Dampers

Model ABD is an automatic balancing damper designed to maintain a constant airflow volume in HVAC applications. The damper blade is calibrated to automatically adjust to changing pressures. The ABD is for use in both supply and exhaust applications.

Pressure: 0.2 in. wg to 2 in. wg (0.05 kPa to 0.5 kPa)
Airflow Range:25 cfm to 425 cfm (.012 cubic meter per second to .201 cubic meter per second)
Temperature: 25°F to 150°F (-4°C to 65°C)

Model ABD-FD is an automatic balancing damper with a UL 555 rated 1½ or 3 hour static fire damper. The entire assembly is UL rated and approved. The ABD is designed to maintain a constant airflow volume in a HVAC application and calibrated to automatically adjust to changing pressures. The assembly will include an ABD, flanged sleeve, curtain fire damper (FD-150 or FD-350), and optional grille. The ABD-FD can be used in both supply and exhaust applications and must be mounted vertically.
Pressure : 0.2 to 2.0 in wg (.05 kPa to 0.5 kPa)
Volume: 25 to 275 cfm (.012 cubic meter per second to .13 cubic meter per second per second)
Temperature: 25° to 150°F (-4°C to 65°C)

Model ABD-RB combines an automatic balancing damper (ABD) with the convenience of a factory-supplied register box. The ABD-RB can be configured for supply or exhaust applications and can mount in walls and ceilings. The ABD can mount on either the side or back of the register box.

Applications
Apartments and condominiums
Bathroom ventilation
Education buildings and dormitories
Hospitals and clinics
Hotels and motels
Nursing homes and assisted living

Model ABD-T is an automatic balancing damper with a square transition. This damper is designed to maintain a constant airflow volume in HVAC applications. The damper blade is calibrated to automatically adjust to changing pressures. The transition can be removed and flipped to the other side of the damper using the quick adapter plate, which is included. Model ABD-T can be used in both supply and exhaust applications.

Pressure: 0.2 in. wg to 2 in. wg (.05 kPa to .5 kPa)
Velocity: 25 cfm to 425 cfm (.012 cubic meter per second to .201 cubic meter per second)
Temperature: 25°F to 150°F (-4°C to 65°C)

The ABD-Z1 provides on-demand control to a ventilation system. The ABD-Z1 has a shut off damper with an electric actuator, automatic balancing damper (ABD), and a plenum box as one assembly. It is designed to maintain a constant airflow volume in a HVAC applications.

Building Types
Apartments and Condominiums
Education Buildings and Dormitories
Hospitals and Clinics
Hotels and motels
Nursing Homes and Assisted Living

The ABD-Z2 has an integrated automatic balancing damper (ABD) that can be toggled between two pressure independent cfm setpoints by way of an electric actuator. The low-flow setpoints maintains a constant mimum ventilation rate, while the high-flow setpoint provides boosted on-demand ventilation.

Building Types
Apartments and Condos
Education Building and Dormitories
Hospital and Clinics
Hotels and Motels
Nursing Homes and Assisted Living

The EM-40 series are horizontally mounted backdraft dampers designed to allow vertical airflow down and prevent reverse airflow up. Model EM-40 has no flange, model EM-41 has a flange on the discharge side, and model EM-42 has a flange on the intake side. All dampers in this series open by air pressure differential and close by gravity. This series includes adjustable counterbalance weights to assist closing.

Aluminum construction
Pressure: Up to 10 in. wg (2.5 kPa)
Velocity: 2500 - 3500 fpm (13 - 18 m/s)
Temperature: Up to 180°F (82°C)

The EM-10 series are horizontally mounted backdraft dampers designed to allow vertical airflow up and prevent reverse airflow down. Model EM-10 has no flange, model EM-11 has a flange on the discharge side, and model EM-12 has a flange on the intake side. All dampers in this series open by air pressure differential and close by gravity. This series includes adjustable counterbalance weights to assist opening.

Aluminum construction
Pressure: Up to 10 in. wg (2.5 kPa)
Velocity: 2500 - 3500 fpm (13 - 18 m/s)
Temperature: Up to 180°F (82°C)

The EM-30 series are vertically mounted backdraft dampers designed to allow horizontal airflow. Model EM-30 has no flange, model EM-31 has a flange on the discharge side, and model EM-32 has a flange on the intake side. All dampers in this series open by air pressure differential and close by gravity. This series includes adjustable counterbalance weights to assist opening.

