Combination fire and smoke dampers play a key role in modern building engineering systems. They simultaneously prevent the spread of fire and isolate burning products, ensuring the safe operation of ventilation ducts even under critical loads. What makes them indispensable is that these devices are used in dynamic smoke extraction control systems and as barriers to fire and smoke inside walls and ceilings.
In the Dubai and regional markets, Beta Industrial has established a strong reputation as a manufacturer offering certified solutions with a high degree of reliability. The range includes BMFSD models (3 hours fire resistance) and BEMFSD (1½ hours), as well as modifications with round nozzles, shortened versions “-XS" and motorized vcd versions with drives of various torques.
Beta Industrial's competitive advantage lies in the combination of a robust construction made of galvanized steel, blades with 3-V profile, self-lubricating bronze bushings and stainless rack seals, which together ensures durability and tightness. Confirmed compliance with international standards UL555, UL555S, NFPA 90A and AMCA 500-D highlights these dampers as a reliable element of integrated fire protection systems.
BMFSD and BEMFSD are UL555 and UL555S certified combination dampers designed to simultaneously control fire and smoke in ventilation systems. The BMFSD model is designed for a fire resistance limit of 3 hours, while the BEMFSD provides protection for up to 1½ hours, making them versatile solutions for various facilities. The design includes 3-V blades made of 1.4 mm thick galvanized steel, bronze bushings, stainless rack seals and UL Listed silicone gaskets withstanding above 450°F, which ensures reliable sealing and resistance at high temperatures.
The built-in resettable thermoelectric device (TRD) 165°F provides an instant response to temperature rise, and the compact design and low level of air leakage according to Leakage Class 1 and 2 make BMFSD and BEMFSD reliable elements in fire barrier and smoke barrier systems.
The BMFSD and BEMFSD series feature a 1.4 mm galvanized steel frame with a hat-shaped profile for rigidity. Blades are 3-V roll-formed, supported by bronze bushes, and linked by concealed mechanisms. Stainless steel jamb seals and UL-listed silicone gaskets provide tight closure, ensuring reliable sealing under fire conditions.
Tested for dynamic applications, these fire and smoke dampers withstand 2000 FPM at 4 IWG. Fire resistance is 3 hours (BMFSD) and 1½ hours (BEMFSD), with leakage ratings at Class 1 (350°F/250°F) and Class 2 (250°F). Compliance with UL555, UL555S, NFPA 90A, and AMCA 500-D confirms durability and minimal air loss in critical scenarios.
Available in single sizes up to 36"x36" and multi-section assemblies up to 72"x72", these combination fire and smoke dampers adapt to diverse systems. Options include round spigots for circular ducts and “-XS” models without sleeves. Motorized versions feature actuators of 9Nm or 3.4Nm, while all models can integrate a 165°F resettable TRD for automatic temperature response.
Beta Industrial holds a leading position in the field of fire protection solutions, offering a comprehensive approach to the design and supply of combination fire and smoke dampers
The products are UL (R21930) certified, have successfully passed leakproofness and pressure tests, and fully comply with NFPA 90A, UL555/UL555S, and SMACNA requirements.
The use of galvanized steel, stainless seals, EPDM and silicone gaskets, as well as bronze bushings guarantees durability and efficiency even in extreme conditions.
Various modifications are available, including BMFSD, BEMFSD and compact versions of BMFSDLT, which allows you to choose the optimal solution for the specific requirements of the facility, including options with motorized drive and integration into automatic control systems.
The BMFSD model offers a fire resistance rating of 3 hours, while the BEMFSD model provides protection for 11⁄2 hours. Both are UL555 and UL555S certified and designed to control fire and smoke simultaneously in HVAC systems.
BMFSD and BEMFSD dampers are tested for dynamic conditions and perform reliably at 2000 FPM airflow and 4 IWG pressure, ensuring safety even during high-demand system operations.
They are built with 1.4 mm galvanized steel frames, 3-V roll-formed blades, bronze bushings, and stainless steel jamb seals, complemented by UL-listed silicone gaskets that withstand temperatures above 450F.
The range includes single-section dampers up to 36"x36" and multi-section units up to 72"x72". Options cover round spigots for circular ducts, “-XS” models without sleeves, and motorized versions with actuators of 9Nm or 3.4Nm.
Each unit can be equipped with a resettable thermoelectric device (TRD) set at 165F, which activates automatically when heat levels rise, ensuring fast closure and effective smoke and fire containment.