SPX Cooling Technologies SS-NC-08A - Manual (Page 8)

Specifications Specification Value
Marley / NC Class Stainless Cooling Tower / Specifications: Base
8
LOUVERS
DRIFT ELIMINATOR
separate from fill
on some models
FILL
7.0 Fill, Louvers and Drift Eliminators:
7.1 Fill shall be film type, thermoformed
of 0.40mm thick PVC, with louvers
formed as part of each fill sheet. Fill
shall be suspended from hot dip gal-
vanized structural tubing supported
from the 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. Fill shall be capable
of withstanding a hot water tempera-
ture of 52°C.
7.2 Drift eliminators shall be PVC, triple-
pass, and shall limit drift losses to
0.005% or less of the design water
flow rate.
■ Louvers integral with the fill keep the flowing water within the confines
of the fill. The separate external louvers used by others permit water to
escape the fill and form ice or produce an unsightly situation adjacent
to the tower and waste water. If you
plan to use your tower in the win-
tertime, particularly for free cooling,
integral louvers will put your operat-
ing concerns to rest. Integral louvers
offer the best available technology for
winter operation and water conserva-
tion.
Fill options are available for hot water
temperatures up to 60°C.
■ Drift rate varies with design water
loading and air rate, as well as drift
eliminator depth and number of
directional changes. A drift rate of
0.001% is readily available in standard
configuration without premium cost. If a
lower rate is required, please discuss with your
Marley sales representative.
Keep in mind…
• Drift for towers with three-pass high efficiency eliminators constitute a
small percentage of water usage.
• Unlike thermal performance, drift rates are not certified and field drift
tests are cost prohibitive for most applications.
• Drift rates below 0.001 are difficult to measure in the field.
• Certain water treatment chemicals can impact the drift rate.