DUSTLESS BLASTING DB350 Mobile XS User manual

DB350® Mobile XS User Manual
Warning: Do not use this equipment until you have read the manual
and understand the contents. *User safety is always a
top priority. However, the safety of an intended user
can only be protected if outlined precautions are read
and followed carefully. *International Distributors are
responsible for the proper translation of this manual.

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TABLE OF CONTENTS
I. Introduction………………………………………………………………………………………..….5
Notice Symbols……………………………………………………………………………………..5
Warranties……...…..……………………………………..……….……………………………..6.7
Safety Overview………………..…………………………………………………………………..8
Mobile Safety Overview……………….…………………………………………………………..9
II. Abrasives……………………………..………………………..……………..…………….…………10
Selecting an Abrasive……………………….………………………………………….………….10
Abrasive shape……………………………………………………………………………..10
Abrasive size, density, and hardness……………..……………………………………….10,11
Media Comparison Charts………………….……………………………………….……….…...11
Figure 3. Dry Blasting Abrasive………………………………………………..…….……..11
Figure 4. Wet or Dry Blasting Abrasive………….…………………………………………12
Abrasive Fill Levels………………….…………………….………………………….……….…..13
III. Preparing to Blast………..........…………………..…………………………………….………14
Personal Protective Equipment………………………....……………………………………….14
Masking and Containment……….……………………...……………………………………….14
Model DB350® Mobile XS Overview.………………………………………..…………..……….15
Model DB350® Blast Pot………………...…...……………………………….…………………….16
IV. Blast Pot Start Up……………………………….……………...…………………………………..17
i. Connecting the Blast Hose and Electric Line to the Blast Pot……..………….……………..17
ii. Fill the Blast Pot with Water………………………………………...………….……………..18
iii. Fill the Blast Pot with Abrasive……..………………………………………….……………..19
v. Pressurize the Blast Pot……..…………………………………………………...……………..20
V. Active Blasting……….………………….……………………………………...……………………..21
Begin Blasting……………………………………………………...…………………...…………21
VI. Blast Pot Shut Down……………………………….…………….…………………………………22
VII. In Process Adjustments………..…………………………….………….…..…….………………23
Adjusting Abrasive Flow Rate…..…………….…...……………………………….……….…...23
Increasing media flow…………………………………………………………..…….……..23
Decreasing media flow………….……………………………………………………………24
Adjusting Operating Pressure…..…………….…….....……………………………….………....24
Adjusting Blast Distance…..………………………...……………………………….……….…...24

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VIII. Transitioning from Wet to Dry Blasting ………………...………………………………..…25
IX. Machine Storage………………………………………..……………………………………………26
Storing the Machine in Cold Climate…………....…………………………………………….…26
Blasting in Freezing Temperatures………………….………...……………………………….…26
X. Transportation…………………………………….……..……………………………………………27
Trailer Transportation and Safety…………….…………………………………………………..28
Trailer Hook Up Procedure……..……...………………………………………………………….28
Moving the Blast Pot from the Trailer……..…………………………...…………………………29
Removing the Blast Pot…………………………………..…………………………………29
Replacing the Blast Pot…………………………………….…..……………………………29
XI. Maintenance……………….……………...…………...………………….…………………………..30
Control Box…………….………………...……………...………………..…………..……………30
Pressure regulator…………..……….……………….…..…………………………………30
Control box Parker valve………….…..………………………….……….…………...……30
Blast Pot Pressure Regulator…………….………….……………………………………………..31
Filter Regulator……..……………...…...………………………………………………………….31
Blast Hose……..……………………………………………………..…...…………………………31
Moisture Trap ……..………............………………………………..…...…………………………31
Water Pump……..….………………………………………………..…...…………………………31
General Blast Pot Maintenance……………………………………..…...…………………………32
Flushing the blast pot……..….………………………………..…...…………………………32
Blasting wear parts……..…....………………………………..…...…………………………33
Pinch Hose Maintenance…………….………………...………………..…………..……………34
Using the pinch hose…………..…………………….…..…………………………………34
Removing the brass couplings from an old hose………….…..………….…………...……35
Attaching the brass couplings to the new pinch hose…….…..…………….………………35
Compressor Maintenance……………...……….……...………………..………………………35
Contacts for compressor support…………..……...………………..………………………35
Preventative Maintenance……………...……………...………………..………………………36
Daily maintenance…………..………………...…….…..…………………….……………36
Weekly maintenance………….…..…………………..…………..…………………...….…37
Monthly maintenance…….…..…………………………………………………..….………38

