SPX Cooling Technologies 7013F081 - 7013J121 specifications Coil, Design Loading, Construction

Marley / MC Fluid Cooler / Specifications: Base

Specifications Specification Value

17

the test and will make such corrections as are appropriate and agreeable to the owner to compensate for the perfor- mance deficiency.

4.0Coil:

4.1Coil(s) shall consist of fully welded box headers with serpentine coils and hot-dip galvanized after fabrication. Coils shall be tested to 2757 kPa air pressure while immersed in water. Maximum operating design pressure shall be 1551 kPa. The coil shall be designed for free drainages of fluid at shutdown.

5.0Design Loading:

5.1The fluid cooler and its components shall be designed to withstand a wind load of 1.44 kPa. The fluid cooler shall be designed to withstand shipping and hoisting loads of 2g horizontal or 3g vertical. Handrails, where specified shall be capable of withstanding a 890

N concentrated live load in any direc- tion and shall be designed in accor- dance with OSHA guidelines.

6.0Construction:

6.1Except where otherwise specified, all components of the fluid cooler shall be fabricated of heavy-gauge steel, protected against corrosion by G600 galvanizing. After passivation of the galvanized steel (8 weeks at pH 7-8, and calcium hardness and alkalinity at

100-300 mg/L each), the fluid cooler shall be capable of withstanding water having a pH of 6.5 to 9.0; a chloride content up to 500 mg/L as NaCl (300 mg/L as Cl-); a sulfate content (as SO4) up to 250 mg/L; a calcium content (as CaCO3) up to 500 mg/L; silica (as SiO2) up to 150 mg/L; and design operat- ing ranges up to 10°C. The circulating water shall contain no oil, grease, fatty acids, or organic solvents.

6.2The specifications, as written, are intended to indicate those materials that will be capable of withstanding the above water quality in continuing service, as well as the loads described in paragraph 4.1. They are to be regarded as minimum requirements. Where component materials unique to individual fluid cooler designs are not specified, the manufacturers shall

■The MC Fluid Cooler coil is suitable for cool- ing water, oils and other fluids compatible with carbon steel in a closed, pressurized system. Each coil is constructed of all- prime surface, continu- ous steel tubing, formed into a serpentine shape

and welded into an assembly. The complete assembly is then hot-dip galvanized after fabrication. Design pressure is 1551 kPa, and each coil is tested to 2757 kPa air pressure under water. Tubes are sloped to pro- vide free drainage when vented.

■The indicated design values are the minimum allowables under accepted design standards. They give you assurance that the fluid cooler can be shipped, handled, hoisted—and ultimately operated in a normal fluid cooler environment. Most MC Series models will with- stand significantly higher wind and seismic loads. If your geographic location dictates higher wind load or seismic load values, please make the appropriate changes, after discussion with your Marley sales representative.

■■ In the history of fluid coolers, no other coating for carbon steel has exhibited the success and longevity of galvanization in exposure to the normal fluid cooler water quality defined at left. No paints or electrostatically-applied coatings, however exotic they may be, can approach galvanization's history of success.

If extended longevity of the fluid cooler is required—or unusually harsh operating conditions are expected—consider specifying stain- less steel as either the base construction material, or the material utilized for specific components of your choice. See Stainless Steel Options on page 17.