7
CLEANING EFFECT
The cleaning effect of dry ice blasting is based on three principles:
• Thermal Effect:
The dry ice pellets have a temperature of -79°C/-110°F, and impurities are
therefore cooled down drastically; the impurities shrink and loosen due to different
thermal expansion coefcients.
• Kinetic Effect:
When the dry ice pellets leave the blasting gun nozzle they have high kinetic
energy and strike the impurities at a speed almost equivalent to the velocity of
sound.
• Sublimation Effect / Volume Expansion:
The dry ice pellets are being pressed into the brittle impurities and sublimate
immediately on contact. The resulting volume increase by a factor of approx. 700
contributes to tearing away the contaminant.
SAFETY REGULATIONS
GENERAL
This manual contains instructions and safety regulations which must be followed
while starting, operating and maintaining the dry ice blasting machine. It is
important that the manual is kept, so the operator always knows its exact location.
It is also important the owner makes certain that the operator reads, understands
and follows the contents of the manual.
PERSONNEL QUALIFICATIONS
Personnel responsible for operation, servicing and maintenance must be suitably
qualied to perform these functions. Special training in machine handling as well
as in repair and maintenance is offered by the manufacturer of the machine.
The owner of the machine must ensure that the person appointed to operate
the dry ice blasting machine fully understands and is able to follow the SAFETY
REGULATIONS dened in the following pages, and the WARNING SYMBOLS located
on the machine.
SAFETY AND RISK
The machine is constructed to comply with the standards and clauses contained
in the Declaration of Conformity and the terms of sale. Therefore, provided the
manufacturer’s instructions are followed, the machine will not pose any risk to the
operator.
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