What Is an Abrasive Recovery Blasting Machine?
Abrasive recovery blasting combines pressure blasting with vacuum extraction, allowing abrasive and dust to be recovered directly at the blasting head.
This guide explains how recovery blasting works, where it is most useful, its advantages and limitations, and how it compares with conventional open blasting.
1. What is abrasive recovery blasting?
An abrasive recovery blasting machine combines a pressure blast pot with a vacuum recovery system.
Instead of allowing abrasive and dust to spread freely around the working area, the blasting head is held against the surface.
A surrounding brush or seal helps contain the abrasive while the extraction system simultaneously pulls used media, dust and removed contamination away from the surface.
Suitable abrasive can then be separated and reused.
This makes recovery blasting particularly useful where dust, mess and clean-up need to be kept under control.
Which abrasive does the Pressure Base use
The Pressure Base uses brown aluminium oxide Grade 40 only, matching the specified particle-size range.
Brown aluminium oxide — Grade and size: Grade 40, matching the specified grading of approximately 0.4–0.5 mm. Uses: Rust, paint and coating removal; localised preparation and profiling of compatible surfaces.
The abrasive is hard, angular and resistant to breakdown, allowing it to be recovered and reused under suitable conditions. Choose the pressure and technique for the substrate and the required finish.
Glass bead, garnet, crushed glass, calcium carbonate and vegetable media are not approved alternatives for this Pressure Base setup. Soda is also outside its specified abrasive range. Media suitable for a different recovery machine should not be assumed suitable for the Pressure Base.
Use the specified grade 40 rather than the finer 70-mesh brown aluminium oxide recommended for SABIX 8. Check the supplier's grading specification when choosing an equivalent product.
Where recovery blasting works best
The head works most effectively where its brush can maintain good contact. Typical applications include localised rust and coating removal on accessible steel panels, machinery housings, tanks, fabricated components and suitable weld areas.
On compatible stone slabs, the process can also be used for selected surface treatment or engraving. The hard abrasive and the intended surface effect must be acceptable: recovery contains debris but does not protect a delicate finish from abrasion.
Deep recesses, tight corners, narrow sections and heavily textured surfaces can interrupt contact and reduce recovery. A conventional open-blasting setup may offer easier access on these shapes. Large areas may also be more productive with a larger open-blast system and appropriate site controls.
Recovery blasting and dust control
Recovery blasting can substantially reduce abrasive spread and airborne dust compared with open blasting. Its effectiveness depends on the surface, brush condition, extraction performance, filter condition and operator technique.
It should not be described as completely dust-free. Maintain suitable containment, ventilation and operator protection for the material being removed. Assess hazardous coatings and dust before work begins; extraction alone does not make every coating suitable to blast.
Air electrical supply and pressure
The Pressure Base has a 24-litre pot, a standard 4 mm nozzle and a published operating pressure range of 2.5–7.8 bar. FEVI lists compressed-air consumption of 700–2,000 litres/minute at 7 bar, approximately 25–71 CFM, depending on configuration and operating conditions.
Confirm the demand for the exact setup before selecting a compressor. Use actual delivered airflow at working pressure, usually called Free Air Delivery or FAD, and allow for other air users. The lowest figure in the published range is not a complete-package compressor recommendation.
The extraction unit also requires 220–240 V single-phase power and is rated at 1,500 W. Its suction-airflow rating is separate from the compressor's compressed-air requirement.
Keeping the system working consistently
Keep the compressed air and abrasive dry to prevent clumping and uneven delivery. Inspect the recovery brush, nozzle, hoses, cyclone and filters, and clean or replace components according to the operating manual.
Monitor recovered media for contamination and excessive breakdown. Do not transfer abrasive used on one material to a contamination-sensitive job without checking suitability and cleaning the circuit.
The Pressure Base can be supplied with an optional conversion kit for open blasting. Confirm the correct configuration and any media requirements with CoolBlast before changing how the machine is used.
Final Thoughts
Recovery blasting collects abrasive and debris at the working head, reducing their spread and subsequent clean-up.
The Pressure Base is most useful for localised work where the recovery brush can maintain good contact with the surface.
Use brown aluminium oxide Grade 40 only, matching the specified grading of approximately 0.4–0.5 mm. Other media used in SABIX machines are not substitutes.
Match the compressor to the exact configuration and provide the separate electrical supply for extraction.
Keep air and abrasive dry, maintain the recovery circuit and check reused media for contamination and breakdown.
Recovery reduces dust and abrasive spread, but does not guarantee dust-free work or protect a delicate surface from abrasion.
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