Fire Damper Types

The term fire damper is defined by approved document b fire safety volume 2 buildings other than dwellinghouses as a.

Fire damper types.

Fire dampers are devices designed to impede the spread of fire through walls floors and partitions. Static fire damper 3 hr ul rated. Rated static fire dampers. Type a dampers are the easiest and fastest type to install and are mostly used in low pressure part of duct systems up to 2 w c.

Fire smoke dampers are similar to fire dampers in fire resistance rating and also prevent the spread of smoke inside the ducts. Fire dampers are installed in fire walls fire barriers fire partitions and horizontal assemblies. Used when airflow or velocity in the duct is a concern. The type c fire damper is generally used where velocities are medium to high and free area is a consideration.

The dampers are designed for operation in the vertical or horizontal position with blades running horizontal. When the damper or damper assembly exceeds either 48 in width or 60 in height the retaining angles should not be less than 1 1 2 x 1 1 2 x 1 8 thick and should be attached to the sleeve using 20 1 4 x 3 4 round head stove bolts at 8 on c. 14 x 3 4 sheet metal screws at the same spacing. Compared to an type a damper the total square inches.

Click thumbnail to view image. Fire damper designing buildings wiki share your construction industry knowledge. 1 long welds or no. A fire damper closes once the temperature of the duct becomes high enough to melt the fusible link which holds it open.

Fire dampers are ul555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems designed to close upon the detection of heat. Applications where fans shut down. They work to help stop the spread of flame through your air ducts. Aire technologies 05 series 3 hr.

The dampers are to be installed square and free from twisting or racking. When a rise in temperature occurs the fire damper. Please call for price. Home fire dampers duct fire dampers static type duct fire damper.

A mechanical or intumescent device within a duct or ventilation opening that operates. This installation instruction applies to fire dampers static dynamic curtain single and multi blade types mounted in the plane of an ul approved fire partition. The stack of blades in the fire damper frame is kept out of the air stream. Type c dampers can be ordered with low pressure less than 3 w c medium high pressure from 3 w c.