Model SMD-203
Smoke Dampers
Steel 3V Blades
UL 555S Leakage Class III
Application
Model SMD-203 is a leakage rated smoke damper with 3V style
blades. The SMD-203 has been qualified to 2,000 fpm (10.2 m/s) and
4 in. wg (1 kPa) for operational closure in emergency smoke control
situations. Model SMD-203 may be installed vertically (with blades
running horizontally) or horizontally and is rated for airflow and leakage
in either direction.
Model SMD-203 meets the requirements for smoke
dampers established by:
National Fire Protection Association
NFPA Standards 92A, 92B, 101 & 105
IBC International Building Codes
New York City (MEA listing #260-91-M)
CSFM California State Fire Marshal
Leakage (Smoke) Damper Listing (#3230-0981:104)
Ratings
Leakage:
Pressure:
UL 555S leakage class III
4 in. wg (1 kPa) - differential pressure
Consult factory for sizes available in
6 in. wg (1.5 kPa)
Velocity:
Operational rated to 2000 fpm
(10.2 m/s). Rating is for airflow in
either direction through damper.
350°F (177°C) depending on the
actuator
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555S (Listing #R13317)
Temperature:
Standard Construction
Greenheck Fan Corporation certifies that the
model SMD-203 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 511 and comply with
the requirements of the AMCA Certified Ratings
Programs. The AMCA Certified Ratings Seal
applies to air performance ratings only.
Frame:
5 in. x 1 in. (127mm x 25mm)
galvanized steel hat channel with
reinforced corners. A low profile
head and sill are used on sizes less
than 17 in. 432mm) high to maximize
free area and performance.
R
Blades:
16 ga. (1.5mm) galvanized steel,
reinforced with 3 longitudinal
structurally designed vee’s.
Flexible stainless steel jamb seals.
Concealed in jamb.
Seals:
Linkage:
Axles:
1⁄2 in. (13mm) dia. plated steel
Bearings:
Bronze sleeve type
W*
Size Limitations
Minimum Size:
8 in. W x 6 in. H
(203mm W x 152mm H)
Maximum Size:
Single Section -
32 in. W x 50 in. H
(813mm W x 1270mm H)
36 in. W x 48 in. H
(914mm W x 1219mm H)
144 in. W x 100 in. H
(3658mm W x 2540mm H)
288 in. W x 50 in. H
LH
Multiple Section -
(7315 mm W x 1270mm H)
Optional Features
• Galvanized steel sleeves.
• Stainless steel bearings
H*
• OCI (Open closed indication switches)
RH
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Transitions (R, C, O)
• POC retaining angles
• Momentary Switch
• Smoke detectors
* W&H dimensions furnished approximately 1/4 in. (6mm) undersize.
Add sleeve thickness for overall sleeved damper dimension)
Right hand drive is shown. Left hand drive is available upon request.
• Sealed transition and sleeves
• Fail open
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AMCA 5.2 Pressure Drop
SMD-203
5D
Figure 5.2
ꢀ
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
500
1000
1500
2000
2500
3000
3500
0.04
0.14
0.31
0.55
0.86
1.24
1.69
500
1000
1500
2000
2500
3000
3500
0.02
0.07
0.16
0.29
0.45
0.65
0.89
500
0.01
0.04
0.09
0.16
0.25
0.36
0.49
500
0.01
0.06
0.13
0.23
0.36
0.52
0.70
500
0.03
0.10
0.23
0.41
0.63
0.91
1.24
1000
1500
2000
2500
3000
3500
1000
1500
2000
2500
3000
3500
1000
1500
2000
2500
3000
3500
Greenheck Fan Corporation certifies that the
model SMD-203 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 511 and comply with
the requirements of the AMCA Certified Ratings
Programs. The AMCA Certified Ratings Seal
applies to air performance ratings only.
R
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AMCA 5.3 Pressure Drop
SMD-203
5D
6D
Figure 5.3
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
Velocity (fpm)
(in. wg)
500
1000
1500
2000
2500
3000
3500
0.02
0.09
0.20
0.36
0.56
0.81
1.10
500
1000
1500
2000
2500
3000
3500
0.01
0.04
0.09
0.16
0.25
0.35
0.48
500
1000
1500
2000
2500
3000
3500
0.01
0.03
0.06
0.11
0.17
0.24
0.33
500
1000
1500
2000
2500
3000
3500
0.01
0.04
0.10
0.17
0.27
0.39
0.53
500
1000
1500
2000
2500
3000
3500
0.02
0.07
0.16
0.29
0.45
0.64
0.88
Greenheck Fan Corporation certifies that the
model SMD-203 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 511 and comply with
the requirements of the AMCA Certified Ratings
Programs. The AMCA Certified Ratings Seal
applies to air performance ratings only.
R
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AMCA 5.5 Pressure Drop
SMD-203
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Pressure Drop
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
Velocity (fpm)
500
1000
1500
2000
2500
3000
3500
0.04
0.17
0.38
0.67
1.04
1.50
2.05
500
1000
1500
2000
2500
3000
3500
0.06
0.22
0.50
0.89
1.39
2.00
2.72
500
1000
1500
2000
2500
3000
3500
0.03
0.14
0.31
0.54
0.85
1.22
1.66
500
1000
1500
2000
2500
3000
3500
0.03
0.12
0.26
0.46
0.73
1.05
1.42
500
1000
1500
2000
2500
3000
3500
0.03
0.13
0.30
0.53
0.83
1.19
1.62
Greenheck Fan Corporation certifies that the
model SMD-203 shown herein is licensed to bear
the AMCA Seal. The ratings shown are based on
tests and procedures performed in accordance
with AMCA Publication 511 and comply with
the requirements of the AMCA Certified Ratings
Programs. The AMCA Certified Ratings Seal
applies to air performance ratings only.
