Table I: Nozzle Capacity and Performance

Why and Where to use Dry-ice Blasting
Nozzle type & size

Compressed air requirement

CT sec Why: Because it is currently the only environmentally friendly way to clean industrial surfaces without abrasion or the use of chemicals or solvents.

Because the list of chemicals and solvents that cannot be used or disposed of without costly restrictions will increase.

Because production machinery and planning methods will improve the just in time capabilities of manufacturing plant and on-line cleaning will be the only way to avoid costly cleaning stoppages.

Where: On practically all surfaces that can resist the forces applied by the impingement of the compressed air and the dry ice particles, as well as the sublimation force of the dry ice.

Where conventional cleaning causes unwanted changes to dimensions and surface finish.

Where conventional cleaning introduces unwanted moisture, chemical attack or is a safety hazard.
At 5.5 bar CT At 7.0 bar CT At 9.5 bar
m3/min sec m3/min sec m3/min
 
TV250 2.5 62 3.1 35 4.0 29
TV500 3.8 40 4.7 25 6.2 20
TV750 4.6 20 5.7 17 7.5 12
UV250 2.2 53 2.7 27 3.5 19
UV500 3.3 34 4.1 19 5.5 13
UV750 4.0 17 5.0 13 6.6 8

CT is the time taken to remove a 50 x 60 mm area of standard Polyester paint from a steel substrate. The cleaning times for the newly developed universal (UV) nozzle still have to be confirmed across the range but proving trials with the UV750 show faster times are achieved with less air, indicating an efficiency improvement of over 30% at 9.5 bar.

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