Aluminum construction
Pressure: Up to 10 in. wg (2.5 kPa)
Velocity: 2500 - 3500 fpm (13 - 18 m/s)
Temperature: Up to 180°F (82°F)

Model EMV-11 horizontal mount, backdraft damper allows vertical airflow up and prevents reverse airflow down. The damper is opened by air pressure differential and closed by gravity. Standard models include adjustable counterbalance weights to assist with opening.

Aluminum construction
Pressure: Up to 10 in. wg (2.5 kPa)
Velocity: Up to 3500 fpm (18 m/s)
Temperature: Up to 180°F (82°C)
Accessory for Vektor units

The SSWDR-53 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.

304 stainless steel construction
Pressure: Up to 3 in. wg (0.7 kPa)
Velocity: Up to 2000 fpm (10.2 m/s)
Temperature: Up to 180°F (82°C)

The WDR-53 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 steel frame
Aluminum blade
Pressure: Up to 3 in. wg (0.7 kPa)
Velocity: Up to 2000 fpm (10.2 m/s)
Temperature: Up to 180°F (82°C)

The BD-100 backdraft damper mounts horizontally to allow vertical airflow up and prevent reverse airflow down. The dampers are open by air pressure differential and closed by gravity.

Pressure: Up to 2 in. wg (0.5 kPa)
Velocity: Up to 1500 fpm (7 m/s)
Temperature: Up to 180°F (82°C)
Accessory to power roof ventilators and centrifugal roof exhaust fans

The BD-300 series backdraft dampers mount vertically to allow horizontal airflow and prevent reverse airflow. Dampers in this series: BD-300 with a flange on intake, BD-320 with a flange on discharge and BD-330, which does not have a flanged frame. All dampers in this series open by air pressure differential and close by gravity.

Pressure: Up to 2 in. wg (0.5 kPa)
Velocity: Up to 1500 fpm (7 m/s)
Temperature: Up to 180°F (82°C)
Accessory to wall fans and centrifugal inline fans

The BD-90 backdraft damper mounts horizontally to allow vertical airflow up and prevent reverse airflow down. The dampers are open by air pressure differential and closed by gravity.

Pressure: Up to 2 in. wg (0.5 kPa)
Velocity: Up to 1500 fpm (7 m/s)
Temperature: Up to 180°F (82°C)
Accessory to power roof ventilators and centrifugal roof exhaust fans

The GM-30 series backdraft dampers allow horizontal airflow and prevent reverse airflow. Dampers in this series include the GM-30 (no flange), GM-31 with a flange on discharge and GM-32 with a flange on intake. Air pressure differential with assistance from adjustable counterbalance weights to minimize pressure loss opens these dampers. The dampers close by gravity.

Pressure: Up to 10 in. wg (2.5 kPa)
Velocity: Up to 2500 fpm (18 m/s)
Temperature: Up to 180°F (82°C)

The WD-100 series backdraft dampers mount horizontally to allow vertical airflow up and prevent reverse airflow. Model WD-100 has no flange, model WD-110 has a flange on the discharge side, and model WD-120 has a flange on the intake side. These dampers open using air pressure differential (assisted by springs) and close using gravity. An optional motorpack converts the dampers to motorized operation.

Pressure: 1 in. wg (0.25 kPa)
Velocity: Up to 2500 fpm (13 m/s)
Temperature: Up to 180°F (82°C)
Primary Application: Roof mounted exhaust fans

The WD-200 series backdraft dampers are motorized to open when energized and the spring return closes when de-energized. Model WD-200 has no flange, model WD-210 has a flange on the motor side and model WD-220 has a flange opposite the motor. The WD-200 series is for horizontal or vertical mounting. Electric motorpacks ship separately.

Pressure: Up to 1 in. wg (0.25 kPa)
Velocity: Up to 2500 fpm (13 m/s)
Temperature: Up to 180°F (82°C)
Primary application: Prevent undesirable reverse airflow when installed with roof or sidewall supply (intake) fans.

The WD-300 series backdraft damper prevents reverse airflow in horizontal exhaust applications. Model WD-300 has a flange on intake, model WD-320 has a flange on discharge and model WD-330 does not have a flanged frame. Dampers open using air pressure differential and close by gravity. Optional motorpack converts the damper to motorized operation.

Pressure: Up to 2 in. wg (0.5 kPa)
Velocity: Up to 2500 fpm (13 m/s)
Temperature: Up to 180°F (82°C)

The WD-340 backdraft damper bolts to the flanged outlet of Greenheck model USF utility blowers. Motorpacks are optional.

Pressure: Up to 2 in. wg (0.5 kPa)
Velocity: Up to 2500 fpm (13 m/s)
Temperature: Up to 180°F (82°C)