28 3/4" 90 Degree Street Elbow 131847/001 1
29 3/4" x 4" Nipple HC‐30‐N 131392/001 1
30 3/4" Blow‐Off Valve (red handle) AB‐61‐C 70239/001 2
30A 3/4" Blow‐Off Valve (blue handle) 133762/001 1
30B Safety Tag 1
30C 3/4" Check Valve 133051/001 1
30D 3/4" Crowfoot 132172/001 1
30E Crowfoot Gasket M‐G‐2 73850/001 1
31 3/4" Close Nipple RC‐23 131859/001 1
32 Blow‐Off Restrictor AB‐61‐R 68967/001 1
33 Fill Cap Assembly B‐60‐1 73856/001 1
33A Bolt AB‐60‐A 70241/001 1
33B Fill Cap handle w/ Safety Lock 131317/001 1
33C Button Bleeder BB‐1S 69953/001 1
33D Fill Cap Plate B‐60‐D1 131091/001 1
33E Washer AB‐60‐E 285781/001 1
33F Fill Cap Sleeve B‐60‐B 131031/001 1
33G Rubber Seal RING B‐13‐G 73620/001 1
33H Nut AB‐60‐F 77078/001 1
33J Fill Cap Bottom Plate B‐60‐R1 131095/001 1
33K Jam Nut 1
34 Fill Funnel 1
4

Item No. Description Part No. Stock No. Qty.
35 Vibrator Bolt, Washer, Lock Washer & Nut 2
36 Vibrator 133811/001 1
37 1/4" 90 Degree Street Elbow RC‐16 73813/001 1
38 Pinch Valve Plate 134611/001 1
39 Pinch Valve Mounting Bolts (2) 1
40 Pinch Valve Mounting Lock Washers (2) 1
41 KF Series Coupling Gasket KFG 131148/001 1
42 Elbow Adapter Bolts (2) KF‐17‐B 23858/001 1
43 Elbow Adapter, w/ Gasket KF‐17 80790/001 1
44 Elbow Adapter Flat Gasket KF‐17‐G 131149/001 1
45 Short Blast Hose Assembly 1
45A KF Series Coupling Gasket KFG 131148/001 2
45B Hose Coupling w/ Screws KF‐4 80837/001 1
45C 1" Blast Hose, Uncoupled 72635/001 1
46 Pinch Valve 74290/001 1
46A Pinch Valve Safety Cover (complete with screws)
47 1/4" Close Nipple 77094/001 1
48 Button Bleeder BB‐1S 69953/001 1
49 Brass Bushing DRC‐3‐B 73815/001 1
50 1/4" Tee RC‐19 131865/001 1
51 3/8" Air Hose Assembly (Pinch Valve) 1
52 Pneumatic Control Box 133303/500 1
52A Control Box Mounting Nuts & Lock Washers (2) FBA 1
53 3/8" Air Hose Assembly (Vibrator) 1
54 3/8" Air Hose Assembly (Air Inlet) 134798/001 1
55 Air Inlet Assembly 134798/002 1
55A Gauge SB‐30‐G 134366/001 1
55B Bushing AB‐30‐IC 131868/001 1
55C 1‐1/4" Tee AB‐30‐IT 131856/001 1
55D 1‐1/4" Close Nipple 131870/001 3
55E 1‐1/4" Regulator 132055/002 1
55F Gauge 70238/001 1
55G 1/4" 90 Degree Street Elbow RC‐16 73813/001 1
55H U‐Bolts w/ Nuts 131585/001 2
55J 1‐1/4" x 5" Nipple AB‐30‐N 131462/001 1
55K 1‐1/4" Ball Valve V‐99 70240/001 1
55L 1‐1/4" Check Valve 133040/001 1
55M 1‐1/4” x 1” Bushing (DB‐500 Only) 131837/001 1
55N 1” Hose Assembly (DB‐500 Only) 1
55P 1‐1/4" x 3" Nipple 131858/001 1
55Q 1‐1/4" Elbow 131855/001 1
55R Crowfoot 1
55S Crowfoot Gasket 1
56 Hose Adapter RC‐18 72828/001 1
57 Dual Line Activator Vavle Assembly DR‐3‐1 83619/001 1
57A Activator Valve Body DR‐3‐1A 83615/001 1
57B Activator Lever SDR‐3B 83616/001 1
57C Hex Head Bolt SDR‐3F 78963/001 1
57D Hex Head Nut SDR‐3G 78968/001 1
57E Seat Disc SDR‐3E 82617/001 1
57F Spring SDR‐3D 84067/001 1
57G Safety Stop SDR‐3H 83618/001 1
57H Spring SDR‐3S 84098/001 1
57J Hose Clamps RCAV‐5 72834/001 2
57K 1/8" Hose Adaptor DRC‐3‐A 131609/001 2
57L Round Head Screw SDR‐3J 27030/001 1
58 Dual Line Remote Control Hose DRC‐3‐50 72770/001 1
5

