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Dual Blaster Instructions

Soda/Abrasive Blasting with Part #11737

Eastwood's Master Blaster- Dual Blaster

Eastwood's Dual Blaster allows you to strip, clean and blast with our Patent Pending, specially designed "mixing valve" to instantly switch from Soda Media to Abrasive and back again in seconds.

The Soda Blasting side of the equipment is color coded GREEN and the Abrasive Blasting side is color coded RED. DO NOT attempt to put Soda Media in the RED side or Abrasive Media in the GREEN side. Damage to the equipment and operator injury can occur. Note: If this should occur, stop work immediately, disconnect from air supply, release all pressure and drain tank by removing cap and inverting unit. Replace cap, repressurize unit and purge all remaining media from valves and hose.



WARNING: Pressure blasters and blast cabinets emit abrasive particles under high pressure. Adequate respiratory, eye, and body protection must be utilized at all times during product operation. Inhalation of silica based blast media particles have been known to cause cancer and other deadly diseases and must be avoided. Always wear NIOSH approved respiratory protection when operating this equipment.

  • - Do not use any sand or silica based abrasives with this blaster. Silica based abrasives have been linked to severe respiratory disease.

  • - Read the manual carefully before beginning. Learn the blaster’s applications and limitations as well as potential hazards.

  • - All children should and pets should be kept away from the work area. Never let a child operate the abrasive blaster.

  • - Do not operate this tool if under the influence of alcohol or drugs. Read warning labels on prescriptions to determine if your judgment or reflexes are impaired while taking drugs. If there is any doubt, do not attempt to operate.

  • - Use safety equipment. Eye protection should be worn at all times when operating this tool. Use ANSI approved safety glasses. Everyday eyeglasses are NOT safety glasses. NIOSH approved respiratory protection, non-skid safety shoes, blast hood, hard hat, and hearing protection should be used in appropriate conditions.

  • - Always disconnect the air supply and release pressure from the tank before refilling media, storing, servicing, or changing accessories. Such preventative safety measures reduce the risk of releasing pressure accidentally.

  • - Use clamps or other practical means to secure and support the work piece to a stable platform. Holding the work by hand or against your body may lead to a loss of control and result in severe injury.

  • - Check for damage regularly. If any part of the tool is damaged it should be carefully inspected to make sure that it can perform its intended function correctly. If in doubt, the part should be repaired. Refer all servicing to a qualified technician. Consult Eastwood for advice.

  • - Always check to make sure that the dead man valve is not open before connecting blaster to air supply. Blaster may cause damage to property or person if connected to air while the dead man valve is open.

  • - Drain water trap periodically during use. Do not allow moisture to fill more than 1/2 the water trap bowl. Do not leave water standing in water trap when done with work.

  • - Do not allow abrasive blaster to sit pressurized while unattended or not in use.

  • - Make sure all equipment is rated to the appropriate capacity. For best results, set regulator and operate at 80 to 90 PSI. DO NOT exceed 125 PSI.

  • - Periodically check the abrasive media delivery equipment. Valves, hoses and nozzles that carry the abrasive media after it leaves the pressure tank are subjected to the abrasive blasting action so they will wear out more quickly than other components.

  • - Release the air pressure in the tank before opening. See "Releasing Pressure from the Tank" section. Make sure pressure gauge reads "0" before opening the tank. Do not attempt any maintenance on the abrasive blaster until the pressure gauge reads "0", and it has been disconnected from air supply.

  • - Maintain correct air pressure when working. DO NOT allow pressure to exceed 125 psi. The safety valve is set to release at 125 PSI. If the safety valve releases, stop all work immediately and release pressure from the tank (see "Releasing Pressure from the Tank" section).


