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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Draft Damper Type Draft Damper Type |
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About Duct Connections
More
Incremental and Proportional HVAC Damper Actuators
Actuators automatically switch between incremental and proportional control to adjust dampers to regulate airflow. Actuators attach to the damper shaft to rotate it open and closed when signaled by a controller (not included).
For Max. Damper Shaft | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-lbs. | Voltage | Current, A | Electrical Connection Type | Dia. | Ht. | Wd. | Material | Direction of Operation | Rotation Range | Ht. | Wd. | Dp. | Each | |
Without Spring Return | ||||||||||||||
| 90 | 24V AC/24V DC | 0.02 | Hardwire | 1 1/16" | 3/4" | 3/4" | Plastic | Clockwise, Counterclockwise | 35°-95° | 6 5/8" | 3 1/4" | 2 1/2" | 0000000 | 0000000 |
| 180 | 24V AC/24V DC | 0.02 | Hardwire | 1 1/16" | 3/4" | 3/4" | Plastic | Clockwise, Counterclockwise | 35°-95° | 7 7/8" | 4" | 2 5/8" | 0000000 | 000000 |
| 310 | 24V AC/24V DC | 0.02 | Hardwire | 1 1/16" | 3/4" | 3/4" | Plastic | Clockwise, Counterclockwise | 35°-95° | 7 7/8" | 4" | 2 5/8" | 0000000 | 000000 |
Incremental HVAC Damper Actuators
When duct airflow varies from the setpoint, these actuators open and close until the system requirement is restored. Use to automatically adjust dampers to regulate airflow. Actuators attach to the damper shaft to rotate it open and closed when signaled by a controller (not included).
Actuator with spring return can be set to return the damper to an open or closed position if the power fails. Use the crank for precise adjustments.
For Max. Damper Shaft | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-lbs. | Voltage | Current, A | Electrical Connection Type | Dia. | Ht. | Wd. | Material | Direction of Operation | Rotation Range | Ht. | Wd. | Dp. | Each | |
Without Spring Return | ||||||||||||||
| 35 | 24V AC | 0.1 | Hardwire | 1/2" | 3/8" | 3/8" | Plastic | Clockwise, Counterclockwise | 0°-90° | 5 1/8" | 2 3/4" | 2 1/4" | 0000000 | 0000000 |
With Spring Return | ||||||||||||||
| 177 | 24V AC/24V DC | 0.7 | Hardwire | 3/4" | 1/2" | 1/2" | Aluminum | Clockwise, Counterclockwise | 30°-90° | 10 3/8" | 4" | 3 1/4" | 0000000 | 000000 |
Proportional HVAC Damper Actuators
This actuator provides better control than incremental actuators because it is constantly being positioned in response to duct airflow requirements. Use to automatically adjust dampers to regulate airflow. It attaches to the damper shaft to rotate it open and closed when signaled by a controller (not included). Actuator can be set to return the damper to an open or closed position if the power fails. Use the crank for precise adjustments.
For Max. Damper Shaft | Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Torque, in.-lbs. | Voltage | Current, A | Control Signal | Electrical Connection Type | Dia. | Ht. | Wd. | Material | Direction of Operation | Rotation Range | Ht. | Wd. | Dp. | Each | |
With Spring Return | |||||||||||||||
| 177 | 24V AC/24V DC | 0.7 | 0-10V DC/0-20mA | Hardwire | 3/4" | 1/2" | 1/2" | Aluminum | Clockwise, Counterclockwise | 30°-90° | 10 3/8" | 4" | 3 1/4" | 0000000 | 0000000 |
Air-Pressure-Actuated HVAC Switches
Often used to detect clogged air filters and iced air conditioner coils, these switches sense small changes in pressure between two points in your duct.
| Setpoint, in. of H2O | Accuracy, in. of H2O | Temperature Range, °F | Current | Electrical Connection Type | Switch Type | Max. Pressure, psi | Low Pressure Side Connection | High Pressure Side Inside Connection | High Pressure Side Outside Connection | Each | |
Diaphragm Sensor | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.05-5 | 0.025 | -40° to 165° | 2.9 A @ 240 V AC 5.8 A @ 120 V AC | Hardwire | SPDT | 1 | 1/8 NPT Female | 1/8 NPT Female | 1/2 NPSM | 000000 | 0000000 |
| 0.05-5 | 0.04 | -40° to 165° | 4.9 A @ 240 V AC 9.8 A @ 120 V AC | Hardwire | SPDT | 1 | 1/8 NPT Female | 1/8 NPT Female | 1/2 NPSM | 000000 | 000000 |
Airflow-Actuated HVAC Switches
Use this switch to sense changes in airflow velocity in duct. The paddle extends into the duct and actuates the switch when airflow reaches the setpoint. Switch is rated NEMA 3R for protection from dirt, falling liquids, and light splashing.
Paddle | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Setpoint, fpm | Temperature Range, °F | Current | Electrical Connection Type | Switch Type | For Conduit Trade Size | Knockout Dia. | Material | Ht. | Wd. | For Use Outdoors | Environmental Rating | Specifications Met | Each | |
Paddle Sensor | ||||||||||||||
| 350-500 | 32° to 104° | 10 A @ 240 V AC 16 A @ 120 V AC | Screw Terminal | SPDT | 1/2 | 7/8" | Stainless Steel | 6 7/8" | 3 1/8" | Yes | IP43, NEMA 3R | UL Listed, C-UL Listed, CE Marked | 0000000 | 0000000 |
Fire-Rated Airflow Dampers
In the event of a fire, these dampers automatically stop airflow through duct. They have a fusible link that melts at 165° F, releasing a spring and causing the blades to close. Dampers meet UL 555 fire safety standards to help prevent the spread of fire for 1 ½ hours. They are undersized to fit inside duct.
