18
RECTANGULAR ZONE DAMPERS
The rectangular zone dampers are available in either low pressure or heavy duty. For systems under 5 tons,
use low pressure dampers. For systems 5 tons or over, use heavy duty dampers. Motor drive time open
and close is 90 seconds.
HEAVY DUTY RECTANGULAR DIMENSIONAL DATA
Part Number
STCRX
W x H
Sizes available from 8” x 8” up to 48” x 48”
RECTANGULAR HEAVY DUTY ZONE DAMPERS (STCRX)
D
H
MOTOR
D
2 ½”
48” MAXIMUM WIDTH
ZONE DAMPERS
Rectangular Damper Capacities*
WIDTH IN INCHES
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
8
300
400
500
610
710
820
925
1050
1175
1250
1400
1500
1600
1725
1825
2000
2100
2200
2275
2400
2525
10
400
540
680
825
975 1125 1300 1400
1590
1750
1975
2100
2175
2400
2600
2775
2900
3000
3200
3400
3600
12
500
680
850 1000 1200 1400 1600 1850
2000
2300
2550
2700
2850
3100
3400
3600
3800
3975
4200
4450
5775
14
610
825 1000 1250 1500 1750 2000 2250
2500
2900
3150
3425
3625
3825
4200
4600
4800
5000
5300
5750
6000
16
710
975 1200 1500 1800 2100 2450 2700
3000
3600
3950
4200
4425
4650
5100
5600
5780
6025
6500
7000
7400
18
820 1125 1400 1750 2100 2500 2850 3080
3600
4400
4600
4950
5100
5600
6000
6500
7000
7150
7600
8100
8600
20
925 1300 1600 2000 2450 2850 3400 3775
4000
4800
5500
5700
6000
6600
7100
7900
8025
8500
9000
9600 10075
22
1050 1400 1850 2250 2700 3080 3775 4300
4800
5100
6000
6350
6800
7200
7800
8600
9000
9600 10000 11500 12500
24
1175 1590 2000 2500 3000 3600 4000 4800
5400
6100
7000
7150
7600
8600
9100 10000 10700 11500 12000 13050 14700
26
1250 1750 2300 2900 3600 4400 4800 5100
6100
6700
7800
8400
8900 10000 10900 11075 12050 13000 14000 15000 15900
28
1400 1975 2550 3150 3950 4600 5500 6000
7000
7800
8400
9150 10000 10700 11900 13000 13800 14900 15200 16500 17500
30
1500 2100 2700 3425 4200 4950 5700 6350
7150
8400
9150 10000 11000 11800 12400 13800 14200 15000 16000 17400 18500
32
1600 2175 2850 3625 4425 5100 6000 6800
7600
8900 10000 11000 11250 12700 13900 14900 15200 16900 17300 19000 20500
34
1725 2400 3100 3825 4650 5600 6600 7200
8600 10000 10700 11800 12700 14100 15000 16500 17200 18100 19200 20500 21900
36
1825 2600 3400 4200 5100 6000 7100 7800
9100 10900 11900 12400 13900 15000 16100 17400 18500 20000 21500 22900 24200
38
2000 2775 3600 4600 5600 6500 7900 8600 10000 11075 13000 13800 14900 16500 17400 17800 20000 21900 22600 24000 25100
40
2100 2900 3800 4800 5780 7000 8025 9000 10700 12050 13800 14200 15200 17200 18500 20000 21000 22200 24900 25000 27000
42
2200 3000 3975 5000 6025 7150 8500 9600 11500 13000 14900 15000 16900 18100 20000 21900 22200 22800 25100 26900 30000
44
2275 3200 4200 5300 6500 7600 9000 10000 12000 14000 15200 16000 17300 19200 21500 22600 24900 25100 26500 30000 32000
46
2400 3400 4450 5750 7000 8100 9600 11500 13050 15000 16500 17400 19000 20500 22900 24000 25000 26900 30000 30500 32800
48
2525 3600 5775 6000 7400 8600 1075 12500 14700 15900 17500 18500 20500 21900 24200 25100 27000 30000 32000 32800 35600
* These air quantities were derived from duct sizing chart .1" friction loss per 100' of duct. All CF
.
e
t
a
m
i
x
o
r
p
p
a
e
r
a
d
e
t
s
il
s
M
For accurate selection use duct sizing table or
H
EI
G
H
T I
N
INCH
ES
Zonex Systems rectangular heavy duty dampers are recommended for systems 5 tons
or larger with a maximum differential static psure of 1.75”. These are power open /
power closed dampers made of 20 gauge “snaplock” steel frame with S & Drive duct
connections. Allow a 16” gap in the duct for the damper. A full stall motor, drawing 2 VA,
drives the motor from full open to full close in 90 seconds.
