Introduction:
The AF fully automatic back-flushing filter removes solid
contaminants from water and emulsions. The filtered residues are
discharged fully automatically without any interruption of the
filtration process. The extremely simple and robust design of
these filters, as well as their reliable and fully automatic mode
of operation ensure high functional reliability and minimum running
cost.
The high-precision needle-slot candles are made of Stainless
Steel, Duplex, Super Duplex or Titanium, have a filtration-range
from 5000 micron to 25 micron. The filtered solids are systematically
removed from the filter during the back-flushing operation. Back-flushing
is actuated as a function of the differential pressure or a pre-set
time, depending on the degree of contamination of the needle-slot
candles.
As cleaning always involves only a small part of the filtration
area, i.e. only a small number of filter candles are cleaned at
any time, back-flushing is very fast and highly effective. Filtration
is not interrupted during the back-flushing process. The only
moving parts are the back-flushing arm and the flow control device;
their plastic bushings re-adjust automatically and therefore wear
and maintenance costs are extremely low.