SESMDR-501
Smoke Dampers
Application
UL 555S Leakage Class I
Model SESMDR-501 is a severe environment 316SS leakage round
smoke damper with extremely low leakage. The SESMDR-501
has been qualified to 3,000 fpm (15.2m/s) and 4 in. w.g. (1 kPa) for
operational closure in emergency smoke control situations, for use
in HVAC system applications.
Model SESMDR-501 meets the requirements for
smoke dampers established by:
National Fire Protection Association
NFPA Standards 92A, 92B, 101 & 105
IBC International Building Codes
SBCCI Standard Building Codes
New York City (MEA listing #260-91-M)
Ratings
California State Fire Marshall
Leakage: Class I
Listing #: 2330-0981:113
Pressure: 4 in. wg (1 kPa) - differential pressure
Maximum Velocity: 3000 fpm (15.2 m/s)
Temperature: 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)
Standard Construction
Frame/Sleeve: 20 ga. (1mm) 316 stainless steel integral
sleeve
Blades: Double skin 316 stainless steel (14 ga. [2mm]
equivalent) round style blades
Seals: Silicone rubber
Axles: 1⁄2 in. (13mm) dia. 316 stainless steel
Bearings: 316 stainless steel
Size Limitations:
Minimum Size:
Maximum Size:
6 in. diameter (152mm)
24 in. diameter (610mm)
Optional Features:
• Electric or pneumatic actuators to accomplish smoke
management and system functions.
• Open/Close Indicator (OCI) for remote indication of blade
position- not 316SS.
D*
• 14 ga. (2mm) or 16 ga. (1.5mm) integral sleeve
*Dimension furnished approximately 1⁄8 in. (3mm) undersize.
Specifications
Damper actuators shall be (specified select one of the following)
electric type for 120 (or 24) volt operation or pneumatic type for
25 psi minimum (30 psi maximum) operation. Manufacturer’s
submittal data shall indicate actuator space requirements around
the damper.
True Round Smoke Dampers meeting the following specifications shall
be furnished and installed where shown on plans and/or as described
in schedules. Dampers shall meet the requirements of the latest
edition of NFPA 92A, 92B, 101 & 105.
Dampers shall be tested, rated and labeled in accordance with the
latest edition of UL Standards 555S. Dampers shall be UL labeled for
use in dynamic systems. The damper shall have a dynamic closure
airflow rating equal to or greater than the airflow at the damper’s
installed location and a dynamic closure pressure rating of 4 in. wg
(1 kPa).
All UL555S operational ratings and leakage ratings shall be
qualified for airflow and pressure in either direction through the
damper. UL ratings shall allow for mounting damper vertically or
horizontally.
The Damper Manufacturer’s submittal data shall certify all air
performance pressure drop data is tested 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 latest edition of AMCA Standard 500-D.
Dampers shall have a UL 555S leakage rating of Class I and a
temperature rating of 250º F (121ºC) minimum. Dampers shall have a
UL555S operational airflow rating equal to or greater than the airflow
at its installed location and an operational pressure rating of 4 in. wg
(1 kPa). Damper actuators shall be factory mounted and qualified for
use with the damper in accordance with UL555S.
Basis of design is Greenheck’s model SESMDR-501.
Copyright © 2008 Greenheck Fan Corporation
SESMDR-501 Rev. 7 June 2008
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