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XII. Troubleshooting………………………...…………...………………….…………………………..39
Media Buildup Inside the Blast Pot……………………..………………………………………..39
Adjust the vibrator valve…………..………………….…..…………………………………39
Abrasive Flowing Incorrectly……………………..……..………………………………………..39
Check installation and air pressure……………………...………………….…..……………39
Check media quality………………………………….…..………………….…..……………39
Nothing Coming from the Blast Nozzle……………………..……..……………….……………..39
Pinch Valve is Not Opening or Closing (Electric)…..……..…..……………….……….………..39
Pinch Valve is Not Opening or Closing (Pneumatic)….......…..……………….……….………..40

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I. INTRODUCTION
Notice Symbols
For operator safety and machine preservation, please pay careful attention to the special notices listed
in this manual.
A point of emphasis or reminder for operator. Can also indicate potential for
minor problems
Potential for damage to equipment or problems in the outcome if statement is not
closely followed
Note
DANGER
Warning
Caution
Possibility of minor injury to operator or bystanders
Possibility of serious or fatal injury to operator or bystanders
This manual covers the start up, operation, storage, maintenance, and troubleshooting, for a DB350®
Mobile XS. Intended users must read and understand the contents of the instructions before operating
their machine and its accessories. The intended user should be able to safely operate the blast machine
and be aware of the hazards associated with blasting.
Proper personal protective equipment is required for the operator and any supportive personnel. This
includes but is not limited to hearing protection, eye and face protection, helmet, leather gloves protecting
the full forearm, safety shoes or boots. To protect from dust inhalation, NIOSH-approved air fed
respirators with at least Grade D breathing air is required.
The blast pot is ASME, NB, CE, and/or PED certified. Welding, grinding, or drilling on the pot
voids the National Board approval and manufacturer’s warranty. Such actions may affect the dimensional
integrity of the blast pot. The compressor has the required safety relief valve to prevent
the rise of pressure no more than ten percent of the set MWP as required by ASME section VIII,
Div. 1. The design maximum and minimum parameters shall not be exceeded. See the parameters in
Figure 1 below. Be sure to read all warnings listed on the blast pot before operation. See Figure 1.1
below for more information.
Figure 1. Name plates Figure 1.1 Blast pot warning label

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Warranties
MMLJ, Inc. Limited Warranty
Full One-Year Warranty
MMLJ, Inc warrants each new product manufactured by us to be free from defects in material and
workmanship for a period of one year from date of delivery to the original purchaser except as noted below.
This one-year warranty covers the entire trailer against material and workmanship except as noted:
1. New products which have been operated in excess of rated capacities
2. Misuse, abuse or accidents
3. Items that have been pinched (air or hydraulic hose)
4. Vehicles which have been altered, modified or repaired in any manner
5. Second-hand or used vehicles
6. Wear items such as tires, battery, suspension, bearings, parking jacks
7. Products that have not been properly maintained (by the consumer) In no way shall the
manufacturer be held liable for consequential damages such as rentals of substitute vehicles, loss of
profits, downtime, or other commercial losses.
MMLJ, Inc’s Obligation
Our obligation under this warranty is to repair or replace (at MMLJ, Inc.’s option) at no cost to the end user,
any warrantable part proven defective within the time limit of this warranty at our factory. We must receive
immediate notification of a defect and no allowance will be made for repairs without our prior consent or
approval. Manufacturer does not pre-authorize any dealership for warranty work. 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. 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.
Defective parts must be returned within twenty days of receipt of replacement parts or credit may not be
given for the replacement parts and an invoice may be issued.
This warranty is in lieu of all other warranties, expressed or implied by law or otherwise, and there is no
warranty of merchantability or fitness of purpose. Federal regulations require motor vehicle manufacturers to
maintain a record of original owners of their equipment. Our warranty registration fulfills this requirement.
This warranty was written under the laws of Texas, USA.
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 manufacturers 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 lack
of maintenance, accident, misuse, or (b) abuse by the use of parts not manufactured or sold by MMLJ, Inc.
and/or (c) by modification or improper installation of the product.
Third Party Warranties
For parts that are not covered by MMLJ, Inc., please contact our office 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.
Warranty Claims
MMLJ, Inc reserves the right to modify, without notice, specific designs, specifications and policies
(including warranty policy) as they see fit without obligation in regards to products previously sold. The
manufacturer also reserves the right to discontinue any model or policy without obligation in regards to
previously sold products.

