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D1250 Series Multi-Blade Dynamic Fire Dampers provide 1 1/2 hour UL labeled fire protection suitable for use where ductwork penetrates a wall or floor with a fire resistance rating of up to 2 hours. Nailor’s most popular and economical design features sturdy vee groove style blades and a rugged mitered corner hat channel frame design that virtually eliminates racking. The over-center/knee lock with high torque spring/fusible link assures fail-safe closure during fire conditions under airflow. The D1250 series is approved for use in both static and dynamic HVAC system designs, and is an economical and versatile performer, available with a factory fitted sleeve and choice of transition styles, suitable for use in the majority of today's commercial applications.

Models

D1250 - Multi-Blade Fire Damper • 1 ½ Hour • Dynamic • Vee Blade • No Sleeve
D1251 - Multi-Blade Fire Damper • 1 ½ Hour • Dynamic • Vee Blade • Type A
D1252 - Multi-Blade Fire Damper • 1 ½ Hour • Dynamic • Vee Blade • Type B
D1253 - Multi-Blade Fire Damper • 1 ½ Hour • Dynamic • Vee Blade • Type C

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Catalog