1. Manuals
  2. Brands
  3. DUSTLESS BLASTING Manuals
  4. Industrial Equipment
  5. DB350 Mobile XS
  6. User manual

DUSTLESS BLASTING DB350 Mobile XS User Manual

Hide thumbs Also See for DB350 Mobile XS:
Table of Contents

Advertisement

Quick Links

Download this 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.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DB350 Mobile XS and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for DUSTLESS BLASTING DB350 Mobile XS

Summary of Contents for DUSTLESS BLASTING DB350 Mobile XS

  • Page 1 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.

  • Page 2: Table Of Contents

    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.
  • Page 3 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.
  • Page 4 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...

  • Page 5: Introduction

    I. INTRODUCTION ® 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.

  • Page 6: Warranties

    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.
  • Page 7 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...

  • Page 8: Safety Overview

    Safety Overview Blast pot ASME blast pot Remote controls Personal Protective Equipment (PPE) Blast hose Abrasive. Media must be suitable for blasting and Remote controls. Never attempt to bypass the the conditions the operator chooses to blast in i.e. wet remote (safety) controls on the blast pot setup.

  • Page 9: Mobile Safety Overview

    Mobile Safety Overview Remote controls. Never attempt to bypass the Abrasive. Media must be suitable for blasting and remote (safety) controls on the blast pot mobile setup. the conditions the operator chooses to blast in i.e. wet A few important safety points to ensure are in proper or dry blasting.

  • Page 10: Abrasives

    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.

  • Page 11: Media Comparison Charts

    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/ft is less dense than a sample of 145 lb/ft .
  • Page 12 Figure 4. Wet or Dry Blasting Abrasive Bulk Surface Surface Description Hardness Velocity Density Profile Removal Angular for fast 40 – 65 Medium Steel Grit stripping and aggressive 260 lb/ft High etch Moderate fast cleaning Spheres designed for 40 – 51 Steel Shot 230 lb/ft No etch...

  • Page 13: Abrasive Fill Levels

    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.

  • Page 14: Preparing To Blast

    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.
  • Page 15 ® Mobile XS Overview DB350 ® "XS" Trailer Included Accessories DB350 Blast Pot Deck dimensions: 12’3" L x 3 ft 100 ft blast hose and electric capacity • • • 2'6" W line Holds 150 lb of abrasive per fill •...

  • Page 16: Model Db350

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

  • Page 17: Blast Pot Start Up

    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 Pneumatic blast pot. Fasten the twin line at the top of the blast pot and insert the to the control box safety pins.

  • Page 18: Fill The Blast Pot With Water

    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.

  • Page 19: Fill The Blast Pot With Abrasive

    iii. Fill the Blast Pot with Abrasive 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.

  • Page 20: Pressurize The Blast Pot

    v. Pressurize the Blast Pot 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”...

  • Page 21: Active Blasting

    V. ACTIVE BLASTING Danger: Uncontrolled blast stream and high-velocity abrasive particles can inflict serious injury. Always maintain nozzle control and point the blast nozzle in the direction of the blast surface only. Make sure the blast hose is securely fastened to prevent detaching during operation.

  • Page 22: Blast Pot Shut Down

    VI. BLAST POT SHUT DOWN Caution: DO NOT turn off the compressor when starting the shut down process. Failure to leave the compressor running will cause a backflow of air, water, and media into the system and damage the machine. While the compressor is running, close the Close the compressor service valve.

  • Page 23: In Process Adjustments

    VII. IN PROCESS ADJUSTMENTS There are three recommended areas of adjustment to aid in an efficient blasting process. Abrasive flow rate • Blasting pressure • Stand-off distance • Adjusting Abrasive Flow Rate The desired flow rate of media from the blast pot may change from surface to surface. There are adjustments that can be made throughout the blasting process to maximize media flow rate.

  • Page 24: Decreasing Media Flow

    Decreasing media flow Fully depressurize the blast pot before decreasing media flow. Decrease the amount of abrasive in the blasting output by turning the abrasive valve in quarter-turn, clockwise increments. Note: Adjust the blast nozzle so the media stream is hitting the surface at a 45-degree angle for a more efficient technique.

  • Page 25: Transitioning From Wet To Dry Blasting

    VIII. TRANSITIONING FROM WET TO DRY BLASTING DANGER: Failure to maintain proper PPE when blasting 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.

  • Page 26: Machine Storage

    IX. MACHINE STORAGE When leaving a blast pot idle for long periods of time, be sure to completely blast the water and media out of the tank or follow the storage procedure below. See Figure 9 and 10 in “Flushing the Blast Pot”...

  • Page 27: Transportation

    X. TRANSPORTATION Machine Transportation DANGER: Make sure the blast pot is empty and the abrasive control lever is locked before attempting to transport the machine. Use lift equipment that is suitable for weight heavier than the machine and attachments. Securely attach the machine to transportation device such as a pallet or vehicle.

