Model SD-25R UL class 1 - smoke damper round blade

Application

The SD-25R combination fire smoke damper employs a single round blade for point-of-origin control of fire and smoke in static and dynamic smoke management systems. This unique damper comes standard with mounting plates for interface to round or square openings in masonry, metal stud, or wood stud assemblies and is ideal for all round duct applications. The SD-25R, standard construction, is qualified to 2000 fpm (10.2 m/s) and 4 in. wg. (1.0 kPa) at 250° F (121°C). Optional construction is qualified to 3000 fpm (15.3 m/s) and 4 in.wg. (1.0 kPa) at 350°F (177°C) and may be installed in, or adjacent to vertical walls or partitions, or horizontally in, or adjacent to floors or assemblies.

Documents

Product Sheets

SD-25R

CSI Specifications

SD-25R

CAD Drawings

SD-25R-DWG
SD-25R-PDF

Installation Instructions

Operation and Maintenance
SD-25R

Accessories

Auxiliary Switch Unit
PI-50 - dual position indicator switch
RCP-1
SD-25R

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