6
STEP 2. Filling the blast pot with abrasive
The DB500® is designed to hold:
• 20 gallons of clean water
• 200 lbs of abrasive (~50/70 mesh size)
• 28 oz of Rust Inhibitor
Getting Started
Connect Blast Hose Connect Twin Line
A NOTE TO BLASTER
Before blasting, it is recommended that user reads through
the entirety of this manual for proper operating procedures
and important maintenance instructions.
Always inspect machine, nozzles, hoses, and couplings
prior to blasting.
STEP 1. Connecting blast hose and twin line
Connect the blast hose to the pinch hose at the top of the
blast pot and insert the safety pin. Connect compressor
air hose to the air inlet and insert safety pin. The twin line
for your deadman controller must also be connected to the
control box on the back of the machine; red to red, green to
green.
STEP 3. Power up your compressor
Please refer to your compressor manufacturer’s manual
for operating instructions.
Before you start blasting, you will need to pressurize the
machine. Make sure the abrasive lever is unlocked, then
close the blow down valve, and open the air inlet valve.
When the machine pressurizes, you will see the abrasive
lever on the blast pot pop up.
Note: Open air inlet valve slowly to avoid sending
large amounts of compressed air into the machine
too quickly. This will cause unnecessary wear on the
system.
Note: A valve is in the open position when it is aligned
with the xture that it controls.
Note: The air inlet valve and blow down valve will always
be in opposite positions of each other.
Remove the ll cap by pulling the paddle up and turning the
cap counter-clockwise. Place the ll funnel in the opening
and pour in clean water. Then, pour in the amount of abrasive
that you need. If you are planning to use Rust Inhibitor, add it
to the blast pot now. Once complete, remove the funnel and
replace the ll cap. Everything will mix together during the
blasting process.
Note: Your machine will use any type of abrasive or cleaning
medium that sinks in water and is not water soluble.
Remove Fill Cap
Close Blow Down Valve Open Air Inlet Valve
SLOWLY
STEP 4. Start Blasting
• Make any necessary adjustments to abrasive lever by
rotating the rocking arm adjusting screw.
• Adjust the operating pressure with the valve behind the
lower gauge.
• Wear appropriate PPE gear.
• To activate blast hose, push the safety button in with
your thumb and slowly start pressing the handle of the
deadman controller.
Note: For best results, try different blast patterns and
angles to nd the best work ow.
Press Safety Button, then
Press the Paddle to Blast

7
Open Blow Down Valve
Close Air Inlet Valve
STEP 5. Shutting Down
While the compressor is running, close the air inlet valve
and open the blow down valve to release the pressure.
Let the blast pot fully depressurize before turning off the
compressor.
Note: If you turn the compressor off rst, the pressure in the
pot will backow air, water, and media into other parts of the
system, causing them to fail.

8
Maintaining your Blast Pot
CONTROL BOX MAINTENANCE
The control box has its own pressure regulator. This is already set properly from the factory, and should not be tampered
with. If it gets changed, make sure to readjust it to 90 PSI.
CONTROL BOX VALVE (LOCATED NEAR IN CONTROL BOX)
It is time to service your control box valve when the shutoff time is longer than usual or the valve is not actuating properly.
To service the control box valve (located in the control box), follow these steps:
1. Depressurize the machine.
2. Label each endcap left or right.
3. Remove the 2 (two) screws and set endcaps aside.
4. Remove piston.
5. Lightly lubricate piston with supplied grease or install new piston.
6. Install or replace any damaged gaskets or O-rings.
7. Re-install both endcaps.
PRESSURE REGULATOR
You should occasionally lubricate the threads on this knob with a lubricant such as lithium grease.
FILTER REGULATOR
You will nd the lter regulator on the left side of control box. The ltered moisture and debris will collect at the bottom
where it is vented through the screw. Leave the screw cracked open so it can let the moisture out continuously.
CONSUMPTION CHART
No damage to the machine will occur by leaving water and media inside of it. However, due to the organics in the media, a
foul smell can occur when left stagnant for longer than 24 hours. For this reason, when the machine will not be in use for
an extended period of time, it is recommended that you remove water and media from machine either by blasting it out or
by removing the bottom ange, air inlet jet, and gasket, and allow it to drain.
Blast pots do not need to be completely lled to operate. If maximum blast time is not needed, ll blast pot according to
required blast time.

