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The MARPAK Advantage
Fixed film media has traditionally been made in
2 ft height increments due to production
limitations (sizes of thermoformers and molds
to create the media sheets). Marley cooling
tower fill has been produced for over 30 years
and the advantage of taller fill heights has been
recognized. This has resulted in the development
of larger thermoformers to product fill media up
to 6 ft tall.
There are several advantages of taller media,
primarily due to the presence of fewer interfaces
between modules:
• Less deflection under load because the edge-
to-edge interface between modules deforms
more than the internal structure of the media.
• Less clogging by biosolids because module
interfaces produce a blockage location due to
exposed media edges.
• Less air blockage (pressure drop) for better air
distribution.
• Less installation time.
Just as with a cooling tower, water and
air distribution efficiency is critical to the
performance of a trickling filter. For that reason,
SPX advocates minimizing the number of
module interfaces by using taller modules in any
media installation, whether for a cooling tower or
for a trickling filter.
MARPAK Advantages
Taller heights of 4 ft (MXF 4800 and MXF 3000)
and 6 ft (MCR 3100).
Taller MARPAK modules mean:
• Stability—Less settling over you filter's life
• Efficiency—Less clogging by biomass at
module interfaces
• Performance—Less air blockage due to
interfaces
• Quicker Installation—Fewer modules to handle
In third-party test of MXF 3000 media, two 2 ft
tall modules deflected nearly 70% more than
two 4 ft tall modules*. For example, if filter media
with 2 ft tall modules settle by 4 in during its
lifetime, 4 ft tall modules in the same filter will
settle less than 2
3
⁄8 in.
*Based on percentage of height.