Marley / Sigma F Series CoolingTower / Specifications: Base | 14 |
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Specifications |
| Specification Value |
3.0Construction:
3.1 | The tower shall be capable of with- | ■ The limiting water quality values indicated are those which are |
| standing water having a pH of 6.5 to | acceptable for the normal materials of construction specified. If |
| 8.0; a chloride content (NaCl) up to 750 | water of more aggressive quality is anticipated please change |
| ppm; a sulfate content (SO4 ) up to | hardware material requirement to series 316 stainless steel, or |
| 1200 ppm; a calcium content (CaCO3) | silicon bronze, as you may have agreed upon beforehand with |
| up to 800 ppm; silica (SiO2) up to 150 | the Marley sales representative. |
| ppm; and design hot water tempera- | If there is any doubt in your mind as to the grade of hardware |
| tures up to 120°F (48.9°C). The circulat- | |
| ing water will contain no oil, grease, | that is appropriate to your water quality, please have a sample of |
| fatty acids, or organic solvents. | it analyzed and provide Marley with a copy of the analysis. |
3.2The structural framework of the tower shall be pultruded or molded fiberglass, designed in accordance with ASCE Structural Plastics Design Manual. All allowable design values shall be factored for wet service, temperature, and duration in accordance with standard engineering practices.
3.3 | Basic design criteria shall be 30 psf | Discuss higher design loadings with your Marley sales represen- |
| (1.44 kPa) wind load and 5%g seismic | tative. |
| load. |
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3.4 | Multicell towers shall include stainless | Multicell towers must have plenum partitions between cells. |
| steel partitions between cells in the fill | Otherwise, air will be induced downward through an inoperative |
| areas, and fiberglass partitions in the | fan, bypassing the fill entirely. Without these partitions, |
| plenum area. Partitions shall extend | or |
| the full height of the tower from the | isfactory. |
| base of fill to the underneath side of | Fill partitions prevent the random migration of water from cell to |
| the fan deck. | |
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| cell, and permit individual cell operation during reduced ambient |
3.5 | Column lines shall be on no greater | or low load conditions. |
| than |
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| and the base of all columns shall be |
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| firmly anchored to series 304 stainless |
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| steel base plates. Framing joints shall |
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| be made with 1/2" diameter or larger |
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| series 300 stainless steel machine |
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| bolts. Critical framing joints shall be |
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| augmented with 1.06" OD heavy wall |
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| fiberglass sleeves to transmit loads. |
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3.6 | No field gluing of joints, or any other | The variable weather conditions encountered during |
| structural member, will be allowed. | construction of cooling towers does not result in the stable condi- |
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| tions of temperature and humidity that assure proper bonding |
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| during the gluing process. |
