Techne IFB-51 Bedienungsanleitung Seite 21

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 control system with automatic air control is also available. This system is designed to automatically
adjust the fluidising air flow rate as the bath heats up. This allows the system to be operated without
supervision and is useful in applications where it is advantageous to preheat the bath prior to the start
of the working day.
The system is programmed to feed a set amount of fluidising air to the bath between room temperature
and 200°C. When the bath reaches this temperature, the amount of air feed to the bath is reduced and
held at constant value until the temperature of the bath exceeds 400°C, at which point a further
adjustment is made.
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 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 duct work 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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