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Specification Value
Marley
/
Sigma Steel Cooling Tower
/
Specifications: Base
16
5.3 Motor shall be located outside the fan
cylinder at the fan deck, and shall be
connected to the speed reducer by
a tubular stainless steel, dynamically
balanced driveshaft equipped with neo-
prene flexible coupling elements.
5.4 A galvanized oil gauge and drain line
shall extend from the gear reducer to
the vicinity of the motor, and shall be
equipped with a dip stick for oil level
measurement.
5.5 The complete mechanical equipment
assembly for each cell shall be sup-
ported by a rigid, unitized support that
resists misalignment between the
motor and the gear reducer. Support
shall be heavy-wall tubular steel, to
which heavy plate platforms for the
motor and gear reducer have been
welded and the assembly shall be hot-
dip galvanized after fabrication. The
support assembly shall also provide
an inlet connection for incoming hot
water, and shall serve as a crossover
pipe to deliver water to both sides of
the tower.
5.6 The mechanical equipment assembly
shall be warranted for no less than five
(5) years. This warranty shall cover the
fan(s), speed reducers, driveshafts and
couplings, and the unitized supports.
■
The driveshaft turns at the motor speed and is, therefore, most sensi-
tive to operational imbalance. Stainless steel manufacture assures that
the driveshaft will not become unbalanced as a result of corrosion.
■ Fans of the size used on large cooling towers are applied at speeds and
horsepower that generate considerable torque—and structural tubular
steel resists this torque very effectively. Marley torque-tube assures that
all of the mechanical equipment remains aligned, and that the rotating
fan is properly positioned within the fan cylinder.
■
The value of a 5 year mechanical equipment warranty speaks for itself.
Except for the motor, all of the mechanical equipment on a Marley
tower is made by SPX Cooling Technologies. Cooling tower vendors
who purchase commercial fans, gear boxes, driveshafts, etc. may
require that you deal directly with those commercial suppliers for war-
ranty satisfaction.