Operating Manual for
BAUER Separator S300
27
Fig. 13-15 Measuring of the working gap between the screen and the auger;
the gap is measured on the bottom side of the screen while the machine is at
rest. The measurement yields two times the working width because the screen
rests on the top of the auger when the machine is nut running.
13.5 EVALUATION CRITERIA FOR THE AUGER AND SCREEN WITH REGARD TO WEAR
AND RECOATING
All moving parts on the separator are subject to some amount of wear. Some of the parts that are directly
subject to wear and must therefore be inspected regularly have already been described. Good regular
inspections and maintenance of the wearing parts will significantly lengthen the service life of the parts.
Worn parts should be replaced as quickly as possible in order to avoid the damage that might otherwise
result.
The parts that directly influence the operation of the separator are the screen and the auger. Independent
of this, the
“
normal
”
operating condition of the separator is also influenced by parameters other than wear.
In principle, only the auger can be recoated to be used again; the screen cannot be recoated
In order to ensure the necessary quality and precision, the recoating of the auger may only be performed
by a workshop authorized by BAUER GmbH
WARNING
Never hire another shop to recoat the auger for you since incorrect performance and
failure to observe the necessary tolerances could destroy the screen and void all
warranty claims (see Fig. 13-8 Screen wear).
The normal wear of the screen can be observed as an increase in the inner diameter and the screen gap
width. The wear of the screen and the auger generally affects the proper functioning of the separator and
can be identified based on reduced throughput and worse drainage of the liquid phase. However, when
observing such changes, it must also be ruled out that the supply medium and its consistency have
changed.
Wearing of the screen or of the auger on the
outer edges of the blade changes the working
gap. In new condition, the working gap and
therefore the radial gap between the screen
and the auger (initial gap width) is approx. 0.2 -
0.4 mm; this can be measured with a thickness
gage (Fig. 13-15).
If the radial gap between the screen and the
auger becomes twice the initial gap width or
larger, this influences not only the operating
condition but also poses the risk that the
screen could be damaged or even split. If the
radial gap between the screen and the auger is
still larger than two times the original gap width
even after replacing the screen, the auger
must be recoated
The most important criterion for the wear of the screen and the auger is however the operating condition
of the machine; in other words, if the result no longer satisfies the requirements (throughput, liquid phase,
etc.), the screen must be replaced and/or the auger recoated.
Additional indications for the need to recoat the auger can be found in the appearance of the plating ma-
terial as shown below in Fig. 13-16.
In principle, the auger should be recoated before the plating has been removed by wear, uncovering the
base material of the auger. Otherwise, the wear on the auger will increase severely enough that it can no
longer be recoated at reasonable expense.
