Specifications
Specification Value
Marley
/
MD Cooling Tower
/
Specifications: Base
31
7.0 Fill, Louvers and Drift Eliminators:
7.1 Fill shall be cross-corrugated,
counterflow film type, thermoformed
from0.40mmthickPVC.Fillshall
be assembled into packs for ease of
removal and cleaning. Fill shall be sup-
ported on channel sections supported
from the tower structure and have a
flame spread rating less than 25. Drift
eliminatorsshallbePVCwithamini-
mum of three changes in air direction,
and shall limit drift losses to no more
than 0.001% of the design water flow
rate.
7.2 Air inlet louvers shall be a minimum of
127mmairtravel,triplepassPVCto
prevent water splashout and eliminate
sunlight from entering the collection
basin. For ease of service and long
lifeoflouvers,PVClouversshallbe
enclosed in a removable frame that
attaches to the air inlet without tools.
Louvers with less than three changes
in air direction are unacceptable.
8.0 Hot Water Distribution System:
8.1 A pressured spray system shall dis-
tribute water evenly over the fill. The
branch arms shall be corrosion resis-
tantPVCwithpolypropylenespraynoz-
zles attached to the branch arms with
a rubber socket connection for ease of
removal and cleaning. To ensure proper
spray system operation, nozzles shall
seat in branch arms without regard for
direction or alignment.
9.0 Casing and Fan Guard:
9.1 The casing shall be heavy gauge
EN10142:2000 grade Z600 galvanized
steel and shall be capable of with-
standing the loads described in para-
graph 4.1. Casing panels shall encase
the fill on all four sides of the tower.
The top of the fan cylinder shall be
equipped with a conical, non-sagging,
removable fan guard, fabricated of
welded 5/16" and 7 gauge rods, and
hot dip galvanized after fabrication.
■ Fill modules can be removed for inspection and cleaning in accor-
dance with local anti legioinella guidelines.
Drift rate varies with design water loading and air rate, as well as
drift eliminator depth and number of directional changes. The indi-
cated rate of 0.001% is easily achievable without premium cost. If a
lower rate is required, please discuss with your Marley sales repre-
sentative.
■ The combination of PVC piping and polypropylene nozzles is very
resistant to the build-up of scale and slime.