  1. 1. Remove Dual-Tank Assembly from container and place on a soft work surface for assembly.
  2. 2. Place tubular sides of the Upper Loop Frame over the swaged ends of the Lower Frame and Axle Assembly. Attach to the 4 outward curved mounting tank mounting tabs with 2 supplied 1/4” long Phillips head screws and nuts.
  3. 3. Place 2 wheels with offset hubs inward onto axle ends with washers on outboard ends. Push Cotter Pins through holes in axle and bend split ends around axle.
  4. 4. Slide the Front Support Loop over the leg stubs welded to the front of the tanks. Place a cotter pin in each hole and fold split ends over.
  5. 5. Attach Inlet Manifold to the tab on the crossmember of the Frame Assembly with 4 included 1/2" long socket head cap screws.
  6. 6. Using Teflon Tape, thread the Pressure Gauge into the open port on the top of the Inlet Manifold and tighten.
    CAUTION: these are tapered pipe threads and over tightening will cause permanent damage.
  7. 7. Using Teflon Tape, thread the Moisture Trap and Inlet Valve into the rear facing port of the Inlet Manifold and tighten. Caution: these are tapered pipe threads and over tightening will cause permanent damage.
    IMPORTANT NOTE: The Eastwood Dual Blaster combines two separate blasting systems using one Discharge Nozzle. The Soda System is identified with GREEN valves while the Abrasive System is identified with RED valves. When viewed from the back (wheel side) the RED (Abrasive) is on the LEFT and the GREEN (Soda) is on the RIGHT. When making hose connections, it is vitally important to keep the systems as designated.
  8. 8. Using Teflon Tape, thread the female fitting of the right (SODA) pressure hose into the right front male fitting on the Inlet Manifold and tighten.
    CAUTION: these are tapered pipe threads and over tightening will cause permanent damage.
  9. 9. Repeat previous step for the left (ABRASIVE) pressure hose.
  10. 10. Flip the unit gently on its back with the Frame Loop and wheels supporting the weight providing access to the manifold assemblies on the underside of the tank.
  11. 11. Attach the right side SODA blast hose (GREEN VALVE) to the barbed fitting and securely tighten the hose clamp. Note: Be certain that the GREEN VALVE at the tank end corresponds to the GREEN VALVE at the Discharge Nozzle end.
  12. 12. Repeat previous step for the left (ABRASIVE) blast hose.
  13. 13. Using Teflon Tape, thread the Blast Discharge Nozzle to the 2-in-1 Manifold.
    CAUTION: these are tapered pipe threads and over tightening will cause permanent damage.


Before beginning any blasting, the separate Soda Blasting and Abrasive Blasting systems must be individually adjusted for optimal flow. Failure to do so will result in inefficient operation and wasted media. This manual is divided into two sections, Blasting With Soda and Blasting with Abrasive Media. Please follow the individual following procedures for Soda Blasting (GREEN SIDE) and Abrasive Blasting (RED SIDE).

SODA BLASTING (Green Valves)

Although the Bicarbonate of Soda (Baking Soda) blasting media itself is safe in most situations, appropriate care should be taken when using or disposing as some removed paints and coatings may contain some levels of hazardous materials such as lead, zinc chromate, etc. Additional protection may be required in the presence of these substances. Soda Blasting Media is highly susceptible to moisture absorption which will cause clumping and erratic operation. To insure proper function, it is imperative to have an effective moisture filter and or desiccant system in the air supply immediately before the Air Inlet. Be sure to drain any moisture captured in the moisture filter before and after each use. Failure to do so may cause “caking” of media and complete blockage of equipment.


