Space Envelopes Required for
Actuators and Accessories
Externally mounted actuators always require space
outside of the damper sideplate or sleeve. The “S” dimen
-
sion 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 clear-
ance 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 avail-
ability above or below the damper sleeve is limited, each
damper size should be individually evaluated.
Application Data
5
3
/
8
"
5"
Right hand drive is shown
Left hand drive available upon request
LH
RH
A
Sleeve Length
Varies
6"
3
3
/
4
"
11/2" max.
B*
S
T*
5
3
/
8
"
5"
Right hand drive is shown
Left hand drive available upon request
LH
RH
A
Sleeve Length
Varies
6"
3
3
/
4
"
11/2" max.
B*
S
T*
Sideplate
Sleeve
Damper Sideplate and Sleeve Dimensional Data
The drawings below illustrate the factory standard sideplate and sleeve mountings for the SMD-401. The standard "A" dimen
-
sions 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).
A
5 in.
12 in.**
6
in.
5
3
/
8
in.
5 in.
A
Sleeve Length
Varies
3
3
/
4
in.
1
1
/
2
in. max.
*With the exception of dampers 11 in. (279mm) high or less (12 in.
(305mm)high or less if width is greater than 64 in. (1625mm)) with OCI
option.
** On dampers 11 in. (279mm) high or less (12 in. (305mm)high or less if
width is greater than 64 in. (1625mm)) with OCI option, sideplate is 16 in.
(406mm)
in. (mm)
"A" Dimension
Sleeve
Sideplate
Standard
Maximum
All Dampers*
7 3/16 (183)
12 (305)
6 3/16 (157)
When height is
11 in. (279) or
less with OCI
11 3/16
(284)
12
(305)
10 3/16
(259)
* 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)
