Actuators and Accessories
Space Envelopes
Externally mounted actuators always require space out-
side of the damper sleeve. The “S” dimension illustrates
the clearance required for various available actuators.
On dampers less than 18 in. (457mm) high, actuators may
also require clearances above and/or below the sleeve.
“B” and “T” dimensions are
worst
case clearance require-
ments for some dampers less than 18 in. (457mm) high.
All damper sizes under 18 in. (457mm) high do not require
these worst case clearances. If space availability above
or below the damper sleeve is limited, each damper size
should be individually evaluated.
Damper Sleeve Dimensional Data
The drawings below and corresponding table show the position of the SSFSD-211 damper when mounted in a factory sleeve.
The standard mounting locations provide enough space for the mounting of actuators, controls and allow space for installa-
tion of retaining angles and duct connections.
The standard location of a damper mounted in a factory sleeve ("A" dimension) is shown below. The damper can be posi-
tioned at other locations within a range of 6 in. (152mm) to 12 in. (305mm) for the "A" dimension.
Application Data
5
3
/
8
in.
5 in.
Right hand drive is show n
Left hand drive available upon re quest
LH
RH
A
Sleeve Length
V aries
6 in.
3
3
/
4
1
1
/
2
in.
max.
B*
S
T*
in.
5
3
/
8
in.
5 in.
Right hand drive is show n
Left hand drive available upon re quest
LH
RH
A
Sleeve Length
V aries
6 in.
3
3
/
4
1
1
/
2
in.
max.
B*
S
T*
in.
*With the exception of dampers 10 in. high (254mm) or less.
NOTE: Entire damper frame is not required to be installed within the
wall. The damper blades, when closed should be contained within
the wall.
in. (mm)
"A" Dimension
Standard
Maximum
All Dampers*
7 3/16 (183)
12 (305)
When H is 11 in. (279mm) or
less with OCI, RRL, or TOR
12 (305)
12 (305)
* For dampers 18 in. (457mm) or more in height these dimensions are 0 in. .
Actuator Type/Model
B*
T*
S
With
RRL, RRL/OCI, or TOR
With
RRL, RRL/OCI, or TOR
120 Volt AC
ML-4XXX Series Honeywell
5¼ in. (133mm)
¾ in.(19mm)
6 in. (152mm)
MS-4XXX Series Honeywell
6 in. (152mm)
3/8 in. (10mm)
6 in. (152mm)
MS-4120 Series Honeywell
6 in. (152mm)
3/8 in. (10mm)
6 in. (152mm)
24 Volt AC
ML-8XXX Series Honeywell
5¼ in. (133mm)
¾ in.(19mm)
6 in. (152mm)
MS-8XXX Series Honeywell
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
MS-8120 Series Honeywell
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
Pneumatic (25 psi min.)
331-4551 Powers
1 in. (25mm)
6¼ in. (159mm)
6½ in. (165mm)
331-2976 Powers
2 3/8 in. (60mm)
12 1/8 in. (308mm)
9¼ in. (235mm)
MK2-7121 Invensys
3 3/4 in. (95mm)
16½ in. (419mm)
10 in. (254mm)
