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Pressure Blast Machine-Airblast
Product Description:
A pressure blast machine, also know as blast pot, pressure blaster, and dry sandblasting machine, is a dry abrasive blasting system that holds abrasive in a pressurised vessel and feeds it, under compressed air, into the blast stream through an abrasive valve. Simple in construction and broad in application, it is the workhorse of industrial rust removal, paint stripping, deburring and surface preparation.
The impact of the abrasive strips mill scale, rust, weld spatter and old coatings in a single pass, and cuts a uniform surface profile at the same time. That profile is the anchor pattern the coating keys into, and it governs adhesion and the service life of the coating system. Because blasting is carried out in the open or inside a blast room rather than in a sealed cabinet, one unit serves hardware and fastener production, mould and die shops, structural steel fabrication, casting cleaning and stone finishing alike.
With steel grit in the G-12 to G-16 range (SAE J444) and a working pressure of 6 to 8 bar (87 to 116 psi), the machine will typically reach Sa 2½ (ISO 8501-1) or SSPC-SP10 / NACE No. 2 on the workpiece.
Model | DP400 | DP500 | DP600 | DP700 | DP800 | DP900 |
Overall Dimensions | 420*1150 | 520*1200 | 620*1350 | 720*1400 | 820*1530 | 920*1800 |
Diameter | 420 | 520 | 620 | 720 | 820 | 920 |
Wall Thickness | 5 | 5 | 6 | 6 | 6 | 8 |
Internal Volume | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.9 |
Air Compressor Requirement | 15kW | 15kW | 22kW | 22kW | 37kW | 37kW |
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Product Description
Application
Rust removal
paint and coating stripping
deburring
satin finishing and surface preparation before painting or powder coating — on hardware and fasteners
moulds and dies, cast iron and aluminium alloy castings, structural steel, plate and pipe, stone and glass
Core Features
Pressure feed rather than suction: higher abrasive velocity and cleaning rate on the same compressed air supply
Few moving parts — no turbine, no conveyor, minimal wear points
One unit handles any part that fits the blast area, whatever its size, shape or material
Pairs with a dust collector to hold dust emission within workplace limits
Consumables limited to abrasive and compressed air; wear parts are the blast nozzle and abrasive valve
Best suited to batch work and heavy surface preparation
Technical Specifications
Q: What is a pressure blast machine, and how does it differ from a blast cabinet?
A: A pressure blast machine holds abrasive in a pressurised vessel and feeds it into the blast stream under compressed air; the operator directs a hand-held nozzle at the workpiece. A blast cabinet is a sealed enclosure with a viewing window and glove ports, where the part is blasted inside the box. Jinwo builds the pressure type only. The open format suits large, heavy or awkward parts that will not pass through a cabinet door.
Q: How is pressure blasting different from suction blasting?
A: In a suction system, compressed air passing through the gun draws abrasive up from a hopper by vacuum. In a pressure system, the vessel is itself pressurised, so abrasive enters the airstream already under load. The practical difference is abrasive velocity at the nozzle: a pressure machine cleans faster on the same compressor, and the gap widens on heavy mill scale.
Q: What working pressure does the DP series run at?
A: 6 to 8 bar (87 to 116 psi) across all six models, which sits inside the output range of a standard site compressor. Machines above this range are outside our current production, so if your specification calls for more, we will say so at quotation rather than supply a unit that cannot hold it.
Q: What size air compressor do I need?
A: The requirement is 15 kW for the DP400 and DP500, 22 kW for the DP600 and DP700, and 37 kW for the DP800 and DP900. These figures assume continuous blasting at 6 to 8 bar. For intermittent work, a smaller compressor with a receiver tank will hold pressure between passes.
Q: What surface cleanliness can the machine achieve?
A: With steel grit in the G-12 to G-16 range (SAE J444) at 6 to 8 bar, results typically reach Sa 2½ to ISO 8501-1, equivalent to SSPC-SP10 / NACE No. 2. The grade actually obtained depends on abrasive grade, nozzle distance, dwell time and substrate condition, so we quote it as a working range rather than a guaranteed figure.
Q: Which abrasives can I use?
A: Steel grit and steel shot are the main media; garnet, glass bead and aluminium oxide also run well. Grit grades G-12 to G-16 cover most rust removal and profile work. Silica sand is restricted or banned in many markets on silicosis grounds, so we do not recommend it and supply steel grit as the default.
Q: Do I need a blast room and a dust collector?
A: Blasting with a pressure machine happens in the open or inside a blast room; it is not a sealed process. Pair the unit with a dust collector to hold emission within workplace limits, and work inside a blast room where the part is large or the site is enclosed. Extraction capacity should be matched to nozzle size and blast duration.
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