Cold Water Collection Basins
If you plan to locate your tower above grade, a treated Douglas fir Marley cold water collection basin is available, complete with the necessary operating accessories. The basin floor is exterior grade, pressure-treated fir plywood, supported on joists. Basin sides are plywood, machined to fit the basin floor, providing a water-tight joint after sealing.
The standard wood basin includes at least one depressed, side-outlet sump. The number and size of sumps depends on the circulating water rate and the overall size of the tower. Unless otherwise specified, sumps include plugged drains and hot-dip galvanized debris screens. Standard sumps are FRP construction or hot-dip galvanized steel, depending on outlet size.
Stainless steel sumps and screens are available as options at extra cost.
Each basin includes an overflow/cleanout connection consisting of a galvanized full coupling and standpipe. The normally-installed standpipe ensures adequate freeboard in the cold water basin and removes easily for flush-out basin cleaning.
A float-operated, mechanical make-up valve provided with each basin automatically replenishes water lost from the system. The valve is located in the plenum chamber between fill banks, just inside the endwall access door to facilitate adjustment and maintenance.
/ Special Component Options /
High Design Loadings
Our engineers will make sure that your Sigma tower will withstand any higher-than-normal design loadings (wind, earthquake, decking, etc.) that you may specify. Clearly define any special design requirements in your tower specifications. We’ll make any necessary changes to the tower’s structural design. This is equally true if you anticipate incoming hot water temperatures above 120°F.
The specification should also describe the type of load system served by the tower, and include the expected water quality analysis, so that our engineers can select and recommend appropriate changes in component materials to assure satisfactory service. Discuss any questions about technical requirements with your trained Marley sales representative.