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Trailer Limited One Year Warranty
MMLJ, Inc. (under the name Dustless Blasting®) warrants 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. MMLJ, Inc warranties the trailer main frame
(frame, crossmembers, gussets, and tongue) to the original licensed owner to be free from defects in material and
workmanship with the following conditions: This LIMITED WARRANTY does not cover the hitch (ball, pintle),
tires, wheels, axles, suspension, lights, wiring, paint, or any other features or options outside the scope of the
trailer main frame weldment. Limited Warranty is to the original owner and is non-transferrable. It is limited to
the first accident or overloading. This warranty does not cover: 1. Products which have been operated in excess
of rated capacities 2. Misuse, abuse or accidents 3. Vehicles which have been altered, modified or repaired in any
manner
Compressor Warranty
Compressors used as part of a Dustless Blasting® mobile unit are covered under the Manufacturer’s Limited
Warranty. The compressor itself is not a product of MMLJ, Inc. and MMLJ, Inc. will not be held responsible for
the repair or replacement of said product. Original purchaser must verify that MMLJ, Inc. has submitted ELGI
warranty registration on your behalf. Please refer to the Manufacturer's Product Limited Warranty for more
information regarding your compressor warranty.
Tire Manufacturer Warranty
Tires used as part of a Dustless Blasting® mobile unit are covered under the Tire Limited Warranty. The tires
themselves are not a product of MMLJ, Inc. and MMLJ, Inc. will not be held responsible for the repair or
replacement of said product. Original purchaser must verify that MMLJ, Inc. has provided you with a tire
warranty registration card.
Water Pump Warranty
Water pump used as part of a Dustless Blasting® mobile unit is covered under the Water Pump Limited
Warranty. The pump itself is not a product of MMLJ, Inc. and MMLJ, Inc. will not be held responsible for the
repair or replacement of said product. Original purchaser must verify that MMLJ, Inc. has provided you with an
All-Flo warranty registration card. Please refer to the All-Flow Warranty for more information in regards to your
water pump warranty.
Axle Manufacture Warranty
Axles used as part of a Dustless Blasting® mobile unit are covered under the manufacture axle Limited Warranty.
The axles are not a product of MMLJ, Inc. and MMLJ, Inc. will not be held responsible for the repair or
replacement of said product.
Warranty Claims
MMLJ, Inc must receive immediate notification of a defect in material or workmanship in order to expedite the
warranty service.
Defective parts must be returned within 20 days of receipt of replacement parts or you will be invoiced for those
parts. MMLJ, Inc does not pre-authorize any dealership for warranty work. These procedures must be followed or
the warranty will be null and void. 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. If directed by
the warranty and service department to return components, ship items to:
5711 Schurmier Rd
Houston, TX 77048
For more warranty information, visit www.DustlessBlasting.com/legal/warranties.
Please call our warranty department for any questions on warranties or warrantied items.
Phone: [phone] Email: [e-mail]