R
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Application Data
Damper Sleeve Dimensional Data
The drawings below and corresponding table show the position of the SMD-203 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.
11/2 in.
max.
"A" Dimension
in. (mm)
Standard
7 3/16 in. (183)
12 (305)
Maximum
12 (305)
12 (305)
All Dampers*
33/4
in.
When Height is
11 in. (279) or less
with OCI
6 in.
RH
Varies
*With the exception of dampers 10 in. high (254mm) or less.
53/8 in.
NOTE: Entire damper frame is not required to be installed
within the wall.
LH
Right hand drive is shown
Left hand drive available upon request
A
5 in.
Sleeve Length
Actuators and Accessories Space
T*
S
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.
B*
Actuator
Type/Model
B*
T*
S
With OCI
With OCI
120 Volt AC
5 1/4 in. (133mm) 3/4 in. (19mm)
ML4XXX Series Honeywell
MS4XXX Series Honeywell
MS4120 Series Honeywell
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
3/8 in. (10mm)
3/8 in. (10mm)
24 Volt AC
5 1/4 in. (133mm) 3/4 in. (19mm)
ML8XXX Series Honeywell
MS8XXX Series Honeywell
MS8120 Series Honeywell
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
6 in. (152mm)
3/8 in. (10mm)
3/8 in. (10mm)
Pneumatic (psi)
331-4551 Siemens
331-2976 Siemens
MK2-7121 Invensys
1 in. (25mm)
6 1/4 in. (159mm)
6 1/2 in. (165mm)
2 3/8 in. (60mm)
3 3/4 in. (95mm)
12 1/8 in. (308mm) 9 1/4 in. (235mm)
16 1/2 in. (419mm) 10 in. (254mm)
* For dampers 18 in. (457mm) or more in height these dimensions are 0 in. .
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Damper Sizing Information
Dampers larger than maximum single section size are supplied as a factory assembly of two or more sections of equal size.
The following figures show maximum damper section size and assembly configurations for multi-section dampers.
Double Section
Single Section
50 in.
(1270mm)
(
50 in.
(1270mm)
32 in. (813mm)
64 in. (1626mm)
32 in. (813mm)
When a fire/smoke damper is being used in conjunction with round or oval ductwork, the
SMD-203 can be supplied in a factory sleeve with round or oval transitions on both ends
of the sleeve. Dampers should be ordered to the duct dimensions. Drawings below show
overall damper size.
Transitioned Damper
Dimensions
D*+
2 in. (51mm) +T
s
W*+ 2 in. (51mm)+T
s
W*+ 2 in. (51mm)+T
s
D*+ 2 in. (51mm)+T
s
H*+ 2 in. (51mm)+T
H*+ 2 in. (51mm)+T
s
s
H*
H*
21/8in.
21/8in.
(54mm)
21/8in.
(54mm)
(54mm)
*
W
W*
D*
16 in. (406mm)
Min.
16 in. (406mm)
Min.
16 in. (406mm)
Min.
TYPE R
TYPE O
TYPE C
These dimensions are furnished approximately 1/4 in. (6mm) undersize, except round and oval dimensions which are approximately 1/8 in. (3mm) undersize.
*
T
= (2)(Sleeve Thickness)
s
Specifications
Smoke Dampers meeting the following specifications shall be fur-
nished and installed where shown on plans and/or as described in
schedules. Dampers shall meet the requirements of NFPA 92A, 92B,
101 & 105 and further shall be tested, rated and labeled in accor-
dance with the latest edition of UL Standards 555S. Dampers shall
have a low leakage design qualified to UL555S Leakage Class III.
Jamb seals shall be stainless steel compression type. Blades shall be
completely symmetrical relative to their axle pivot point, presenting
identical resistance to airflow in either direction or pressure on either
side of the damper.
The Damper Manufacturer's submittal data shall certify all air perfor-
mance pressure drop data is licensed in accordance with the AMCA
Certified Ratings Program for Test Figures 5.2, 5.3, and 5.5. Damper
air performance data shall be developed in accordance with the lat-
est edition of AMCA Standard 500-D. Dampers shall be labeled with
the AMCA Air Performance Seal.
Each damper/actuator combination shall have a UL555S elevated
temperature rating of 250°F (121°C) minimum and shall be opera-
tional at maximum design air flow at its installed location. Each
damper shall be supplied with an appropriate actuator installed by
the damper manufacturer at the time of damper fabrication. Damper
actuator shall be (specifier select one of the following) electric type
for 120 (24 or 230) Volt operation or pneumatic type for 25 psi mini-
mum (30 psi maximum) operation.
Damper must be rated for mounting vertically (with blades running
horizontal) or horizontally and be UL 555S rated for leakage and
airflow in either direction through the damper.
The basis of design is Greenheck Model SMD-203.
Damper blades shall be 16 ga. (1.5mm) galvanized steel 3V type with
three longitudinal grooves for reinforcement. Damper frame shall
be galvanized steel formed into a structural hat channel shape with
reinforced corners. Bearings shall be sintered bronze sleeve type
rotating in extruded holes in the damper frame. Blade edge seals
shall be silicone rubber designed to inflate and provide a tighter seal
against leakage as pressure on either side of the damper increases.
Copyright ©2006 Greenheck Fan Corporation
SMD-203 Rev 4 June 2006
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