  1. 1. Carefully fill the unit per Blaster Instructions using a screen sifter and funnel. Note: a suitable screen sifter such as Eastwood #50417 Sifter/Funnel must be used to capture any clumps present in the bag of media.
  2. 2. Close all four valves and connect the air supply.
    DO NOT EXCEED 125 PSI. For best results, begin with a blaster inlet pressure of 80 to 90 PSI.
    To avoid media clumping or caking, be certain to have a clean, moisture free air supply that includes an effective moisture filter or desiccant system.
  3. 3. Open the Inlet Air Supply Valve slowly and carefully while checking for leakage.
  4. 4. Slowly open the Throttling Valve (Fig. 1) to the 1/2 position while checking for leakage.
    Note: This valve will require fine tuning to provide optimal media flow based on media formulation, air pressure and desired volume.
  5. 5. Slowly open the Media Flow Valve (Fig. 2) to the full position while checking for leakage.
  6. 6. You may now direct the nozzle toward your work and depress the Nozzle Discharge Lever.
    Note: Some slow, pulsing discharges of media can be expected until the flow begins.
  7. 7. Once a steady flow of media is observed, begin by holding the nozzle 6" to 12" from the work surface at a 30°-45° angle for best results.
  8. 8. Hold the stream against the work until it abrades through the coating revealing an edge.
  9. 9. Use the stream as a "wedge" working at the edge to quickly remove the coating.
  10. 10. At this point you can vary the position of the Throttling Valve (Fig. 1) from the initial 1/2 open starting setting to achieve an optimum air/media ratio. Note: As there are many variables affecting the flow such as media formulation, hardness of coating, air volume, air pressure and atmospheric conditions, this process requires a bit of "trial and error" by experimenting with distance, angle and throttle position. You will quickly become proficient at determining the ideal settings.
  11. 11. When refilling the tank becomes necessary, first shut off the Inlet Air Supply Valve, The Throttling Valve and The Flow Valve. For safety, disconnect the air supply. Next, open the Purge Valve to release all tank pressure. You may then open the Tank Filler Cap and refill following the procedure in step 1.
  12. 12. All unused media MUST be drained from the tank when completing work as any moisture present in the tank will drain to the bottom of the tank and can create a solid "cake" with the media, requiring complete disassembly of the apparatus at the bottom of the tank.
    Note: Failure to properly seal or over tightening fittings can lead to component failure which could result in sudden air pressure release and cause serious injury.
  13. 13. To drain unused media from the tank, place the open end of The Clear Purge Hose into a suitable container such as a large bucket or sturdy box with closed seams and cover with a blanket. Using extreme care, slowly open the Purge Valve and direct the stream of media into the container.


  1. - The most common problem encountered with Soda Blasting is clumping of media due to moisture contamination. If media stops flowing, stop all work and "burp" (quickly open and close) the Purge Valve allowing a minimal discharge of media from the Clear Purge Hose. Be certain to direct the discharge to a safe area. Placement of the hose in a cardboard box covered with a blanket is strongly recommended.
  2. - If a purge fails to restore flow, stop all work and close the Throttle Valve fully. You can then depress the Nozzle Discharge Lever several times which will discharge a quantity of media under tank pressure clearing the clumping.
  3. - It is strongly advisable to drain all unused media when completing work as any moisture present in the tank will drain to the bottom of the tank and can create a solid "cake" with the media. Should this occur, it will require complete disassembly of the apparatus at the bottom of the tank for cleaning.
  4. - If results become erratic or undesirable, remember that there are many variables affecting the flow such as media formulation, hardness of coating, air volume, air pressure and atmospheric conditions, this process requires a bit of "trial and error" by experimenting with distance, angle and throttle position. By adjusting Throttle Valve position (Fig. 1) between 1/2 and full open and varying the distance of the nozzle to work surface along with the angle, optimal performance can quickly be restored. Refer to steps 8 through 11 in the Operation section for the procedure.


