SPX Cooling Technologies Marley Sigma Steel Specifications, Specification Value, 8.0Casing

Marley / Sigma Steel CoolingTower / Specifications: Base

Specifications Specification Value

18

7.0Hot Water Distribution System:

7.1The mechanical equipment support/ crossover pipe shall deliver water to two open hot water basins per cell at the fan deck elevation. Water shall exit these basins to the fill by gravity through metering orifice-type polypro- pylene nozzles situated in the basin floor. Nozzles shall be easily removable and replaceable.

7.2Heavy-duty, industrial grade flow- control valves shall be provided at the inlet to each basin. These valves shall permit both flow balancing and maintenance shut-off to selected cells, or portions of cells. Valves shall have machined cast iron bodies, with stain- less steel operating stems, and heavy- duty locking handles.

8.0Casing:

8.1Tower endwalls shall be cased with corrugated FRP panels, attached with corrugations running vertically and overlapped one corrugation at joints. Tower corners shall be finished with

FRP corner rolls over the ends of the casing sheets.

8.2In the water-washed fill areas, inner casings of 16 gauge galvanized steel shall also be provided.

9.0Access:

9.1There shall be a 33" wide by 61" high access door in each endwall casing to provide access to the interior of the tower. Access doors shall be hinged and equipped with a latch operable from both inside and outside the tower. Internal partitions between cells shall include hinged doors to give free access through the tower.

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■Gravity-flow distribution basins are a feature of crossflow type towers. These basins are out where they can be easily inspected—even maintained—while the tower is in operation. Spray systems of counterflow towers, sand- wiched between the top of the fill and the drift eliminators, are extremely awkward to access and maintain.

■Marley flow-control valves remain serviceable for the life of the tower, and provide a continuing means of flow-regulation between hot water basins—and between cells of multicell towers as well. Towers without valves do not provide this valuable operating flexibility.

■Steel inner casings provide lateral sup- port for the fill that FRP panels cannot. They also support the FRP casing pan- els against the high wind loads that will act on the tower during its lifetime.

■The access doors on other towers may be unreasonably small. Specifying the size of the door will cause those bidders to take excep-