Specifications
The CD60 may be used in systems with total pressures exceeding 3.5" by reducing
damper section width as indicated. Example: Maximum design total pressure of 8.5" w.g.
would require CD60 damper with maximum section width of 36" (914).
Pressure limitations shown above allow maximum blade deflection of 1/180 of span on
60" (1524) damper widths. Deflections in other damper widths (less than 48" [1219]) at
higher pressures shown will result in blade deflection substantially less than 1/180 of
span.
CD60 PRESSURE LIMITATIONS
Maximum Design Total Static Pressure
Inches Water Gage
3
4
5 6 7 8 9 10 11 12 13
60"
(1524)
48"
(1219)
36"
(914)
24"
(610)
12"
(305)
FACE VELOCITY - FEET/MINUTE
AMCA FIG. 5.3
CD60 sizes 12 x 12, 24 x 24, 48 x 12, 12 x 48, 36 x 36 (305 x 305, 610 x 610, 1219 x 305, 305 x 1219, 914 x 914)
All data corrected to represent standard air at a density of 0.075 lbs/ft
3
.
VELOCITY VS. PRESSURE DROP
Maximum Damper Section Width
CD60 AMCA LICENSED PERFORMANCE DATA
PRESSURE DROP - INCHES W.G.
Leakage testing conducted in accordance with AMCA Standard 500-
D-98. Torque applied holding damper closed, 5 in. lbs./sq. ft. on
opposed blade dampers and 7 in. lbs./sq. ft. on parallel blade
dampers. Air leakage is based on operation between 50°F to 104°F.
All data corrected to represent standard air density 0.075 lbs/ft
3
.
1 IN. W.G. 4 IN. W.G. 8 IN. W.G.
12" (305)
24" (610)
36" (914)
48" (1219)
60"(1524)
IA
IA
IA
IA
IA
I
I
I
I
I
II
II
NA
NA
NA
Ruskin Company certifies that the CD60
shown herein is licensed to bear the AMCA
Seal. The ratings shown are based on tests
and procedures performed in accordance with
AMCA Publication 511 and comply with the
requirements of the AMCA Certified Ratings
Program.The AMCA International Certified
Ratings Seal applies to Air Performance and
Air Leakage.
DAMPER WIDTH (INCHES)
1A
1
2
3
1" (0.25 kPa )
3 (15.2)
4 (20.3)
10 (50.8)
40 (203)
4" (1.0 kPa)
N/A
8 (40.6)
20 (102)
80 (406)
8" (2.0 kPa)
N/A
11 (55.9)
28 (142)
112 (569)
12" (3.0 kPa)
N/A
14 (71.1)
35 (178)
140 (711)
Pressure/
Class
Leakage, L/s/m
2
(ft
3
/min/ft
2
)
Required Rating Extended Ranges (Opt.)