9
The pinch hose can be rotated
and positioned in 4 ways:
1. Starting position
2. Rotate hose 180º
3. Flip hose around
4. Rotate hose 180º again
BLASTING WEAR PARTS
Certain parts wear faster than others and will require regular maintenance and inspection depending on the method of
blasting you are using as well as the abrasive you are blasting with. These items should be inspected for damage or wear,
and replaced an average of 400 hours if dry-blasting, or 2000 hours if wet-blasting.
Wear items include but are not limited to:
FLUSHING BLAST POT OUT
Regularly ushing the pot avoids buildup on inside walls, which could inhibit the system. Once a month or so, you should
rinse the pot out:
1. Fully depressurize machine.
2. Remove 2 bolts and 2 air inlet body lugs from bottom of machine.
3. Remove air inlet jet and gasket.
4. Push casting and air hose out of the way.
5. Flush out inside of equipment with water.
6. Once nished, replace the gasket, inlet jet, and lugs and bolts.
• Hardened Elbow Insert
• Hardened Air Inlet Jet
• Hardened Pipe
• Flat Backed Pinch Hose Coupling
• Inlet Jet Gasket
• Elbow Insert Gasket
• Elbow Cap Gasket
• Nozzle
TO REMOVE BRASS COUPLINGS FROM OLD HOSE:
1. Lock hose in vice and remove screw using a phillips head screwdriver or drill.
2. Unscrew the brass coupling from hose turning counter-clockwise. You may need a bar or rod to do this.
TO ATTACH BRASS COUPLINGS TO NEW PINCH HOSE:
1. Wrap the end of the hose in several layers of friction tape, slightly beyond the point the brass will cover.
2. Place coupling over friction tape and hose, screwing clockwise until hose end pushes against inside brass ridge of
coupling. You may need a bar or rod to get it tight.
3. Wrap screws with Teon tape and screw into designated holes until tight.
PINCH HOSE MAINTENANCE GUIDE
Rotate the pinch hose every 10-15 hours of blasting. Perform a visual and physical inspection to insure integrity. Look and
feel for signs of wear, softness, or bulges. Completely replace pinch hose before it fails at about 40 hours of use, or after
being rotated 4 times.
Rotate Hose 1800Flip Hose Around

10
MEDIA BUILD UP INSIDE POT - ADJUSTING VIBRATOR VALVE
On the left side of your control box, a small brass petcock valve controls the vibrator speed. This vibrator valve must be
open during blasting. Adjust it so that you feel maximum vibration at the head of the machine. This will insure that all of
the media gets “shaken” to the bottom of the tank.
Over time, you could experience abrasive buildup inside the pot which actually changes the harmonics of the pot. If the
system is not feeding right, adjust the valve by turning it towards the off position to slow the vibrator down, allowing the
pot to rattle more.
ABRASIVE NOT FLOWING CORRECTLY - Assuming proper Installation, air pressure, and abrasive.
Check media quality. Your machine is made to run with clean, high quality abrasive or media. Dirt will get muddy and clay
will harden.
NOTHING IS COMING OUT OF THE NOZZLE
The blast nozzle may become clogged with debris or blast media. If this occurs, put the machine in the blowdown
position, then remove the nozzle and inspect for a rock or other foreign material.
PINCH VALVE NOT OPENING OR CLOSING
1. Put the machine in the blowdown position.
2. Does the pressure gauge on the bottom left side of the control box read 80?
3. Are all ttings tightly secured to the deadman and the back of the box?
4. Is air bleeding out of the deadman?
IF YES
1. Unscrew the green hose from the control box.
2. Depress the deadman and verify air is coming out of the green hose.
If air is coming out of green hose:
1. Remove control box front panel and follow instructions for cleaning the control box valve.
2. Check that the O-Rings on the piston are not torn. If torn, order a repair kit. This part number is located on control box
back panel.
IF YES
1. Remove red hose from deadman to verify if air is coming out of it.
2. If no air is coming out, unscrew the red hose from control box and verify air coming out of it.
3. Remedy: Air line needs to be blown out to clean debris in line, and check to see if seat disk is worn.
Troubleshooting
Please call the manufacturer directly with any additional maintenance questions.
1-800-727-5707 | suppor[email protected]