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Safety Overview
-
Personal Protecve Equipment
(PPE)
Remote
controls
ASME blast pot
Blast hose
Blast pot
Protective Equipment (PPE). Follow all OSHA
guidelines for PPE before, during, and after the
blasting process.
Remote controls. Never attempt to bypass the
remote (safety) controls on the blast pot setup. A few
important safety points to ensure are in proper
working condition are the deadman control, pinch
valve, and pinch hose.
Abrasive. Media must be suitable for blasting and
the conditions the operator chooses to blast in i.e. wet
or dry blasting. Do not use abrasives with more than
one percent crystalline silica. Be sure to check an
abrasive’s Safety Data Sheet for more information on
media contents.
Blast pot. The DB350® is designed to blast for
approximately 45 minutes. Inspect the machine,
nozzles, hoses, and couplings before operating. Make
sure to ground the equipment before use to avoid the
risk of electrical shock. Wire all kwik-fit couplings
together. Keep the machine in safe, operable
condition. Read all warnings on the pot before
operation.
Compressor. Air compressor should be properly
maintained and sized to provide adequate CFM for the
tools in use. Excessive compressed air pressure can
cause a blast machine to rupture. Be sure to read and
understand the compressor user manual before use.
Blast hose. Avoid crimping the blast hose when
using. Check the hose for wear before use. Make sure
all safety pins are in place when attaching a blast hose.
Pressure can cause the hose to disconnect and can
inflict serious injury or death.
Air filter. Used with NIOSH-approved respiration
equipment to remove air contaminants. Follow the
manufacturers requirements for replacing these filters as
necessary. Air filter does not detect or remove carbon
monoxide.
Gas monitor. When using a respirator, always be
sure to have a working gas monitor. This helps to
protect against potential for carbon monoxide
poisoning and monitoring levels of other gases, such
as oxygen, with the operator’s NIOSH-approved
respirator.
NIOSH-approved respirator. Respirators can only
give a satisfactory level of protection when they are
selected, fitted, used, and maintained according to the
manufacturer’s written instructions, NIOSH
guidelines, and OSHA requirements. Replace helmet
lens and filters frequently.
Appropriate blast nozzle. Check the nozzle for wear
before use. Be sure the selected nozzle is appropriate
for the amount of air pressure in use.

9
-
Remote controls. Never attempt to bypass the
remote (safety) controls on the blast pot mobile setup.
A few important safety points to ensure are in proper
working condition are the deadman control, pinch
valve, and pinch hose.
Operator. The mobile operator must read and understand
the manual and special notices before operating or
transporting the mobile machine or trailer. Failure to
consider the risks of operation or transportation can result
in injury or death.
Trailer. Never haul the trailer in unsafe weather
conditions, on unsafe surfaces, or dangerous grades.
This trailer is not tested or intended for human or
animal transportation. Park in a controlled, safe
environment on level ground. Be aware of operation
surroundings when parking and blasting.
Trailer safety controls. Always make sure the trailer
jack is in proper position before attempting to move
the mobile unit. Connect the emergency brake clip wire
when transporting the trailer. Failure to do this can
result in significant damage to the machine. Be sure to
periodically test the trailer lights to make sure they are
functioning properly.
Abrasive. Media must be suitable for blasting and
the conditions the operator chooses to blast in i.e. wet
or dry blasting. Do not use abrasives with more than
one percent crystalline silica. Be sure to check an
abrasive’s Safety Data Sheet for more information on
media contents.
Blast pot. Make sure the blast pot is empty before
attempting transportation. Use lift equipment that is
suitable for weight heavier than the machine and
attachments. Do not blast while the trailer is in motion.
General transportation. See the specific
transportation vehicle owner manual for tow capacity.
Never attempt to tow a mobile trailer with a vehicle
not graded for the weight of the mobile. Ensure the
trailer weight is never overloaded and always
balanced on level ground.
Load distribution. Never overload the trailer. If there
is media stored on the trailer, the water tank must be
filled to evenly distribute the weight.
Protective Equipment (PPE). Follow all OSHA
guidelines for PPE before, during, and after the
blasting process.
Mobile Safety Overview

