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ROUND LOW & MEDIUM PRESSURE DAMPER SIZES
ROUND LOW PRESSURE DAMPER
SIZE DIAMETER (D) LENGTH (L)
PART #
4"
TR04
5"
TR05
6"
TR06
7"
TR07
8"
TR08
9"
TR09
10"
TR10
12"
TR12
14"
TR14
16"
TR16
ROUND MEDIUM PRESSURE DAMPER
SIZE DIAMETER (D)
PART #
STMPD06
STMPD08
STMPD10
10"
STMPD12
12"
STMPD14
14"
STMPD16
16"
STMPD18
18"
* These air quantities were derived from a duct sizing chart .1" friction loss per 100' of duct. All CFMs listed are
approximate. For accurate selection use duct sizing table or device.
4"
10"
5"
10"
6"
10"
7"
10"
8"
10"
9"
11"
10"
12"
12"
14"
14"
16"
16"
18"
LENGTH (L)
6"
6"
10"
8"
8"
10"
10"
12"
12"
14"
14"
16"
16"
18"
18"
20"
TYPICAL ROUND CAPACITIES*
Duct
Nominal
Diameter
CFM
4"
40
5"
70
6"
110
7"
160
8"
250
9"
320
10"
410
12"
660
14"
1000
16"
1450
18"
2000
WIDTH (W)
6"
7"
9"
10"
11"
12"
13"
15"
17"
18 1/2"
L
WIDTH (W)
9"
11"
13"
15"
17"
19"
21"
Duct Velocity
Damper
FPM
P " WC
∆
450
.013
525
.013
540
.014
600
.014
700
.015
725
.015
750
.015
850
.022
925
.035
1070
.036
.036
1100
ZONE DAMPERS
W
D
14
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