Pentair PR AQUA ROTOFILTER Installation And Operation Manual page 44

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SECTION 11: SCREEN MAINTENANCE
11.5.2 Procedure
Always follow the proper shutdown procedure
(Section 8.2 or 8.3) before performing any
maintenance on the Rotofilter.
1. Remove any grease or oil from the circumferential
and channel sections of the drum that will affect
screen gasket adhesion. Wipe thoroughly.
2. Apply screen gasket to the left and right side of
the circumferential sections of the drum. These
are the front and back rounded sections of the
drum. Gasket should be flush with inside edges
of screen openings and abutting both tapped flat
bars. See Figure 44.
Figure 44. Gasket abutting the flat bar
3. Apply gaskets to the left and right sides of the
drum channels between the circumferential
gaskets. Use a razor blade to create tight joints
between the gasket. See Figure 45.
Gaskets must abut tightly against
the circumferential gaskets. Use a
razor blade to make all gasket cuts
to ensure tight joints. Ensure sides of the gaskets
are parallel with the start of the rounded edge of
the drum channel.
PR Aqua Rotofilter Drum Filter Installation and Operation Manual
™
Figure 45. Cutting gasket for tight joints
4. Replace the retainer bar on the rear drum
channel using the bolts and new nylocs. Use anti-
seizing compound on all fasteners. Hand-tighten
the nylocs. Fasteners may be hex head screws.
Do not reuse nyloc fasteners.
Nylocs are no longer effective after
being removed.
5. Insert the lower screen panel under the retainer
bar, then insert the upper screen. Ensure the set
screws are threaded away from screen panel
to allow the panel to clear the set screws while
installing. See Figure 46.
Figure 46. Installing a screen panel