10
II. ABRASIVES
DANGER: No dust is safe to breathe. Abrasives may contain toxic materials that are
hazardous to persons in the blasting area when inhaled.
Do not use abrasives containing more than one percent crystalline (free) silica. Inhaling
crystalline silica sand can cause silicosis, lung cancer, and breathing problems to exposed
persons.
Slags can contain trace amounts of toxic metals such as arsenic, beryllium, and cadmium
and have the potential to cause lung disease.
Be sure to obtain a Safety Data Sheet (SDS) for the chosen blasting abrasive and identify
the potential for any hazardous substances.
Selecting an Abrasive
Caution:
Use abrasives or media specifically manufactured for blasting. Consider the following information
on choosing abrasives carefully as the type of abrasive can affect blasting efficiency, surface finish,
and machine integrity. Check local environmental guidelines for potential restrictions of certain
abrasive use before blasting. If blasting an unfamiliar surface, test abrasive selection on a small
portion of the surface.
Abrasive shape
Angular. This type of abrasive has irregular edges
that create a textured surface in the blasting
substrate. A textured or anchored surface is ideal
for paint or finishes.
Round. Smooth edges on a rounded shape
abrasive will leave a surface smooth. When the
goal of blasting is to clean a surface without
needing to create texture, a smooth shape will give
the desired profile.
Abrasive size, density, and hardness
Size. Most abrasives, or media, are measured by their
mesh size. An abrasive’s mesh size is defined by the
number of holes in a screen the media can pass through
per square inch. Refer to Figure 2 for a visual
representation of common mesh sizes.
Figure 2. Common mesh sizes

11
Density. Knowing the weight or bulk density of an abrasive can help an operator choose the
appropriate abrasive for the job. The density is measured in pounds per cubic foot, so an
abrasive with a bulk density of 75 lb/ft3 is less dense than a sample of 145 lb/ft3. The higher
the bulk density, the more impact the abrasive will have on the blasted surface.
Note: Choosing a coarser media will not always increase productivity. The user should
consider mesh size, density, and hardness of an abrasive when factoring productivity and
end surface goal.
Hardness. Generally, a harder abrasive will impact the blasted surface profile more than a
softer abrasive. A softer media, such as organic materials and plastics, is sufficient for
removing dirt, oil, grease, and paint without damaging the target surface. An abrasive’s
hardness may be measured in a couple ways. A common quantitative figure comes from the
Mohs hardness scale. The media will fall on a scale of 1-10. 1 being the softest media and
10 being the hardest.
Media Comparison Charts
Description Bulk
Density Hardness Surface Profile Surface Removal Velocity
Sugar Sand Round media used for cleaning
and stripping 100 lb/ft36 – 7 High etch Yes Medium fast
Sodium
Bicarbonate
Medium-sized abrasive, creates
a smooth surface when
stripping 61 lb/ft32.5 No etch No Slow
Walnut
Shells
Angular, organic for mildly
powerful stripping without
damage to the blast surface 50 lb/ft34.5 – 5 Low etch Very slight Medium
slow
Corn Cob Organic, soft media ideal for
soft surfaces like wood 40 lb/ft34 – 4.5 No etch No Slow
Selecting the appropriate abrasive for the job is important to maintain efficiency, conserve
media, and protect the integrity of the blasted surface. Figure 3 and Figure 4 below show a few
examples of potential media an operator may choose to use. Dry blasting specific media cannot
be used in wet blasting as the listed abrasives do not sink in water, a key parameter for successful
wet blasting.
The below figures are arranged from most dense to least dense media. Additionally, each
abrasive has a listed hardness value, surface profile, surface removal ability, and velocity (how
fast or slow the media travels from the blast pot) description.
Figure 3. Dry Blasting Abrasive

