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The CO2 blasting system begins with liquid CO2 stored in a tank at 200-300 PSI which is then transported through a hose under its own pressure to a pelletizing machine (See illustration).
A rapid expansion of the liquid in the chamber converts the CO2 to a solid state of dry ice or snow. The snow is compressed and extruded through a disc die into small pellets. These pellets are then placed into the dry ice blasting equipment. The pellets are then transported through a hose to the blasting nozzle or gun. At the gun, the pellets are entrained into the high pressure air varying from 45-250 PSI by way of a venturi effect, and are propelled from the nozzle with a velocity of 75-3600 feet per second. Pellet velocity is a function of the air pressure selected for the application being performed.
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