SPX Cooling Technologies FSIG-TS-08A specifications Fill, Louvers and Drift Eliminators

Marley / Sigma F Series CoolingTower / Specifications: Base 16

Specifications Specification Value

5.4A stainless steel oil fill and drain line shall extend from the gear reducer to the vicinity of the motor, and shall be equipped with a bronze-bodied oil level sight-glass gauge.

5.5The 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.

5.6The mechanical equipment assembly shall be warranted for no less than five

(5) years. This warranty shall cover the fan(s), speed reducer(s), driveshaft(s), couplings, and the unitized supports.

6.0Fill, Louvers and Drift Eliminators:

6.1Fill shall be film-type, 15 mil (0.38 mm) 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 splashout.

6.2Drift eliminators shall be 15 mil

(0.38 mm) thick PVC, formed as part of each fill sheet, triple-pass, cellular type, and shall limit drift losses to 0.005% or less of the design water flow rate. The final pass of the eliminators shall direct the air toward the fan.

The extended oil line to an oil gauge provides a safe and convenient means of checking the level of oil in the Geareducer.

Fans of the size used on large cool- ing towers are applied at speeds and horsepowers that generate consider- able torque—and structural tubular steel resists this torque very effectively. The Marley torque-tube design assures that all of the mechanical equipment remains aligned, and that the rotating fan is properly positioned within the fan

cylinder. Hot-dip galvanizing after fabrication assures that all steel surfaces will be heavily coated with zinc for long-term protection against corrosion.

Even in aggressive water conditions, the heavy construction of the unitized support normally precludes the need for stainless steel. It is available, however, at extra cost.

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 Marley. Cooling tower vendors who purchase commercial fans, gear boxes, driveshafts, etc. may require that you deal directly with those commercial suppliers for warranty satisfaction.

■Louvers integral with the fill keep the flowing water within the confines of the fill. The separate external louvers used by oth- ers 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 lou- vers 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 turning 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. A drift rate of 0.001% is readily available in standard configuration with- out premium cost. If a lower rate is required, please discuss with your Marley sales representative.