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Rectangular Volume Control Dampers
D1 Series
D1 Series
The D1 series is an extremely low
leakage damper with rugged steel
airfoil blades designed to meet the
highest standards established. It is
intended for application in medium
to high pressure and velocity
ratings.
SPECIFICATIONS
Size Range
1
Minimum Size
One Blade ..........................................6 in. wide by 6 in. high
Two Blade ...........................................6 in. wide by 10 in. high
Maximum Size
Single Section ....................................60 in. wide by 74 in. high
Multiple Section ..................................unlimited
Temperature Rating ............................180 F (82 C) maximum
2
Standard Construction
3
Blade: .................................................14 gauge galvanized steel,
airfoil shaped
Action: ................................................Parallel or Opposed
Frame
3
: ..............................................16 gauge galvanized steel
Hat-channel
Bearings
3
...........................................Synthetic (Acetal)
Linkage
3
.............................................Steel Side linkage out of
airstream (concealed in frame)
Axles
3
.................................................1/2 in. diameter plated steel
Jamb Seals
3
.......................................304 Stainless Steel
Blade Edge Seals
3
.............................Silicone
1
Width and height dimensions furnished 1/4 in. undersized - standard
2
Temperature rating can higher with a different
3
See table for customized options
FLANGE OPTIONS
Performance Data
D1 Pressure and Velocity Limits.
DIMENSIONS DIAGRAM
LEAKAGE RATE
M18986
STANDARD
(NO FLANGE)
ACTUATOR SIDE FOR
INTERNAL MOUNTING
SINGLE
FLANGE
SINGLE
REVERSE
FLANGE
ACTUATOR SIDE FOR
INTERNAL MOUNTING
DOUBLE
FLANGE
Damper Size
in in.
Maximum
System Pressure
Maximum
System Velocity
12 x 12 8.0 in. wg 4000 fpm
24 x 24 8.0 in. wg 4000 fpm
36 x 36 6.3 in. wg 3500 fpm
48 x 48 4.7 in. wg 3000 fpm
60 x 60 2.0 in. wg 2500 fpm
H
W
M13905
1 2 3 4 5 6 7 8 9 10 20 30 40
50
60
70
80
90
100 150
AIR LEAKAGE (CFM/FT
2
)
STATIC PRESSURE DIFFERENCE (IN. WG)
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
8.5
M13906
D1