Pre-hung door specification sheet with dimensions and ratings

NYC 9/11 Public Portal Document

CD80AF3 and CD80AF4 PERFORMANCE DATA

PRESSURE LIMITATIONS

CD80AF3 60" Pressure limitations shown on charts S.^ 48" at left allow maximum blade deflec­ tion of 1/180 of span on 60" damper §1 widths. Deflections in other damper widths (less than 48") at higher pres­ □ .2 sures shown will result in blade de­ E o flection substantially less than 1/180 24" of span. <Q (A s 12" 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Pressure Differential* (Inches Water Gage)

The CD80AF3 may be used in systems with total pressure exceeding 13" w.g. by reducing the damper section width as indicated in the chart. A maximum design total pressure of 17" w.g. would require a CD80AF3 damper with maximum section width of 36".

CO80AF4 60"

) S.x:48" *NOTE:Damper should be specified for a2 fan shut off pressure. Pressure differen­ tial is not system pressure, but is the 3.2 maximum pressure the damper will .§ o encounter with blades closed. iS524'- S 12" 18 20 22 24 26 28 30 32 34 36 38 40 42 44 Pressure Differential* (Inches Water Gage)

The CD80AF3 may be used in systems with total pressure exceeding 20" w.g. by reducing the damper section width as indicated in the chart. A maximum design total pressure of 26” w.g., tor example, would require a CD80AF3 damper with maximum section width of 48".

The CD80AF dampers may tolerate higher pressure limitations than those shown here. Conservative ratings are presented intentionally in an effort to avoid misapplication. Consult Ruskin or your Ruskin representative when a damper is to be applied in conditions exceeding recommended maximums.

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