Pre-hung door specification sheet with dimensions and ratings

NYC 9/11 Public Portal Document

PRESSURE DROP AREA FACTOR TABLE DETERMINING PRESSURE DROP 6.55 4.37 3.28 2.62 2.18 1.87 1.64 1.46 Use the Area Factor Table and 6.65 4.43 3.33 2.66 2.22 1.90 1.66 1.48 3.89 2.60 1.95 1.56 1.30 1.11 g g II JI Ml M? M? MJ Pressure Drop Chart to determine II .11 :1? .11 S .11 .11 :S .11 :ll .11 .5? 3.93 2.62 1.96 1.57 1.31 1.12 pressure drop through Ruskin CD82AF3/CD82AF4 control damp­ 1:11 Ml Ml g II 5? 11 3 ;ll 1709 79? 1.10 .81 .68 g 1 J? 1 ers. 1. Determine area factor for II Ml Ml II 11 .11 ;I1 g .82 .66 :11 .i g g g 1? damper by entering the Area Ml Ml 1? 769 .69 g :ll II 2 g JI B g g II :ll JI Factor Table through duct width and height. Ml g II .51 g g II g g :1^ JI JI JI JI JI g JI 2. Find the conversion velocity .38 g Ji JI .39 .11 :ll .11 JI JI :ll JI :ll JI g J] J? JI (CV) by multiplying the selected size damper’s area factor by .32 g g :ll .32 g 11 g JI JI Ji :ll JI JI J8 g g g II g ;I1 .27 .27 g g JI JI .JI .JI J? .J? JI .11 S II II II 11 I the flow rate in CFM; CV = Area Factor x CFM. 3. Enter the Pressure Drop Chart :ll [I ;ll .24 .24 g JI JI JI JI JI ;ll I :ll 5? :I1 11 II g J at the determined area factor and proceed up to appropriate g :ll g .21.19 g JI JI JI Ji JI II s 11 5? g g :ll .11 .21 conversion velocity (CV) line. Then, read across to static g g g .17 .19 ;ll JI JI JI -.11 Jl g S :ll II II II JI JI aa :11 g .17 g .15 :tl JI JI :g :ll 11 11 1 :ll II II II 11 .16 JI J] JI g g .:ll .H 51 :ll .11 .11 :g 11 pressure drop at left side of chart.

;ll JI .14 JI JI g 11 IT g K S' II 11 11 11 11 .14

.13 JI II g g 1 II g 11 .11 g :ll g JI .13 11 11 II II g -.11 JI .11.12 :t5 11 •.n g II g [i 11 g 11 II II II .12 & g g JI .12 g :ll 11 g g II :ll 11 11 11 5: II II :ll II Example: Find the pressure drop across an 18" wide x 18" high Model CD80AF4 control damper handling 8570 CFM. From the Area Factor Table, area factor is determined to be .58. CFM X AREA FACTOR EQUALS CONVERSION VELOCITY Therefore, CV (Conversion Velocity) = 8570 CFM x .58 = 5000. Using the pressure Drop Chart, pressure drop = .20 inches water gage.

CD80AF PRESSURE DROP CHART 10 .90 .SO 70 .80 .50 <0 o .40

o .30

IM .20 • O x: o .10 lU .09 .08 fiC .07 3 06 W w 06 UJ 04 fiC Q. 03 2 »- 02

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01 .02 04 05 06 06 3 4 5 6 20 30 8 10 07 09 7 9

NOTE: AREA FACTOR 1. Ratings are based on AMCA Standard 500 using Test Setup Apparatus Figure 5.3 (damper is installed with duct upstream and down­ stream). 2. Static Pressure and Conversion Velocities are corrected to .075 Ib./cu. ft. air density.

NYC-WTC_000166825