Honeywell AUTOMATIC CONTROL User Manual

ENGINEERING MANUAL OF AUTOMATIC CONTROL
DAMPER SELECTION AND SIZING
459
Fig. 17. Typical (Opposed Blade) Damper Construction.
Fig. 18. Graphic Presentation of Leakage Performance.
0102030405060708090
3.0
2.0
1.0
0
STATIC PRESSURE ACROSS
DAMPER (IN. WC)
LEAKAGE IN CFM PER FT
2
OF DAMPER AREA (FT
3
/MIN)
LEAKAGE OF A SPECIFIC DAMPER DEPENDS UPON THE HEIGHT AND
WIDTH RELATIONSHIP AS WELL AS THE AREA. THE SHADED AREA
SHOWS THE RANGE OF LEAKAGE FOR A GIVEN AREA.
NOTE:
TORQUE APPLIED TO DAMPER = 5 LB-IN. PER FT
2
OF DAMPER AREA
C2391
110
100
90
80
70
60
50
40
30
20
10
0
061218 24 30 36 42 48
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
A-DIMENSION LEAKAGE SCFM B-DIMENSION LEAKAGE SCFM
A DIMENSION B DIMENSION
LEAKAGE VS DAMPER SIZE
APPLIED TORQUE 50 LB-IN.
ACTUAL TEST DATA
1 IN. WC STATIC
2 IN. WC STATIC
3 IN. WC STATIC
4
IN
. W
C
S
T
A
T
IC
5 IN. WC STATIC
6 IN. WC STATIC
TOTAL LEAKAGE =
B-DIMENSION LEAKAGE + A-DIMENSION LEAKAGE
WHERE:
A-DIMENSION = OUTSIDE DIMENSION PARALLEL TO
THE DAMPER BLADES
B-DIMENSION = OUTSIDE DIMENSION PERPENDICULAR
TO THE DAMPER BLADES
M10419
DAMPER SIZE IN INCHES
Fig. 19. Low Leakage Dampers.
LINKAGE
ARM
LINKAGE
ROD
DUAL
LINKAGE ARM
LINKAGE ARM
AXLE SCREWS
THRUST
WASHER
DRIVE
AXLE
BLADE
AXLE
TRUNION
BEARING
DAMPER BLADE
HORIZONTAL
FRAME MEMBER
M10436
AXLE BEARING
VERTICAL
FRAME MEMBER
SIDE
SEAL

Honeywell AUTOMATIC CONTROL Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL
Category	Controller
Language	English