Techne IFB-201 Bedienungsanleitung Seite 21

During operation the correct fluidising air flow rate must be determined by visually inspecting the surface
of the fluidised bath. When the fluidised bath is heated the air within the bath expands; it is therefore
necessary to decrease the amount of air supplied to the bath during the heat up period to ensure that
the bath is correctly fluidised at all times.
A modified manual control system is available which is fitted with air flowmeters. In this case, the correct
level of fluidisation may be set by adjusting the air flow rate in accordance with the valves recommended
within this manual or those gained by experience with individual installations. The air flow rate must still
be manually adjusted during the heat up period. A non standard version of this industrial fluidised bath
is available for applications where continued treatment of components contaminated by PVC and other
halogenated polymers is envisaged. This version is manufactured from materials that resist the effects of
corrosion which are experienced when processing the above polymers.
The compressed air supply to the fluidised bath must be kept clean, dry, and free from oil.
When used for processing items which may emit toxic or inflammable fumes it is essential that an
adequate fume extraction system be installed.
The extraction system must be correctly sized to ensure that any toxic fumes are removed from the
working environment.
To eliminate the risk of spontaneous ignition the concentration of inflammable fumes above the bath
and within the exhaust ductwork must be kept below the lower explosive limit. A later section of this
manual details the various fume treatment equipment that is available, and how it should be installed
and adjusted.
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