WebModel MDFD: Metal-Fab Dynamic Fire Damper, 3-11/16” Wide; 1.5-hour rating; Dynamic Airflow. ... With the increased use of dynamic fire control systems, it was discovered that ordinary static type fire dampers would not always close if the HVAC system blower continued to run. If a damper does not close properly, the integrity of the fire Webfans shut down in the event of a fire alarm. Dynamic dampers are tested to close under airflow conditions where fans may remain on during a fire. Dynamic dampers are tested under minimum airflow conditions of 2000 fpm (10.2 m/s) velocity and 4’’w.g (1.0 kPa) static pressure (when damper is closed). Higher ratings may be available in
Fire Dampers (Static & Dynamic) - Price Industries
WebThis installation instruction applies to Fire Dampers and Com-bination Fire/Smoke Dampers mounted outside the plane of an UL approved fire partition. Combination Fire /Smoke Dampers are approved for use in Static or Dynamic Systems. The dampers are designed for operation in the vertical or horizontal position with blades running horizontal. … WebNov 11, 2024 · Once static fire dampers close, no air can pass through the ducts. Dynamic Fire Dampers Dynamic fire dampers also cut off airflow to a fire and protect … great eastern dark chao
CURTAIN FIRE DAMPERS - nailor.com
WebDynamic fire dampers will remain closed even if the airflow continues during the fire. D19. 1½ Hour Rated Curtain Blade Fire Damper D19X. 1½ Hour Rated Curtain Blade with Integral X-Style Sleeve Fire Damper MA19. 1½ Hour Rated Non-Motorized Airfoil Blade Fire Damper MD19. 1½ Hour Rated Non-Motorized Single Thickness Multi-Blade Fire … WebSTATIC RATED VS. DYNAMIC RATED FIRE DAMPERS: Static fire dampers were designed for use in HVAC systems that shut down (fans off) in the event of a fire alarm. … WebFire dampers are UL 555 classified with a fire resistance rating of 1½ or 3 hours. Fire dampers fall into two categories: Dynamic rated – used with HVAC systems that remain … great eastern dbs