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Description Bulk
Density Hardness Surface Profile Surface Removal Velocity
Steel Grit Angular for fast
stripping and aggressive
cleaning
260 lb/ft340 – 65
HRC High etch Moderate Medium fast
Steel Shot Spheres designed for
polishing and peening 230 lb/ft340 – 51 HRC No etch No Medium
Aluminum
Oxide
Sharp, long lasting
media for fast etching
and profiling 110 lb/ft38 – 9 High etch Yes Fast
Blast Sand Angular, sharp edges to cut into the surface and
leave an anchor profile 100 lb/ft37High etch Yes Medium
fast
Crushed
Glass
Free from crystalline
silica, 100% recycled
glass, efficient, cost-
conscious
100 lb/ft35 – 6 Medium-
high etch Slight Fast
Glass
Beads
Round, soda-like glass
produces a bright, satin
finish. 95 lb/ft35 – 6 No etch Slight Medium
fast
Silicon
Carbide
Hard, powerful cutting
media, ideal for stone,
glass, and tough
surfaces
90 lb/ft39 – 9.5 Very-high
etch Yes Very fast
Garnet Angular, hard media
commonly used in place
of silica sand 85 lb/ft37.5 – 8.5 Very-high
etch Yes Very fast
Coal Slag
Angular byproduct of
coal, used for removal
of coatings from steel
and concrete
85 lb/ft36 – 7 High etch Yes Medium
fast
Plastic
Abrasives
Soft media for
automotive and
aerospace applications
50 lb/ft33 – 4 No etch Slight Medium
Figure 4. Wet or Dry Blasting Abrasive

10
Abrasive Fill Levels
Note: The DB350® has a maximum hold of:
•15 gal of clean water
•150 lb of abrasive (~40/70 mesh
size)
•21 oz of Rust Inhibitor
The blast pot does not require a maximum fill for operation. If the maximum fill is not needed for a job,
fill the machine according to estimated blast time. Use Figure 5 below for an approximate reference.
Water Abrasive Rust InhibitorBlast Time
DB225®10 gal 100 lb 14 oz~30 min
DB350®15 gal 150 lb 21 oz~45 min
DB500®20 gal 200 lb 28 oz~60 min
DB800®30 gal 300 lb 42 oz~90 min
DB1500®75 gal 750 lb 105 oz~2-3 hours
Figure 5. Abrasive fill levels

14
III. PREPARING TO BLAST
Personal Protective Equipment
DANGER: Failure to maintain proper PPE can result in the serious injury or death of
the operator or bystanders. Loud noise generated by blasting can cause hearing
damage. Everyone in the area must use proper hearing protection. It is the employer’s
responsibility to train employees to identify hazardous substances and to provide
suitable policies, procedures, monitoring, recordkeeping, and PPE.
The Occupational Safety and Health Administration (OSHA) recommends abrasive blasting
operators wear the following PPE while working:
•Hearing protection
•Eye and face protection
•Helmet
•Leather gloves that protect to full forearm and aprons (or coveralls)
•Safety shoes or boots
Additionally, operators and support personnel in the blasting area should wear proper respiratory
protection.
Respirators should:
•Cover the head, neck, and shoulders
•Be approved by the National Institute for Occupational Safety and Health (NIOSH)
DANGER: Breathing air must meet OSHA class D standards. Using a breathing air
source that does not meet class D standards can cause asphyxiation and death. Be sure
to use a high-temperature alarm and carbon monoxide monitor. Always make sure the
respirator hose is not connected to a line that supplies non-breathable gasses. Before
breathing air, be sure to test the content of the respirator line. Failure to follow these
procedures can result in serious injury or death to the user.
Masking and Containment
Masking
Cover or mask off items such as glass, chrome, rubber seals, wiring, electrical, or moving mechanical
parts that look delicate or should remain clean and dry. Tape is a good solution for covering small
pieces and parts.
Containment
Capture the blasting byproducts using a heavy tarp. Be sure to weigh down the corners of the tarp for
efficient containment.

15
DB350® Mobile XS Overview
DB350® Blast Pot
•3 ft3 capacity
•Holds 150 lb of abrasive per fill
•75” H x 27” W x 34” D
•Operating pressure of 30-150
PSI
•Texas Edition: internal parts are
manufactured of hardened steel
•Lifetime warranty
•Deck dimensions: 12’3" L x
2'6" W
•Total trailer dimensions:
13'6.24" L x 2'6" W
•DOT compliant LED lights
•One 3500 lb torsion axleaxle
•Torsion axle electric brakes
•Electric breakaway system
•Eight ply tires
•Estimated 3,270 lb dry
weight
Included Accessories
•100 ft blast hose and electric
line
•Redhead electric deadman
control
•Tungsten carbide nozzle (SLV
#4)
•Fill funnel with screen
•35 gal water tank
•48 GPM water pump
•Mini XS air drying and
cooling system
"XS" Trailer

