Operating Manual for
FAN Press Screw Separator PSS 1.1-300
25
13.3 INSPECTING AND REINSTALLING THE SCREEN
The wearing of the screen occurs primarily in
the area where the auger blades end in the
screen, i.e. at the transition to the pressing area
of the separator. If a sharp-edged transition can
be seen in this area (Fig. 13-9 left), the screen
was not installed again correctly after the previ-
ous inspection. In this case, the screen was
damaged due to insufficient floating capacity.
When you reinstall the screen, make sure that
the triangle stamped into the guide rod of the
screen is
“
up
”
[12 o
’
clock position], see also
Fig. 13-10. If this original installation position is
retained, it is possible to identify the causes for
any uneven wear on the basis of wear marks.
The screen must have sufficient floating capacity after reinstallation; in other words, it must not be under
axial tension from the housing and the mouthpiece. If installed correctly, the screen can be moved
somewhat by hand. A small gap of several tenths of a millimeter must exist between the mouthpiece and
the screen. This must be checked with a thickness gage (Fig. 13-11).
Fig.13-9 Wear in the screen due
to screen under tension (left)
Normal screen wear (right)
Inspection of the floating capacity with the
thickness gage
Fig. 13-11 Movable screen in the separator,
inspection of the floating capacity by hand
(left)
Fig.13-10 screen installation position, stamped triangle at top
and toward the front of the separator