11
CONTAINMENT
To capture the blasting byproducts use heavy plastic or a tarp. Lay out your plastic and weigh the corners down, placing
your project in the center. You can sweep up media or use simple curtains or barriers.
MASKING
Mask off any glass, chrome, rubber seals, wiring, electrical, or moving mechanical parts and anything else that looks
delicate or like it shouldn’t have water and grit inside it. Tape works the best for protecting small parts and pieces.
NOZZLE CONTROL
It is important to use the proper nozzle to achieve the best blasting results. Nozzle size is based on air compressor size.
NOZZLE KNOWLEDGE
SLV Nozzle
• Wide blast pattern
• All purpose nozzle
ST Nozzle
• Straight bore nozzle
• Tight blast pattern
• Detailed precision nozzle
Fan Nozzle
• Spreads blast pattern out to cover a rectangular area
• Perfect for brush blasting
• Low impact compared to other nozzles
XL Performance Nozzle
• Increases abrasive particle velocity
• Allows for increased standoff distance while improving production and efciency
CLEANUP
Depending the amount of media used, plastic may be too heavy to move all at once. Cut it into sections and roll it up, or let
the water evaporate to sweep or vacuum.
Containment, Masking, and Nozzle Control
BLAST WET, DRY, OR WITH SODA (AIR DRYER AND COOLER REQUIRED)
To prepare your machine for dry blasting:
1. Blast all media and water out of machine.
2. Remove ll cap.
3. Turn on air dryer and cooler.
4. Open air inlet valve halfway and let air circulate through machine for 5-7 min or until completely dry.
5. Put ll cap back on machine and pressurize tank.
6. Run air through the machine just like you were blasting for 2-3 min.
7. Shine light in machine to be sure all moisture is gone from the bottom.
8. If no moisture, ll with 1 bag of dry abrasive. Fill the remainder of the way.
Note: Using media such as plastic bead, walnut shell, corn cob, or soda requires dry blasting.
Switching from Wet Blasting to Dry Blasting

12
STORING MACHINE
If leaving unit for extended period of time, you should blast the water and media out of machine OR:
1. Fully depressurize machine.
2. Remove 2 bolts from bottom ange of machine.
3. Remove 2 lugs from bottom ange.
4. Push casting and air hose out of the way.
5. Remove air inlet jet and gasket.
7. Flush out inside of equipment with water.
Once media and water are out of machine, reverse procedure:
1. Put gasket on air inlet jet.
2. Insert air inlet jet and gasket.
3. Put casting up to bottom of machine.
4. Use lugs and bolts to secure casting.
STORING MACHINE IN WINTER
If storing your machine for the winter months, it is advised to take the following precautions to prevent damage from
freezing.
• Open all of the ball valves on your unit to prevent moisture from freezing and expanding in the valve.
Note: If wet blasting in the winter time, consider the following:
• At 32°F add rubbing alcohol to the water tank at roughly a 1:100 gallon ratio.
More alcohol can be added if necessary, up to 1:20 ratio.
• Tent around the pot, pump and moisture separator and place a heater inside to keep warm.
• Empty tank and blow out hoses.
Storing Machine

