At this point the abrasive and substrate coating break down into four constituents; i.e. good abrasive, spent abrasive, large contaminants and dust. Good abrasive, spent abrasive and any large contaminants fall to the
recovery floor. Airborne dust particles are carried on the flow of air through the room generated by the dust collector.
The constituents now in the floor are conveyed to the elevator and in turn the Dynamic Separator. This unit comprises of a primary vibrator sieve and air wash. In this section any remaining dust is taken to the dust collector, spent abrasive and large contaminants to a collection bin. This method of separating spent abrasive, in a way that they are not taken to the dust collector, means that the collector elements are prevented from suffering premature wear. The operator, by adjusting the power of the vacuum placed
on the abrasive, decides what minimum size of particle he wishes to remain in the system; i.e. the higher the vacuum the larger the particle taken out of the abrasive.
Beginning at the blast machine the pressure and abrasive content is set to the required limits. Once the operator has closed the dead-mans handle, abrasive is propelled under pressure through a high quality 12 bar blast hose of 1.25” bore and in-turn the blast nozzle. This is only possible provided all safety
interlocks are closed on doors, etc.
Clean abrasive is now all that remains and is deposited in a silo equal in capacity to the volume of the blast machine or machines. Once all the abrasive in the blast machine has been delivered (or at any other time the operator releases the dead-mans handle), the blast machine is automatically charged with fresh abrasive from the silo above.