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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 inefficient. The best things is to find 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. 

Graffiti Removal

For removing graffiti from a brick wall, use about 100 PSI so you don't etch the brick. The graffiti 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

Summary of Contents for DB1500

Page 1: ...DB1500 DB3000 USER MANUAL...

Page 2: ...J INC 5711 Schurmier Rd Houston TX 77048 Support DustlessBlasting com Email 713 868 8041 Fax 1 713 869 2227 International Facebook com DustlessBlaster DustlessBlaster Youtube com MMLJManufacturing Dus...

Page 3: ...aintaining your Blast Pot 11 Troubleshooting 13 Containment Masking and Nozzle Control 14 Switching from Wet Blasting to Dry Blasting 14 Storing Machine 15 Choosing Your Blast Pressure 16 Choosing You...

Page 4: ...miento 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...

Page 5: ...ts 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 pa...

Page 6: ...pprox 50 70 100 oz of Rust Inhibitor INSTALLATION AND OPERATING INSTRUCTIONS PLEASE READ CAREFULLY BEFORE OPERATING MODEL DB1500 FIGURES 1 Pinch Hose 2 Control Box Input Couplings 3 Fill Port 4 Blowdo...

Page 7: ...clean water 1 5 gallons of Rust Inhibitor 1500 lbs of Abrasive mesh size approx 50 70 INSTALLATION AND OPERATING INSTRUCTIONS PLEASE READ CAREFULLY BEFORE OPERATING MODEL DB3000 FIGURES 1 Pinch Hose...

Page 8: ...3...

Page 9: ...4...

Page 10: ......

Page 11: ...HD 131126 001 1 19 Air Inlet Body ABHD 1 73478 001 1 20 Air Inlet Body Lug AB 47 131231 001 2 21 Air Inlet Body Lug Bolts 2 AB 47 B 23879 005 1 22 1 x 12 Nipple TOE DB 1500 FG 68 131400 001 1 22 1 x 2...

Page 12: ...1 1 57 Pinch Valve 74290 001 1 58 1 4 Close Nipple 77094 001 1 59 Brass Bushing DRC 3 B 73815 001 1 60 Button Bleeder BB 1S 69953 001 1 61 1 4 Tee RC 19 131865 001 1 62 Pinch Valve Safety Cover w scre...

Page 13: ...828 001 1 72 Dual Line Activator Valve Assembly DR 3 1 83619 001 1 72A Activator Valve Body DR 3 1A 83615 001 1 72B Activator Lever SDR 3B 83616 001 1 72C Hex Head Bolt SDR 3F 78963 001 1 72D Hex Head...

Page 14: ...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 find the b...

Page 15: ...lose 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 first the press...

Page 16: ...URE REGULATOR You should occasionally lubricate the threads on this knob with a lubricant such as lithium grease FILTER REGULATOR You will find the filter regulator on the left side of control box The...

Page 17: ...t 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 C...

Page 18: ...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 p...

Page 19: ...nozzles XL Performance Nozzle Increases abrasive particle velocity Allows for increased standoff distance while improving production and efficiency CLEANUP Depending the amount of media used plastic m...

Page 20: ...sket 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 precaution...

Page 21: ...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...

Page 22: ...ide 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...

Page 23: ...and heavier the abrasive is the rougher the profile will be Using larger more coarse abrasives will decrease the run time in your machine For example if you are blasting with 40 70 crushed glass and d...

Page 24: ...t stripping aggressive cleaning Medium Fast High Etch Moderate 40 65 HRC 260 lbs ft3 Organic soft media ideal for soft surfaces such as wood Slow No Etch No 4 4 5 40 lbs ft3 Angular organic grit for m...

Page 25: ...ustlessBlasting com For replacement parts and accessories visit store DustlessBlasting com For training resources visit support DustlessBlasting com To submit a ticket or to find safety data sheets bu...

Page 26: ...Toll Free 1 800 727 5707 International 1 713 869 2227 www DustlessBlasting com...

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