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Specifications
Specification Value
Marley
/
Sigma 1000/1200 Cooling Tower
/
Specifications: Base
19
6.0 Fill, Louvers and Drift Eliminators:
6.1 Fill shall be film-type, 15 mil thick,
thermoformed PVC, with louvers
formed as part of each fill sheet. Fill
shall be suspended from stainless
steel structural tubing supported from
the upper tower structure, and shall
be elevated above the floor of the cold
water basin to facilitate cleaning. Air
inlet faces of the tower shall be free of
water splash-out.
6.2 Drift eliminators shall be PVC, triple-
pass, and shall limit drift losses to no
more than 0.010% of the design GPM
flow rate.
■ Louvers integral with the fill
keep the flowing water within
the confines of the fill. The sep-
arate external louvers used by
others permit water to escape
the fill and form ice or produce
an unsightly situation adjacent
to the tower. If you plan to use
your tower in the wintertime,
particularly for free cooling,
integral louvers will put your
operating concerns to rest.
Vertical blade-type eliminators, as
well as misdirected cellular types, cause
much of the fan power to be wasted in turn-
ing the horizontal flow of air vertical for its exit through the fan
cylinder. This power is, of course, not available for contribution to
thermal performance.
Drift rate varies with design water loading and air rate, as well
as drift eliminator depth and number of directional changes. The
indicated rate of 0.010% or less is easily achievable without pre-
mium cost. If a lower rate is required, please discuss with your
Marley sales representative.
Louver
Section
Drift Eliminator
Section
Fill Section