  • Page 28: Trailer Transportation And Safety

    Trailer Transportation and Safety DANGER: For the protection of the operator, bystanders, and equipment, follow the safety procedure checklist below before attempting to transport the mobile unit. Use caution when connecting or disconnecting the trailer. Always securely fasten the machine to the transportation vehicle. The following recommendations should not be considered comprehensive to all possible conditions.

  • Page 29: Moving The Blast Pot From The Trailer

    Moving the Blast Pot from the Trailer DANGER: Be sure to read and understand all safety notices in this manual before operation and transportation of any machine accessories. Always use lift equipment that is rater higher than the weight of the machine and accessories. Do not move the machine on an incline or slippery surfaces.

  • Page 30: Maintenance

    XI. MAINTENANCE DANGER: Do not attempt maintenance on a pressurized machine. Control Box Pressure regulator The control box’s pressure regulator comes factory set at 80 PSI. Make sure to adjust the regulator until the PSI is back at 80 if the pressure is ever changed. Caution: Do not attempt to change the PSI of the control box’s pressure regulator from 80 PSI.

  • Page 31: Blast Pot Pressure Regulator

    Blast Pot Pressure Regulator Be sure to periodically lubricate the threads on the pressure regulator knob with a lubricant such as lithium grease. Filter Regulator The filtered moisture and debris will collect at the bottom of the regulator if not vented through the screw.

  • Page 32: General Blast Pot Maintenance

    General Blast Pot Maintenance Flushing the Blast Pot Regularly flushing the pot avoids potentially damaging buildup from accumulating on the walls of the machine. About once a month, follow the procedure below to properly flush the blast pot. 1. Fully depressurize machine by opening the air inlet-shutoff valve and closing the blow down valve.

  • Page 33: Blasting Wear Parts

    Blasting Wear Parts Certain parts wear faster than others and will require regular maintenance and inspection depending on the method and abrasive used to blast. These items should be inspected for damage or wear weekly. Note: Depending on how much dry blasting is done, these parts may have to be replaced sooner or later than the recommended time.

  • Page 34: Pinch Hose Maintenance

    Pinch Hose Maintenance Warning: Make sure to completely replace the pinch hose after about 40 hours of use or four rotations. When replacing the hose, make sure there is a flush square cut. Failure to do so could result in pinch hose malfunctioning. A dysfunctional pinch hose can result in operator or bystander injury.

  • Page 35: Removing The Brass Couplings From An Old Hose

    Removing the Brass Couplings From an Old Hose 1. Remove the screw on the coupling using a Phillips head screwdriver or drill. 2. Unscrew the brass coupling from hose turning counterclockwise. A bar or rod may be needed to loosen this piece. Attaching the Brass Couplings to the New Pinch Hose 1.

  • Page 36: Preventative Maintenance

    Preventative Maintenance The following daily, weekly, and monthly maintenance suggestions should be used as a minimum guide only. Comprehensive maintenance will vary based on model. Consult the compressor and engine user manuals for detailed manufacturer recommendation guidelines. The following compressor maintenance is based from recommendations for a Chicago Pneumatic (CP) model. Daily Maintenance The operator should perform daily checks on all parts of their machine to ensure safety and operational ability of components.

  • Page 37: Weekly Maintenance

    Trailer Inspect the tires and axles for damage or wear • Walk around the trailer daily to ensure equipment is in operational condition. • Weekly Maintenance General parameters for checking the items below is about every ten hours. MMLJ Parts Rotate the pinch hose.

  • Page 38: Monthly Maintenance

    Monthly Maintenance General parameters for checking the items below is about every 40 hours. MMLJ Parts Replace the pinch hose monthly, or after it has been rotated four times. • Lubricate the threads of the pressure regulator knob with a lubricant such as lithium •...
  • Page 39 XII. TROUBLESHOOTING Media Buildup Inside the Blast Pot Adjust the vibrator valve On the left side of the control box, a small brass petcock valve controls the vibrator speed. Make sure this vibrator valve is open during active blasting and adjusted until there is maximum vibration of the machine head.
  • Page 40 Pinch Valve is Not Opening or Closing (Pneumatic) Caution: Open the blow down valve and close the air inlet-shutoff valve before beginning the process below. Check the following Does the pressure gauge on the Are all fittings tightly secured to Is air bleeding out of the bottom left side of the control the deadman and the back of the...
  • Page 41 The Future of Surface Preparation ® MMLJ, Inc. Phone: 800-727-5707 Email: support@dustlessblasting.com 5711 Schurmier Rd. International: +1 713-869-2227 www.dustlessblasting.com Houston, TX 77048 Fax: 713-868-8041...

Table of Contents