Model SMD-301 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 (#2330-0981:104)
Application
Model SMD-301 is a leakage rated smoke damper with extremely
low leakage. The SMD-301 serves the function of both a control
damper and smoke damper. High strength airfoil blades insure
lowest resistance to airflow in HVAC systems with velocities to
3000 fpm (15.2m/s) and 4 in. wg (1.0 kPa) Model SMD-301 may be
installed vertically (with blades running horizontal) or horizontally
and is rated for airflow and leakage in either direction.
UL555S Leakage Rating
Leakage Class:
I
Operational Rating
Maximum Velocity:
3000 fpm (15.2 m/s)
Maximum Pressure:
4 in. wg (1 kPa)
Maximum Temperature:
350ºF (177ºC) depending on
actuator
Standard Construction
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.
Blades:
Double skin airfoil shape of
galvanized steel with full length
structural reinforcement. 14 ga.
(2 mm) equivalent thickness.
Seals:
Extruded silicone rubber blade
seals. Flexible stainless steel jamb
seals.
Linkage:
Concealed in jamb.
Axles:
1
/
2
in. (13mm) dia. plated steel.
Bearings:
Bronze sleeve type.
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)
Multiple Section:
128 in. W x 100 in. H
(3251mm W x 2540mm H) or
256 in. W x 50 in. H
(6502mm W x 1270mm H)
Optional Features:
• Galvanized steel sleeves.
• Stainless steel bearings
• OCI (Open closed indication switches)
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Transitions (R, C, O)
• POC retaining angles
• Momentary Switch
• Smoke detectors
• Sealed transitions and sleeves
• Fail open
SMD-301
Smoke Dampers
Steel Airfoil Blades
UL 555S Leakage Class I
*W&H dimensions furnished approximately
1
/
4
in. (6mm) undersize.
Right hand drive is shown. Left hand drive is available upon request.
Damper also may be rotated 180° in the field for opposite side drive.
(Add sleeve thickness for overall sleeved damper dimension)
H*
W*
LH
RH
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555S (
Listing #R13317)
R
Greenheck Fan Corporation certifies that the
model SMD-301 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.
Installation instructions available at www.greenheck.com
