Marley / Sigma F Series CoolingTower / Specifications: Base

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Specifications

 

Specification Value

4.0Fan Deck and Fan Cylinder:

4.1

The fan deck shall act as a working

■The indicated design values for framing and decking not only

 

platform for maintenance personnel. It

give you assurance that the tower can withstand long term

 

shall consist of 1 1/8" (28.5 mm) deep

operation in a hostile environment—but that it will accept many

 

pultruded fiberglass interlocking pan-

years of inspection and maintenance traffic by your operating

 

els, supported by structural fiberglass

personnel.

 

joists on 3'-0" (914 mm) maximum

 

 

centers. Fan deck shall have a nonskid

 

 

surface. Deck shall be designed for a

 

 

uniform live load of 60 psf (2.9 kPa)

 

 

or a concentrated load of 400 pounds

 

 

(181 kg). Mid-span deflection at 60 psf

 

 

(2.9 kPa) loading shall not exceed 0.17"

 

 

(4.3 mm).

 

4.2

Fan cylinders shall be molded FRP.

Fiberglass-reinforced polyester fan cylinders provide the close tip

 

They shall be anchored to the fan deck

clearances and smooth airflow contour necessary for good fan

 

structure to provide a consistently

performance. The inert, noncorroding nature of FRP assures that

 

stable operating shroud for the fan.

these characteristics will persist.

5.0Mechanical Equipment:

5.1

Fan(s) shall be propeller-type, incor-

■ Standard fan drives of other manufacturers may use V-belts.

 

porating heavy duty blades of high

Considering the size of fans involved—and the horsepower

 

strength, inert fiberglass reinforced

applied—this is not good design practice. Geareducer drive is

 

epoxy material. Blades shall be indi-

far more reliable and trouble free, and is currently offered as an

 

vidually adjustable and replaceable.

option by most other cooling tower manufacturers.

 

Fan(s) shall be driven through a right

The primary means of capacity control on cooling towers is by

 

angle, industrial-duty, oil-lubricated,

 

geared speed reducer. Speed reducers

cycling fans on and off, or through a variety of speed changes.

 

employing pulleys and belts will not be

Such cycling can stretch V-belts, and can reduce their service life

 

accepted.

significantly.

5.2

Motor(s) shall be ____ hp maximum,

Unless otherwise specified, motor speed will be 1800 RPM in

 

TEFC, 1.15 service factor, and specially

60 Hertz areas and 1500 RPM in 50 Hertz areas. If you prefer the

 

insulated for cooling tower duty. Speed

operating flexibility of two-speed operation, please specify the

 

and electrical characteristics shall be

RPM to be 1800/900 (1500/750 in 50 Hertz regions). Other speed

 

1800 (1800/900) RPM, single winding,

ranges are also available,

 

___ phase, ___ hertz, ___ volts.

 

5.3

Motor shall be located outside the fan

The driveshaft turns at the motor speed and is, therefore, most

 

cylinder at the fan deck, and shall be

sensitive to operational imbalance. Stainless steel manufacture

 

connected to the speed reducer by a

assures that the driveshaft will not become unbalanced as a

 

tubular stainless steel, dynamically bal-

result of corrosion. Stainless steel yokes are available at extra

 

anced driveshaft with heavy galvanized

cost, although not normally necessary.

 

yokes and neoprene flexible coupling

 

 

elements.

 

 

➠

 

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SPX Cooling Technologies FSIG-TS-08A specifications Fan Deck and Fan Cylinder, Mechanical Equipment
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FSIG-TS-08A specifications

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