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Space Envelopes Required for
Actuators and Accessories
Externally mounted actuators always require space outside
of the damper sideplate or 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
sideplate or sleeve. “B” and “T” dimensions are worst case
clearance requirements 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.
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.
A
127mm.
305mm
*
152mm .
127mm
A
Sleeve Length
Varies
38mm max
95mm
3
137mm
A
127mm.
305mm
*
152mm .
127mm
A
Sleeve Length
Varies
38mm max
95mm
3
137mm
Sideplate
Sleeve
Damper Sideplate and Sleeve Dimensional Data
The drawings below illustrate the factory standard sideplate and sleeve mountings for the SSSMD-201. The standard "A"
dimensions listed in the table provide adequate space for the mounting of actuators and controls.
If space constraints are a problem the "A" dimension can be varied between 5
3
⁄8 in. (136mm) and 12 in. (305mm).
Application Data
* For dampers 18 in. (457mm) or more in height these dimensions are 0 in. .
Actuator
Type/Model
B* T* S
With OCI With OCI
120 Volt AC
ML4XXX Series Honeywell 5 1/4 in. (133mm) 3/4 in. (19mm) 6 in. (152mm)
MS4XXX Series Honeywell 6 in. (152mm) 3/8 in. (10mm) 6 in. (152mm)
MS4120 Series Honeywell 6 in. (152mm) 3/8 in. (10mm) 6 in. (152mm)
24 Volt AC
ML8XXX Series Honeywell 5 1/4 in. (133mm) 3/4 in. (19mm) 6 in. (152mm)
MS8XXX Series Honeywell 6 in. (152mm) 3/8 in. (10mm) 6 in. (152mm)
MS8120 Series Honeywell 6 in. (152mm) 3/8 in. (10mm) 6 in. (152mm)
Pneumatic (psi)
331-4551 Siemens 1 in. (25mm) 6 1/4 in. (159mm) 6 1/2 in. (165mm)
331-2976 Siemens 2 3/8 in. (60mm) 12 1/8 in. (308mm) 9 1/4 in. (235mm)
MK2-7121 Invensys 3 3/4 in. (95mm) 16 1/2 in. (419mm) 10 in. (254mm)
*With the exception of dampers 10 in. high (254mm) or less.
NOTE: Entire damper frame is not required to be installed
within the wall.
in. (mm)
"A" Dimension
Standard Maximum
All Dampers* 7 3/16 in. (183) 12 (305)
When Height is
11 in. (279) or less
with OCI
12 (305) 12 (305)