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VEE-GROOVE BLADE FIRE DAMPERS
Model Series D1250 dampers with duct heights less than 8" (203) require a Type 'B' sleeve enclosure (Model D1252).
Units less than 8" (203) in width only, or in both width and height, require a Type 'C' enclosure (Model D1253).
TYPE B SLEEVE ENCLOSURE
MODEL: D1252
ENCLOSURE
CCW
BOTH ENDS
TO
E
OPEN
DAMPER
SLEEVE
8" (203)
5" (127)
16" (406) STANDARD
Min. Duct Size:
8" x 4" (203 x 102).
(Overall damper H is 8").
Max. Duct Size:
Single Section
Vertical mount:
36" x 7 1/2" (914 x 191).
Horizontal mount:
30" x 7 1/2" (762 x 191).
Multiple Section Assembly
Vertical mount:
72" x 7 1/2" (1829 x 191).
Horizontal mount:
60" x 7 1/2" (1524 x 191).
PERFORMANCE DATA:
Previous View
E18
E18
*
D
+
2"
DUCT
(51)
STYLE CR: FOR ROUND DUCT
'B'
Min. Duct Size:
(Overall damper size is 8" x 8" [203 x 203] min.).
Max. Duct Size:
Vertical mount:
Horizontal mount:
Vertical mount:
Horizontal mount:
PRESSURE DROP (damper fully open)
1.0
.90
.80
.70
.60
.50
.40
Imperial figures shown.
To convert to SI
.30
.25
(metric) system:
.20
Multiply:
.15
CFM x .4719 = liters per
.10
second
.09
.08
.07
inches w.g. x .2486
.06
= kilopascals
.05
.04
fpm x .00508 = meters
.03
per second
cfm per sq. ft. x 5.08 =
.02
liters/second per
.015
sq. meter.
.01
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Contents
TYPE C SLEEVE ENCLOSURES
MODEL: D1253
D =
NOM.
DIA.
*
*
'C' ENCLOSURE BOTH ENDS
CCW
TO
D –
OPEN
1/8" (3)
(D –
1/4" (6)
OVER
36"
DAMPER
(914))
SLEEVE
8" (203)
5" (127)
*
16" (406) STANDARD
TYPE C SIDE VIEW
Vertical or Horizontal mount:
4" (102) diameter.
Single Section
34" (864) diameter.
28" (711) diameter.
Multiple Section Assembly
46" (1168) diameter.
38" (965) diameter.
300
400
500
600
800
1000
1500
2000
3000
4000
5000
Air Velocity in Feet Per Minute
Tested per AMCA standard 500-D, Fig. 5.3.
Dimensions
*
H
+
2"
H
(51)
*
.
or 8" (203) min
STYLE CO: FOR OVAL DUCT
*
H
+
H =
2"
NOM.
(51)
DUCT
SIZE
*
.
or 8" (203) min
STYLE CSR : FOR SQUARE
or RECTANGULAR DUCT
Min. Duct Size:
Vertical or Horizontal mount:
4" x 4" (102 x 102).
(Overall damper size is 8" x 8" [203 x 203] min.).
Max. Duct Size:
Single Section
Vertical mount:
34" x 46" (864 x 1168).
Horizontal mount:
28" x 38" (711 x 965).
Multiple Section Assembly
Vertical mount:
70" x 46" (1176 x 1168)
or 34" x 94" (864 x 2388).
Horizontal mount:
58" x 38" (1473 x 965)
or 28" x 78" (711 x 1981).
Performance
Specification
Revised September 20, 2004
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