Dayton
Dayton 20CK20 Sleeved Fire Damper Square Steel 12x12 Inch
A 12-inch square fire damper with sleeve for vertical dynamic mounting in low-pressure HVAC systems, rated 1-1/2 hours with a 165-degree fusible link and 0.643 sq. ft. free area
- 1-1/2 hour fire rating protects ductwork
- 165 °F fusible link triggers automatic closure
- 22-gauge galvanized steel resists corrosion
- UL 555 and NFPA 80, 90A, 101 compliance
- 643 sq ft free area maintains airflow
Fire Damper for 12-Inch Square Ducts
The Dayton 20CK20 is a sleeved fire damper built from 22 ga. galvanised steel. It fits nominal 12-inch by 12-inch duct openings in low-pressure HVAC systems. The square unit carries a 1-1/2 hour fire rating and meets UL 555, NFPA 80, 90A and 101, IBC, CSFM and NYC MEA standards. It is intended for vertical, dynamic mounting in commercial ventilation installations.
Fusible Link Activates at 165 Degrees F
The single specification that decides suitability is the 165-degree Fahrenheit fusible link temperature. This link releases the damper blades when duct air reaches that point, closing the opening to restrict fire spread. Buyers needing a higher or lower activation temperature, or an electric actuator instead of a thermal link, cannot use this model. The free area of 0.643 sq. ft. also fixes the airflow capacity for the given duct size.
Supplied Retaining Angle Simplifies Installation
The package includes the recommended 2TGH2 retaining angle, removing the need to source a separate mounting bracket. This angle secures the damper sleeve to the ductwork or wall opening during vertical installation. No additional accessories, controls or software are bundled. The damper depth of 3-11/16 inches and blade dimensions of 11-3/4 inches square are fixed by the sleeve design.
Highlights
- 1-1/2 hour fire rating protects ductwork
- 165 °F fusible link triggers automatic closure
- 22-gauge galvanized steel resists corrosion
- UL 555 and NFPA 80, 90A, 101 compliance
- 643 sq ft free area maintains airflow
Specifications
| Brand | DAYTON |
|---|
Questions about this item
What does the 1-1/2 hour fire rating mean once the damper is installed in a duct?
The damper meets UL 555 and NFPA standards to resist fire for one and a half hours in a vertical dynamic HVAC system.
How does the UL 555 standard limit airflow performance in practice?
UL 555 certifies the fire resistance; the free area of 0.643 sq. ft. determines the actual airflow capacity through the 12x12 inch opening.
What physical space and hardware are needed to mount this square steel damper?
It requires a 12 by 12 inch duct opening, fits an 11-3/4 inch square frame with 3-11/16 inch depth, and uses the 2TGH2 retaining angle for installation.
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