16
Model DB350®
The figures below show commonly referenced parts of the DB350® blast pot mentioned in this manual.

17
IV. BLAST POT START UP
i. Connect the Blast Hose, Compressor Air Hose, and Lines to the Blast Pot
Attach the blast hose to the pinch hose
at the top of the blast pot and insert the
safety pins.
Caution:
When selecting the most productive
nozzle for the job, there are two
main points to consider. Check
what volume of air the compressor
in use can supply per minute
(CFM) and the desired nozzle
pressure (PSI) to maintain during
blasting. Be sure to choose the
appropriately sized nozzle for a
specific compressor and job to
avoid unnecessary damage to the
equipment or blasted surface.
Pneumatic blast pot. Fasten the twin line
to the control box
Connect the compressor air hose to the
compressed air inlet and insert the
safety pin.
Note: Be sure to connect the twin
line to the control box matching red
to red and green to green
Electric blast pot. Connect the electric line
of the red head controller to the control box
on the back of the blast pot.
Screw on the appropriate blast hose
nozzle. The nozzle size is based on the
air compressor size.
Safety pins

18
Close the air pilot valve to stop the flow of
water into the blast pot
Open the water tank valve.
ii. Fill the Blast Pot with Water
Note: The water storage tank on the mobile trailer must be filled before attempting to fill the blast pot.
Before travelling with a filled water storage tank, be sure to implement a safe counterweight to balance the
machine.
Figure 6. Valve is pictured in the open
position
Open the water inlet valve.
Open the overflow valve.
Close the compressor service valve, close
the air inlet-shutoff valve, and open the
blow down valve.
Caution:
Reference the instruction manual for the selected
compressor model before operating.
Allow the compressor to idle and warm up for
15-30 seconds once it is turned on.
Close the overflow valve when water stops
draining from the machine. Then close the water
inlet valve and the water tank valve.
Turn on the compressor.
Fill the blast pot with clean water until the
overflow valve starts to drain.
Note: If dry blasting, be sure to flip on the
cooling fan of the mobile unit. See page 25 for
more information on dry blasting start up.
Once the compressor has idled for 15-30
seconds, slowly open the compressor service
valve.
Activate water flow to the pot by opening the
air pilot valve.

19
DANGER: Do not use abrasives with more than one percent crystalline silica.
Breathing crystalline silica dust can cause silicosis, a potentially fatal and damaging
lung disease. Refer to the abrasive’s Safety Data Sheet (SDS) to identify potentially
toxic substances in the media. Always wear appropriate NIOSH-approved
respirators throughout the blasting process to help prevent potential serious injury
or death.
Place the fill funnel into the pot
opening.
Caution:
Use the provided media filter to
reduce the likelihood of clogging.
Debris in the system can damage the
machine.
Pour in a predetermined
amount of abrasive.
Remove the funnel and lock in
the fill cap.
Note: For detailed information on
choosing the appropriate abrasive type
for the job, see section II of this manual.
Note: If Rust Inhibitor® is needed, add it
to the blast pot at this time.
Remove the fill cap by pulling up on
the fill cap handle and turning the cap
iii. Fill the Blast Pot with Abrasive

20
Slowly open the air inlet-shutoff valve.
Caution:
Pressurize the blast pot before starting the active blasting process. When the machine pressurizes, the
abrasive lever on the blast pot will pop up. Adjust the operating pressure based on project goals. For more
information on tuning blast pressure, see subsection “Adjusting Operating Pressure” on page 24 of this
manual.
Open the air inlet-shutoff valve slowly to prevent damage to the machine from too much compressed air
flowing in at one time. The air inlet-shutoff valve and the blow down valve will be in opposite positions.
v. Pressurize the Blast Pot
Pull up on the abrasive lever to move the
handle into the unlocked position.
Close the blow down valve. To prevent build up of moisture, loosen the
screw at the bottom of the filter regulator
on the left of the control box and slightly
open the moisture trap valve.
Loosen screw
Note: Make sure the overflow valve and the water inlet valves are both closed before starting the procedure
below.