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* Dimensions furnished approximately 1/8 in. (3mm) undersize.

D*

Model SSFSDR-511 meets the requirements for 

fire dampers, smoke dampers and combination fire 

smoke dampers established by:

National Fire Protection Association 

    NFPA Standards 80, 90A, 92A, 92B, 101 & 105

IBC International Building Codes
New York City 

(MEA listing #260-91-M)

 

SBCCI  Standard Building Codes
California State Fire Marshall
 

Listing #: 3225-0981:112 (fire) 

  Listing #: 3230-0981:113 (smoke)

Application

Model SSFSDR-511 is a combination fire smoke damper constructed 

out of 304 stainless steel with round style blades. The SSFSDR-511 

has been qualified to 3000 fpm (15.2 m/s) and 4 in. wg (1 kPa) for 

operation and dynamic closure in emergency fire smoke situations. 

Model SSFSDR-511 may be installed vertically (with blades running 

horizontal) or horizontally and is rated for airflow and leakage in 

either direction.

Ratings

UL 555 Fire Resistance Rating

 

Fire Rating:  1 1/2 Hour 

 

Dynamic Closure Rating:  Actual ratings are size dependant 

 

Maximum Velocity:  3000 fpm (15.2 m/s) 

 

Maximum Pressure:  4 in. wg (1 kPa)

UL 555S Leakage Rating

 

Leakage Class:  I 

 

Operational Rating:  Actual ratings are actuator dependant 

 

Maximum Velocity:

 

3000 fpm (15.2 m/s) 

 

Maximum Pressure:  4 in. wg (1 kPa)

 

 

 

Maximum Temperature:  350º F (177°C) —Depending on actuator

Standard Construction

 

Frame/Sleeve: 

20 ga. (1mm) 304 stainless steel integral 

 

  sleeve 

 

Blades:

  Double skin 304 stainless steel (14 ga. 

 

  [2mm] equivalent) round style blades 

 

Seals:

  Extruded silicone rubber blade seals 

 

Linkage:

  304 stainless steel - concealed in jamb 

 

Axles:

  1/2 in. (13mm) dia. 304 stainless steel 

 

Bearings:

  304 stainless steel sleeve type 

 

Fusible Link: 

UL listed 165ºF (74ºC) -not 304SS

Size Limitations

 

Minimum Size:

  6 in. (152mm) diameter 

 

Maximum Size:

  24 in. (610mm) diameter

Optional Features

• OCI (Open closed indication switches) -not 304SS
• 165º F (74°C), 212º F (100°C), and 350º F (177°C) RRL available - not 

304SS.

• TOR (remote override of 165º F (74°C) closure allows damper to 

perform smoke management functions during a fire emergency) -not 
304SS.

• Electric or pneumatic actuators to accomplish smoke management 

and system functions.

 

• One retainer plate required, additional retainer plate available.
• 14 ga. (2mm) or 16 ga. (1.5mm) sleeve available

SSFSDR-511

Combination Fire Smoke Dampers 

Round Stainless Steel Blade

UL 555S Leakage Class I

UL555 1 1/2  Hour Fire Resistance Rating

“UL CLASSIFIED (see complete marking on 

product)”

“UL CLASSIFIED to Canadian safety standards 

(see complete marking on product)”

 

Standard 555 (Listing #R13317) 

 

Standard 555S (Listing #R13447)

O 2 in.  Min.

1.00 in. Min. Typ.

Fasteners

Clamping

Screw

Nut

Retaining

Plate Assembly

Clamping Screw

Minimum Wall/Floor Opening

 = Nominal Dia. + 7/8 in. 

O 2 in.  Min.

1.00 in. Min. Typ.

Fasteners

Clamping

Screw

Nut

Retaining

Plate Assembly

Clamping Screw

Minimum Wall/Floor Opening

 = Nominal Dia. + 7/8 in. 

Installation instructions available at www.greenheck.com.

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