30" x 54" Automatic Smoke Vent - Aluminum - Bilco

NB-50SV 30" x 54" Automatic Smoke Vent - Aluminum - Bilco

The NB-50SV Automatic Smoke Vent - Aluminum has anti-corrosive aluminum material and a concealed fiberglass cover that protects the building components and people inside it from the vicious smoke, heat, and gases from a fire. A reliable single-leaf smoke vent is perfect for elevator shafts, stairways, or any area that requires smaller vents.  

NB-50SV's Thermolatch positive hold/release mechanism provides reliable vent operation in the presence of fire. This smoke vent automatically releases on the melting its fusible link, a handy feature if you talk about fire protection.   

Why install the NB-50SV?           

Affordable: The NB-50SV smoke vent also provides a cost-effective solution to address your smoke vent needs for your commercial building. In addition, this product is easy to install without special tools and requires no maintenance.       

Super-Durability: The NB-50SV smoke vent is tough and long-lasting with its aluminum build. No need to worry about corrosion with its 11 gauge (2.3 mm) aluminum with a mill finish with a 1" (25 mm) concealed fiberglass insulation and certified UL 793 and UL 790 Class A fire ratings.    

Variety: If you are looking for multiple product options, you can choose from NB-50SV 's various sizes  that will surely fit your commercial building.      

Specifications:       

• Cover and frame: The cover and frame are 11-gauge (2.3 mm) aluminum with a mill finish  
• Cover: Brakeformed, hollow-metal design with 1" (25 mm) concealed fiberglass insulation, 3" (76mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.  

• Curb: 12" (305mm) in height with integral cap flashing, 1" (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2" (89mm) mounting flange with 7/16" holes (11mm) provided for securing the frame to the roof deck.  
• Gasket: An extruded EPDM rubber gasket permanently adhered to the curb.  
• Hinge: Heavy-duty pintle hinges with 3/8" (9 mm) hinge pins.  
• Latch: Positive hold/release mechanism controlled by a single UL-listed 165°F (74°C) fusible link with a different latching point for each cover. Designed to hold the covers closed against a 90 psf (438kg/m2) wind uplift force and provided with interior and exterior pull-release cables to manually open vent covers.  
• Hardware: Engineered composite compression spring tubes and steel compression springs packed in grease. All other hardware is zinc-plated/chromate sealed.  

• Operation: Compression springs enclosed in telescopic tubes open covers automatically against a ten psf (49 kg/m2) snow/wind load when released. Automatic hold-open arms lock the cover in the fully open position. The cover is supplied with a shock absorber to ensure a controlled opening rate.  
• UL Listings: UL-listed. Comply with UL 793 and UL 790 Class A (burning brand test).   

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