Maintenance - Techne IFB-201 Operator's Manual

Rubber debonding
Polycarbonate
Polystyrene
Organic matter oil/grease
High density polythene
Polyesters
Flouropolymers
Styrene

Maintenance

1. The aluminium oxide fluidising medium, not being degradable, will only require
replacement when losses occur due to attrition and spillage, or contamination with inert
pigments, fillers or acidic by products from the cleaning process. Fluidising medium lost
through entrainment in the exhaust may be collected in a cyclone trap. Should the
fluidised bath be stored for long periods of time under damp or humid conditions,
moisture may be absorbed by the alumina which is hydroscopic. To avoid violent
fluidization which occurs when damp alumina is heated above 100ººC, operate the bath
for a period of approximately 8 hours at 90oC prior to operation at elevated temperatures.
NEVER ADD COLD OR DAMP ALUMINA TO A HOT BATH AS THIS WILL ALSO
CAUSE VIOLENT FLUIDISATION WHICH CAN BE DANGEROUS. Allow the bath to
cool then add the fresh alumina. If this fresh alumina is a large proportion of the charge
then dry the whole charge as above.
2. On a daily basis at least, the bed should be cleaned of floating residues by means of a
wire mesh hand scoop. This procedure removes carbon char which impairs fluidisation
and acts as an absorbent.
3. The air line filter supplied with the fluidised bath is self draining. However, it should be
kept in good condition by inspection at two weekly intervals and by cleaning the bowls
and washing or replacing the filter elements as necessary. With exceptionally dirty or wet
air supplies this frequency may have to be increased. Free water or water vapour in the
air supply is a notorious source for the production of hydrochloric acid in the bed when
PVC is being processed.
a. B13 Regulator Filters
On automatic-drain models no adjustments are necessary. Clean filter element
and automatic-drain protective screen regularly. If required automatic-drain
models can be manually tripped by pushing a blunt ended rod up through the
bottom of the mechanism to completely purge the bowl.
To remove the filter element shut off the air supply (bleed off pressure from unit
unless exhaust type Shut-Off Valve fitted) and unplug filter from the Unidaptor.
Replace with standby unit and service filter at workbench.
Unscrew the bowl anti-clockwise, unscrew the baffle from the stacked rod and
withdraw the element, gasket, louvre and 'O' ring.
Wash element in paraffin and blow out thoroughly with compressed air. Clean
plastic bowl in SOAPY WATER.
The filter element, part code 6009248, may be replaced if heavily contaminated.
b. F51 Filters
Unscrew bowl, complete with gasket/.O. ring, and the main element by hand.
Remove prefilter element. On F51 models this pre-filter element is retained by a
nut and incorporates a spacer. Partial cleaning of the pre-filter element can be
achieved by washing in warm water and detergent, and drying with compressed
350(debonding)
400-425
450
450-500
450
450
500
450
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