Beteccad MSD-GB-21C2-A-R Smoke Detection Damper (UL-555S)

The Beteccad MSD-GB-21C2-A-R is a high-performance smoke detection damper engineered to meet rigorous fire safety standards. Certified under UL-555S, this damper ensures effective smoke control during fire emergencies, protecting building occupants and critical infrastructure. It is designed for integration with modern HVAC systems, offering robust construction and reliable operation under extreme conditions.

Key Features & Specifications

• Certification: UL-555S compliant with Class II leakage rating.
• Capacity: Handles maximum air velocity of 2000 fpm and operating pressure up to 4 in. w.g (1000 Pa).
• Temperature Resistance: Rated for 250°F (121°C) for 30 minutes (Class II) and 350°F (176°C) for 30 minutes (Class III).
• Construction: Frame and blades made of 16-gauge (1.4 mm - 1.7 mm) thick galvanized steel for durability.
• Sealing: Equipped with silicon rubber blade seals and stainless steel jamb seals to ensure tight closure.
• Actuation: Compatible with Honeywell, Belimo, or Siemens actuators (24V AC, 120V AC, 230V AC).
• Safety Devices: Includes a Thermal Response Device (TRD) at 165°F (74°C) and a push button for manual reset.

This damper is ideal for commercial and industrial buildings requiring compliant smoke control solutions. The standard configuration includes a visible open/close indicator and a neck adapter for round duct connections, ensuring ease of installation and maintenance. Optional stainless steel construction (304/316L) is available for corrosive environments, though UL certification may vary for custom builds.