91¹ú²ú͵ÅÄ

Backdraft damper for roof exhaust fans; horizontal mount with vertical upward airflow. Flangeless design opens with pressure (spring-assisted) and closes by gravity; optional motorpack available.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Backdraft damper for roof exhaust fans; horizontal mount with vertical upward airflow. Discharge flange included; opens with pressure (spring-assisted) and closes by gravity. Optional motorpack available.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Backdraft damper for roof exhaust fans; horizontal mount with vertical upward airflow. Intake flange included; opens with pressure (spring-assisted) and closes by gravity. Optional motorpack available.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Motorized backdraft damper that opens when energized and spring-closes when de-energized. Flangeless design for horizontal or vertical mount; prevents reverse airflow in roof or sidewall supply fans.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Motorized backdraft damper that opens when energized and spring-closes when de-energized. Motor-side flange; horizontal or vertical mount. Prevents reverse airflow in roof or sidewall supply fans.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Motorized backdraft damper that opens when energized and spring-closes when de-energized. Flange opposite motor; horizontal or vertical mount. Prevents reverse airflow in roof or sidewall supply fans.

• Up to 1 in. wg
• Up to 2,500 fpm
• Up to 180°F

Backdraft damper for horizontal exhaust that prevents reverse airflow. Intake flange included; opens with pressure differential and closes by gravity. Optional motorpack available.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Backdraft damper for horizontal exhaust that prevents reverse airflow. Discharge flange included; opens with pressure differential and closes by gravity. Optional motorpack available.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Flangeless backdraft damper for horizontal exhaust that prevents reverse airflow. Opens with pressure differential and closes by gravity; optional motorpack available.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Backdraft damper that bolts to the flanged outlet of 91¹ú²ú͵ÅÄ model USF utility blowers. Optional motorpacks available.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Non-motorized backdraft damper for vertical mount with vertical airflow. Flangeless design opens with pressure differential and spring-closes.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Non-motorized backdraft damper for horizontal mount with vertical downward airflow. Flangeless design opens with pressure differential and spring-closes.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Non-motorized backdraft damper for vertical mount with horizontal airflow. Discharge flange included; opens with pressure differential and spring-closes.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Non-motorized backdraft damper for vertical mount with horizontal airflow. Intake flange included; opens with pressure differential and spring-closes.

• Up to 2 in. wg
• Up to 2,500 fpm
• Up to 180°F

Horizontally mounted aluminum backdraft damper for vertical upflow. Gravity-close blades with adjustable counterweights; flangeless for flexible install.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical upflow. Discharge flange aids attachment; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical upflow. Intake flange supports install; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Vertical aluminum backdraft damper for horizontal airflow. Flangeless design with gravity-close blades and adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Vertical aluminum backdraft damper for horizontal airflow. Discharge flange aids install; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Vertical aluminum backdraft damper for horizontal airflow. Intake flange supports install; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical downflow. Flangeless design with gravity-close blades and adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical downflow. Discharge flange secures install; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical downflow. Intake flange secures installation; gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm

Horizontal aluminum backdraft damper for vertical upflow. Gravity-close blades with adjustable counterweights.

• Aluminum construction
• Up to 10 in. wg
• Up to 3500 fpm
• Accessory for Vektor units

Horizontal-mount backdraft damper for vertical upflow. Opens with pressure differential and closes by gravity to prevent reverse airflow.

• Up to 2 in. wg
• Up to 1500 fpm
• Up to 180°F

Horizontal-mount backdraft damper for vertical upflow. Opens with positive pressure differential and closes by gravity to prevent reverse airflow.

• Up to 2 in. wg
• Up to 1500 fpm
• Up to 180°F

Vertical-mount backdraft damper for horizontal airflow. Intake flange simplifies install; opens with pressure differential and closes by gravity to prevent reverse flow.

• Up to 2 in. wg
• Up to 1500 fpm
• Up to 180°F

Vertical-mount backdraft damper for horizontal airflow. Discharge flange supports installation; opens with pressure differential and closes by gravity to prevent reverse flow.

• Up to 2 in. wg
• Up to 1500 fpm
• Up to 180°F

Vertical-mount backdraft damper for horizontal airflow. Flangeless design; opens with pressure differential and closes by gravity to prevent reverse flow.

• Up to 2 in. wg
• Up to 1500 fpm
• Up to 180°F

Flangeless backdraft damper for horizontal airflow applications that prevents reverse airflow in HVAC systems. Blades open by differential pressure and adjustable counterweights; gravity closes blades.

• Up to 10 in. wg
• Up to 3,500 fpm
• Up to 180°F

Backdraft damper for horizontal airflow that prevents reverse airflow in HVAC systems. Includes a discharge flange for easy installation; blades open with differential pressure and closes by gravity.

• Up to 10 in. wg
• Up to 3,500 fpm
• Up to 180°F

Backdraft damper for horizontal airflow that prevents reverse airflow in HVAC systems. Features an intake flange for easy duct connection; blades open with differential pressure and closes by gravity.

• Up to 10 in. wg
• Up to 3,500 fpm
• Up to 180°F

Industrial backdraft damper with flanged channel frame and counterbalanced single thickness extruded aluminum blades. Designed to prevent backflow and provide shutoff in HVAC or indutrial process systems. Standard Spark B & C construction.

• Up to 5 in. wg
• Up to 3,900 fpm
• -20°F to 180°F

Industrial backdraft damper with flanged channel frame and counterbalanced 2V blades. Designed to prevent backflow and provide shutoff in HVAC or indutrial process systems.

• Up to 8.5 in. wg
• Up to 5,150 fpm
• -20°F to 250°F (with seals)

Industrial backdraft damper with flanged channel frame and counterbalanced fabricated airfoil blades. Designed to prevent backflow and provide shutoff in HVAC or indutrial process systems.

• Up to 13.5 in. wg
• Up to 5,150 fpm
• -20°F to 250°F

Industrial backdraft damper with flanged channel frame and counterbalanced extruded aluminum airfoil blades for standard Spark B and C construction. Designed to prevent backflow and provide shutoff in HVAC or industrial process systems. Optional Spark A for enhanced protection.

• Up to 13.5 in. wg
• Up to 5,150 fpm
• -40°F to 250°F

Industrial backdraft damper with flanged channel frame and counterbalanced fabricated airfoil blades. Designed to prevent backflow and provide shutoff in high pressure and velocity HVAC or indutrial process systems.

• Up to 20 in. wg
• Up to 6,400 fpm
• -40°F to 250°F

Round backdraft damper is designed to mount horizontally for airflow down or up; or vertical for horizontal airflow. This damper is opened by air pressure differential and closed by springs.

• Galvanized frame
• Up to 3 in. wg
• Up to 2,000 fpm

Round backdraft damper is designed to mount horizontally for airflow down or up; or vertical for horizontal airflow. This damper is opened by air pressure differential and closed by springs.

• Stainless steel construction
• Up to 3 in. wg
• Up to 2,000 fpm

Round light industrial backdraft damper with flanged frame and counterbalanced blade. Designed to prevent backflow and provide shutoff HVAC applications.

• Up to 6 in. wg
• Up to 3,000 fpm
• Up to 250°F

Round industrial backdraft damper with flanged frame and counterbalanced blade. Designed to prevent backflow and provide shutoff of HVAC and industrial process systems.

• Up to 6 in. wg
• Up to 4,000 fpm
• Up to 250°F