Greenheck SMD-301V User Manual
Model SMD-301V
Application
Model SMD-301V is a vertical blade low leakage rated smoke
damper. High strength airfoil blades insure lowest resistance to
airflow in HVAC systems with velocities to 4000 fpm (20.3m/s) and
4 in. wg (1.0 kPa).
UL555S Leakage Rating
Leakage Class: I
Operational Rating
Maximum Velocity: 2000 fpm (20.3 m/s) up to
100 in. x 32 in. H
(2540mm x 813mm) or
4000 fpm (20.3 m/s) up to
50 in. x 32 in. (1270mm x 813mm)
Maximum Pressure: 4 in. wg (1 kPa)
Maximum Temperature: 350ºF (177ºC)
Construction Standard Optional
Frame Material Galvanized Steel -
Frame Material
Thickness
Frame Type
Blade Material Galvanized Steel -
Blade Material
Thickness
Blade Type Double Skin Airfoil -
Linkage
Axle Bearings 304SS -
Axle Material Plated Steel -
Blade Seals Silicone -
Jamb Seals 304SS -
16 ga. (1.5mm) -
5 in. x 1in.
(127mm x 25mm)
hat channel
14 ga. (2mm)
Equivalent
Plated Steel Out
of Airstream,
Concealed in Jamb
-
-
-
Smoke Dampers
Steel Airfoil Blades
UL 555S Leakage Class I
Model SMD-301V 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)
“UL CLASSIFIED (see complete marking on
product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standard 555S (Listing #R13317)
W*
H*
Size Limitations
W x H
Minimum
Size
2000 fpm (10.2 m/s)
Inches 6 x 8 50 x 32 100 x 32
mm 152 x 203 1270 x 813 2540 x 813
4000 fpm (20.3 m/s)
Inches 6 x 8 50 x 32 -
mm 152 x 203 1270 x 813 -
Maximum Size
Single
Section
Multiple Section
*W&H dimensions furnished approximately 1/4 in. (6mm) undersize.
(add sleeve thickness for overall sleeved damper dimension).
Features:
• Frames are constructed with reinforced corners.
Low profile head and sill are used on sizes less than
17 in. high (432mm).
• Blades are double skin airfoil shape of galvanized
steel with full length structural reinforcement
• Actuators: 24V, 120V, 230V, Pneumatic
Installation instructions available at www.greenheck.com
5D 6D
5D
D
4 (W) (H)
3.14
5D 6D
AMCA 5.2 Pressure Drop SMD-301V
Options for SMD-301V:
• Factory mounted accessories
- Retaining angles
- Quick connect breakaway connections
- S & drive connections
- Access doors
• Greenheck test switches (GTS-3 & GTS-4)
• Momentary test switch
• POC retaining angles
• OCI (Open closed indication switches)
• Sealed transitions and sleeves
• Security bars
• Smoke detectors
• Transitions: R, C, O
Pressure Drop Data
This pressure drop testing was conducted in accordance with AMCA Standard 500-D using the three configurations shown. All
data has been corrected to represent standard air at a density of .075 lb/ft
Actual pressure drop found in any HVAC system is a combination of many factors. This pressure drop information along with an
analysis of other system influences should be used to estimate actual pressure losses for a damper installed in a given HVAC
system.
AMCA Test Figures
Figure 5.3 Illustrates a fully ducted damper. This configuration has the lowest pressure drop of the three test configurations
because entrance and exit losses are minimized by straight duct runs upstream and downstream of the damper.
Figure 5.2 Illustrates a ducted damper exhausting air into an open area. This configuration has a lower pressure drop than
Figure 5.5 because entrance losses are minimized by a straight duct run upstream of the damper.
Figure 5.5 Illustrates a plenum mounted damper. This configuration has the highest pressure drop because of extremely high
entrance and exit losses due to the sudden changes of area in the system.
3
(1.2 kg/m
3
).
5D 6D
Figure 5.3
5D
Figure 5.2
D
4 (W) (H
3.14
)
Figure 5.5
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