Dust-free vacuum blasting

Besides a good blastpot, it is important that the suction unit has the correct capacity for the selected abrasive, the blasting pressure, and the distance from the unit where is going to be blasted. The filter of the suction unit must be capable of guaranteeing the correct long-term vacuum. Gritco units have all these professional features and also distinguish themselves by their ease of use and simple dust removal.

Dry compressed air is an absolute must for trouble-free blasting, especially because the abrasive is reused. This prevents blockages in the blast pot and guarantees a constant metered flow. Also, dry compressed air is important for proper operation and filter cleaning of the suction unit. An aftercooler, possibly extended with filters, gives this dry air.

Because the dust and abrasive are being contained in the brush head there is no direct risk for the operator. The operator generally wears hearing protection, safety goggles and gloves.

With vacuum blasting, the abrasive is being reused after the dust has been removed. Therefore reusable abrasive must be used for optimum performance. Depending on the application, this may be, for example, glass beads, aluminum oxide or steel grit. Because the abrasive is reused, it is important, the so-called upper grain (coarse grain) is regularly added in order to keep the correct operating mixture.

For the blasting itself, between 1.9 and 2.9 m³/min of compressed air is required (more info here). For machines with a pneumatic suction unit the air consumption of the suction unit must be added to this. Depending on the model this is 2.2 to 5.4 m³/min.