For technical drawings and 3-D models, click on a part number.
Overall | Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | OD | Gender | Ht. | Wd. | Gauge | Connection Type | Each | |
| 4 | 3 3/4" | Male | 6 3/4" | 6 3/4" | 22 | Press Fit | 00000000 | 0000000 |
| 6 | 5 3/4" | Male | 8 3/4" | 8 3/4" | 22 | Press Fit | 00000000 | 000000 |
| 8 | 7 3/4" | Male | 10 3/4" | 10 3/4" | 22 | Press Fit | 00000000 | 000000 |
| 10 | 9 3/4" | Male | 12 3/4" | 12 3/4" | 22 | Press Fit | 00000000 | 000000 |
| 12 | 11 3/4" | Male | 14 3/4" | 14 3/4" | 22 | Press Fit | 00000000 | 000000 |
For Duct | Overall | Galvanized Steel | ||||||
|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Ht. | Wd. | Dp. | Gauge | Connection Type | Each | |
| 8" | 8" | 7 3/4" | 7 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
| 12" | 12" | 11 3/4" | 11 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 00000 |
| 14" | 14" | 13 3/4" | 13 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 00000 |
| 18" | 18" | 17 3/4" | 17 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
| 24" | 24" | 23 3/4" | 23 3/4" | 4 7/8" | 22 | Press Fit | 0000000 | 000000 |
Furnace Draft Dampers
Also known as barometric dampers, these dampers improve furnace performance by automatically opening and closing to maintain a consistent airflow despite changing environmental conditions.
Single-acting dampers open inward to prevent strong drafts from pulling too much heat into the chimney vent.
Double-acting dampers open both inward and outward to relieve pressure caused by obstructions and downdrafts.
Steel | ||||||
|---|---|---|---|---|---|---|
| Draft Damper Type | For Duct Trade Size | Gauge | For System Type | Connection Type | Each | |
| Single Acting | 5, 6, 7 | 26 | Coal, Oil | Press Fit | 0000000 | 0000000 |
| Single Acting | 7, 8, 9 | 24 | Coal, Oil | Press Fit | 0000000 | 000000 |
| Double Acting | 5, 6 | 26 | Natural Gas, Propane | Press Fit | 0000000 | 000000 |
| Double Acting | 7, 8 | 26 | Natural Gas, Propane | Press Fit | 0000000 | 000000 |
| Single Acting, Double Acting | 9, 10 | 24 | Coal, Natural Gas, Oil, Propane | Press Fit | 0000000 | 000000 |
| Single Acting, Double Acting | 11, 12 | 24 | Coal, Natural Gas, Oil, Propane | Press Fit | 0000000 | 000000 |
Airflow Dampers
Regulate airflow by adjusting dampers from fully open to fully closed. Dampers are undersized to fit inside duct.
For technical drawings and 3-D models, click on a part number.
For Duct | Overall | Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Ht. | Wd. | Ht. | Wd. | Dp. | Gauge | Seal Material | Connection Type | Each | |
| 12" | 12" | 11 3/4" | 11 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 0000000 |
| 14" | 14" | 13 3/4" | 13 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
| 16" | 16" | 15 3/4" | 15 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
| 24" | 24" | 23 3/4" | 23 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
| 36" | 36" | 35 3/4" | 35 3/4" | 5 1/2" | 16 | Vinyl Plastic | Press Fit | 0000000 | 000000 |
Standard Duct and Fittings
No need for clamps or connectors—duct and fittings press-fit together. Male ends are crimped or tapered, making them slightly smaller than a female end for simple assembly.
Galvanized steel has good corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Airflow dampers control airflow through duct. Gasketed dampers are airtight.
Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | Gasket Material | End Construction | Blade Material | Each | |
Gasketed | |||||||
| 4 | 3 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 0000000 |
| 6 | 5 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 8 | 7 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 10 | 9 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
| 12 | 11 7/8" | 20 | Neoprene Rubber | Plain | Galvanized Steel | 0000000 | 000000 |
Inline Flue-Gas Exhausters
Increase airflow through exhaust duct to improve furnace performance. Create a cutout in your duct, insert the blower wheel, and mount the housing to the duct. All have an open dripproof motor enclosure for relatively clean, dry, indoor locations. They cannot be used for sidewall venting applications.
Optional safety switch (sold separately) prevents furnace from firing if exhausters fail.
| Housing Material | Mounting Fasteners Included | Each | |
| Zinc-Plated Steel | Yes | 0000000 | 0000000 |
Wall-Vent Flue-Gas Exhausters
Often used for electric-to-gas conversions and renovations, these exhausters allow gas- or oil-fired equipment to be vented through a sidewall rather than a chimney. A thermostat signal starts the exhauster and a sensor ensures proper draft prior to operation. Exhausters have an open dripproof motor enclosure for relatively clean, dry, indoor locations. Use a reducer to vent through ducts with diameters up to 2" wider than the exhauster.
A hood (sold separately) is required for the exterior of the sidewall.