Problast Dustfree Blast Machines
Problast® closed-circuit blast machines
Problast® closed-circuit blast machines, also known as dust-free blast machines or vacuum blast machines, have a closed blast media circuit, i.e. the blast media is extracted and reprocessed immediately after it hits the workpiece.
The abrasive quality is maintained and abrasive consumption is significantly reduced. In this way, blasting can be carried out at any location without interfering with other activities nearby with dirt and dust.
Dust-free blasting with Problast® recovery blast gun
The Problast® recovery blast gun seals against the surface to be processed and thus enables the simultaneous blasting and suctioning of abrasive and dust. The necessary conveying air is sucked in by a circular brush.
Application examples
Problast® closed-circuit blast machines are ideally suited for the treatment of flat and rotationally symmetric workpieces. Typical applications are the blasting of rollers and plates or the cleaning of welds.
Problast®
Pressure-Fed Machines
In the pressure-fed version blast media stored in the pressure vessel is metered into the air stream and directed with up to supersonic velocity at the workpiece through a specially designed nozzle. Pressure-fed blast machines are mainly used for
- Rust removal
- Descaling
- Cleaning
- Paint stripping
- Roughening
- Shot Peening
For pressure-fed blasting mainly metallic media and aluminium oxide are used.
Continuous Blasting (K-version)
Special applications sometimes require uninterrupted blasting operation for several hours*. In the case of pressure blasting this means that no break is available for the refilling of the pressure vessel. This is rather achieved by a transfer vessel which feeds the main pressure vessel. Whereas the abrasive residing in the main vessel always remains under pressure, the transfer vessel is operating in continuous cycling mode: depressurization – refilling from the storage hopper – pressurization – refilling of the main pressure vessel.
*) An optionally available external refilling hopper ensures a constant operating mixture by feeding fresh abrasive into the vacuum hose.
Problast®
Suction-Fed Machines
In the suction-fed version the blast media is drawn to the nozzle by a venturi generated within a special gun assembly. Suction-fed blast machines are mainly used for
- Mattening
- Roughening
- Cleaning
For suction-fed blasting mainly non-metallic media such as glass beads and aluminium oxide are used.
Problast® Powerpacks
Problast® Powerpacks are used both for retrofitting existing and for equipping new blasting systems. These are usually special systems or blastrooms with a retrofitted extraction floor (multihopper). The configuration of the Powerpacks is designed exactly according to the requirements of the respective application.
Which type of blast media?
Our blasting systems are suitable for all blast media that can be reused.