  1. - Soda Blasting generates a considerable amount of fine bicarbonate of soda dust. If working outdoors, be aware of wind direction, open windows, vegetation, vehicles, pets, people and property. It may be helpful to place a fine mist, garden hose lawn sprinkler downwind of the blasting site to suppress dust generation.
  2. - It is best to cover the work area under and surrounding the vehicle or object to be stripped with a 3 mil or thicker plastic sheet material to assist in cleanup. You may also wish to tape up window seals and other areas to keep unwanted dust out of a vehicle.
  3. - Bicarbonate of Soda itself is virtually harmless to the environment however, in higher concentrations; it may cause browning of vegetation. Care should be taken to avoid depositing excess soda on plant life.
  4. - When finished, the plastic sheeting with the used soda media can be rolled up and disposed of, reducing sweep up time. The remainder should be swept up and disposed of. Any remaining soda residue is water soluble and can be hosed away. Important Note: Although the Bicarbonate of Soda blasting media itself is safe in most situations, appropriate care should be taken when using or disposing as any removed paint or coating can contain some levels of hazardous materials such as lead, zinc chromate, etc.


  • - Soda Blasting leaves behind a thin protective film which, if left untouched, will prevent surface rust from forming on bare steel surfaces for up 6 weeks or even longer if stored in a dry, protected area. This film must be removed before painting by wiping down with water dampened Microfiber cloths or suitable lint-free towels. It is best to soak the cloth, wring out excess water, wipe off soda residue, rinse often and immediately follow up with a dry lint-free towel.
  • - Any soda media left in body seems or crevices can be removed with a small shop vacuum and a fine tipped blow gun. Be sure to wipe surrounding areas as described above.
  • - To prevent flash rust or oxidation from appearing on metal surfaces after water wipe down but before painting, treat surfaces with Eastwood Fast-Etch™ #19416Z.


NOTICE: This data is approximate and is presented for comparison use. Due to the many variables such as; compressor capacity, air line size, grade and grit size of media used, coating thickness and hardness, individual results will vary.

Nozzle SizeCFM @ 80 PSIApproximate Media UsageArea
2mm625 lbs/hr135 sq. in./hr
2.5mm1235 lbs/hr180 sq. in./hr
3mm2060 lbs/hr250 sq. in./hr
3.5mm2575 lbs/hr75 lbs/hr


WARNING: Always wear your blast hood, NIOSH approved respiratory protection, ANSI-approved safety glasses and heavy duty canvas gloves when operating the abrasive blaster.

WARNING: Before operating your abrasive blaster, inspect each connection, double checking to make sure that all are tight and properly sealed.


Loading Abrasive

  1. 1. Before opening tank, be sure that it is not pressurized and the air gauge reads "0".
  2. 2. To release the pressure from the Tank, press Blast Discharge Nozzle until air stops.
  3. 3. Check to make sure the abrasive is dry and clean so that it does not clog the unit.
  4. 4. Close the brass Air Supply Valve by turning it to the vertical position.
  5. 5. Remove the Filler Cap.
  6. 6. Using the Funnel, pour the selected abrasive media into the tank. Do not fill the tank more than 3/4 full. If humidity in your region is 90% or more, only fill the tank half full and check the water trap more frequently.
  7. 7. Close the Filler Cap securely, assuring o-ring is in place.

NOTICE: To avoid damage, it is advisable to have your compressor located in another room away from damaging debris.

Start Abrasive Blasting

NOTICE: Start with all valves in the closed position. Following the instructions below will help prevent the formation of clogs in the abrasive hose, outlet manifold and the Blast Discharge Nozzle.

  1. 1. Connect air compressor to the Inlet Connector.
  2. 2. Open Air Supply Valve.
  3. 3. Open Throttling Valve.
  4. 4. Check for leaks at the Filler Cap and along all hoses and fittings as the system pressurizes. If leaks are observed, release the pressure from the tank and repair immediately.
  5. 5. Point Blast Discharge Nozzle in a safe direction away from people, pets or anything around you that may be harmed by direct or indirect abrasive spray.
  6. 6. Press and hold Blast Discharge Nozzle until air is flowing through the nozzle.
  7. 7. With the Blast Discharge Nozzle open, slowly open the Abrasive Control Valve until abrasive material begins to flow out of the Blast Discharge Nozzle.
  8. 8. Abrasive Flow Adjustment as follows: Note: The Abrasive Flow is a finely tuned combination of two adjustments which can vary with different media and atmospheric conditions.
    • Adjust air pressure with the Throttling Valve. The Throttling Valve controls the velocity of material flow.
    • 10. Adjust abrasive flow with Abrasive Control Valve. The Abrasive Control Valve controls the amount of abrasive in the stream.
    • 11. Watch for abrasive clogging. Release pressure from the tank if necessary and replace the abrasive with drier or cleaner abrasive.
  9. 12. Begin blasting.