13
BLAST PRESSURE
Different materials and coatings call for different pressures or blasting distances. Thick metal can handle a lot of
pressure, while sheet metal could be dented by using too much pressure. Simple paint may come off nicely with the
nozzle far away, while tough undercoating may come off better with the nozzle closer.
The distance you hold the blast nozzle from the material affects the harshness and speed of the blast and changes the
"blast pattern" size. If you hold the nozzle too far away, the blast pattern will be big, but the coating will come off too
slowly. If you hold the nozzle too close, the coating will come off quickly, but the blast pattern will be small. With a tiny
blast pattern you'll have to move your arms a lot more to cover some area, which is inefcient. The best things is to nd a
nice balance between blast pattern size and removal speed.
ADJUSTING BLAST PRESSURE
The Dustless Blasting®system allows you to easily change the blast pressure by turning one simple knob. The higher the
pressure is, the higher your productivity. Obviously lower pressures are more gentle on whatever substrate you're blasting.
If you need to blast on softer material or very thin metal, lowering the pressure is a good idea to prevent damage.
A clockwise rotation of the pressure regulator knob will increase the pressure, while a counter clockwise rotation will
lower pressure. If you try to lower the pressure while the blast tank is pressurized, you'll need to either have someone blast
simultaneously, or just open the blowdown valve slightly to release some of that pressure.
COMMON GUIDELINES
Marine
On thick steel like ship hulls, you can operate at about 150 PSI. Fiberglass requires a lower pressure — about 70 PSI —
with a larger standoff distance.
Automotive
For most automotive uses, 120 PSI is ideal. Find a balance between blast pattern size, and speed.
For thick aluminum like a large trailer, you can blast at up to 150 PSI.
Grafti Removal
For removing grafti from a brick wall, use about 100 PSI so you don't etch the brick. The grafti will still come off quickly
at this low pressure.
Here is a chart of some suggested blast pressures:
*The closer the nozzle is to the blast surface, the smaller the blast pattern.
Fiberglass
Boats
Blast Pressure
Blast Distance
Blast Pattern
70 PSI
18-24 in.
Large
Metal
(Auto)
100-120 PSI
12-14 in.
Medium
Aluminum
120-150 PSI
12-20 in.
Medium-Large
Steel
150 PSI
10-14 in.
Medium
Brick
100 PSI
18-24 in.
Large
Choosing Blast Pressure

14
For example, if you are stripping a car to be repainted, you'll probably want to leave an anchor prole for the new paint
to adhere to. If you are simply cleaning calcium deposits from a pool — which will not be repainted — leaving a prole is
unnecessary.
ABRASIVE SIZE
Most abrasive is measured with mesh size. During production, it gets
shaken through various screens. These screens might have as little as 20
holes per square inch, or as many as 100. This means that 40/70 glass ts
through the 40–70 holes per square inch screens. 20/40 glass is coarser
than 40/70, and 60/100 glass is ner.
An anchor prole is a fancy way of describing the rough surface
created during the blasting process. These peaks and valleys are
usually measured in mils (1/1000 of an inch). One of the main causes
of premature coating failure is an insufcient anchor prole. Its a good
idea to understand from the customer what he/she expects when you
are done. Some people prefer an anchor prole, while others will want a
smoother surface.
WHAT IS ABRASIVE?
Abrasive (also called media) is mixed with water inside the blast tank. When blasting, you propel this mixture towards a
surface at high speed, to remove paint, rust, and other coatings.
TYPES OF ABRASIVE
Dustless Blasting®allows you to use a wide variety of abrasives, either wet or dry. For wet blasting, any abrasive that sinks
in water and is not water soluble can be used. However, abrasives that are dirty or have a very inconsistent particle size
can cause problems, such as sputtering or clogging of the machine.
Our favorite abrasive is recycled bottle glass, because it's clean, inexpensive, environmentally friendly, and suited for a
wide variety of jobs. Sometimes different abrasives are available simply based on geography.
A common question we get is "Can I use play sand?" The answer is NO. Play sand is not an industrial product, so it's not
controlled and graded the way abrasives are. It won't behave predictably in your equipment, and you could wind up in
loads of legal trouble, from the EPA to local municipalities. Most bags of play sand are explicitly marked "Not to be used
for sandblasting".
ABRASIVE SHAPE
Basically, there are two different shapes: angular which has sharp edges, and round with no edges.
Angular abrasive has sharp edges which will cut into the substrate, leaving an anchor prole for the new nish to stick to.
Examples of angular shaped media would be crushed glass, slags and garnet abrasives to name a few.
Round media is used mainly for cleaning or stripping while leaving the surface smooth. It will not rough up the surface or
leave an anchor prole. Examples of round media would be glass beads, sugar sand and plastic pellets.
Looks Like
20/40
40/70
60/100
ANGULAR ROUND
Choosing Abrasive