To Stop Blasting

  1. 1. While continuing to press and hold the Blast Discharge Nozzle, turn the Abrasive Control Valve to the closed position (this is to prevent any clogging.)
  2. 2. When you notice only air (no abrasive) is coming out of the Blast Discharge Nozzle, you can stop the air flow by releasing the trigger. This ensures a clean and clog-free manifold, hose, and safety trigger.

Releasing Pressure From The Tank

  1. 1. When you are finished blasting, point Blast Discharge Nozzle in a safe direction away from people, pets or anything around you that may be harmed by direct or indirect abrasive spray.
  2. 2. Press and hold the Blast Discharge Nozzle to expel any remaining abrasive material from the Abrasive Hose.
  3. 3. Close the Abrasive Control Valve.
  4. 4. Release pressure on the Blast Discharge Nozzle.
  5. 5. Close the Throttling Valve and the Air Supply Valve.
  6. 6. Disconnect air supply hose from abrasive blaster.
  7. 7. Press the Blast Discharge Nozzle until air stops flowing and Pressure Gauge reads "0".

CAUTION Pay particular attention to the Abrasive Hose, the Abrasive Control Valve, and the Nozzles as they will wear out much more quickly than the other pieces. The Abrasive Hose needs to be replaced immediately if its side walls develop leaks or show blisters in the surface. Do not use if any of these problems are present.


The kind of abrasive you choose will greatly influence the amount of time needed to clean a given surface area. Abrasive materials include glass beads, aluminum oxide, and others. For best results, use 80 grit abrasive or finer. Do not exceed 80 grit media size.

  • - Make sure that the abrasive you use is thoroughly dry. Damp abrasive can cause clogging of your abrasive blaster.
  • - While you may reuse abrasive, remember that abrasive does wear out. After use, abrasive becomes smoother and rounder, thus reducing abrasive effectiveness.
  • - Reusing abrasive may also cause clogging due to debris contained in the mixture from prior use.


  1. 1. Release Blast Discharge Nozzle shutting off the media flow.
  2. 2. Close Soda Valve (Green) and open Abrasive Media (Red) to switch from Soda to Abrasive.
  3. 3. Depress Safety Trigger allowing flow although the opposite media will continue to flow until the hose has cleared.


  1. - Keep your Eastwood Dual Blaster clean, and protect it from damage.
  2. - Release pressure from the tank after each use.
  3. - When initially pressurizing, check for leaks at the tank top and at all hoses and fittings. Leaking joints may be repaired by replacing worn or damaged parts and using teflon tape at joints.
  4. - Check for worn abrasive hose and fittings. The Abrasive Control Valve, manifold, and all parts after the abrasive is ejected from the tank are subject to rapid wear due to the flow of abrasive. Watch especially for leaks, blistering, bulging or thinness of the hose. Replace any parts which appear worn.


Tank Volume .................10 gallons / 100 lbs. abrasive or 75 lbs. of soda media.
Hose Length ................8 ft. x 1/2" i.d.
Working Pressure ........60-125 psi
Air Consumption .........6-25 cfm


Hose ID Hose L Nozzle ID Approx. Compressor HP CFM@125 psi Abrasive Use/Hr
3/8" 50' 2 2 6 30 lbs.
3/8" 25' 2.5 4 12 80 lbs.
1/2" 50' 3 7 20 120 lbs.
1-1/2" 15' 3.5 10 25 150 lbs.