About Duct Connections
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Quick-Disconnect Duct and Fittings
Join duct and fittings with quick-release clamps for faster disassembly and cleanout than other duct systems.
Galvanized steel has good corrosion resistance. Aluminum is lightweight and has good corrosion resistance. 304 stainless steel is the most corrosion resistant.
For technical drawings and 3-D models, click on a part number.
Duct with access panel saves you from having to cut holes or add screws for a traditional cleanout door. The built-in panel slides back and forth, giving you easy access to the inside of the duct.
Opening | Galvanized Steel | |||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | ID | Lg. | Wd. | Lg. | Gauge | End Construction | Each | |
| 20 | 19 15/16" | 58 3/4" | 7" | 14" | 20 | Rolled | 00000000 | 0000000 |
Adjustment sleeves extend your duct length. Cut duct, then slide on the sleeve. They include an O-ring for the clamp to grasp.
Wye connectors join or split runs of duct.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Each | |
| 20 | 19 15/16" | 20 | Rolled | 00000000 | 0000000 |
Wye connectors join or split runs of duct.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Each | |
| 20 | 19 7/8" | 20 | Rolled | 00000000 | 0000000 |
Adapters join quick-disconnect duct to other duct systems. Duct-to-duct with flange adapters provide a secure connection between duct. Duct flanges are also available. Duct-to-hose adapters are slightly undersized. Slide hose over the adapter and hold it in place with a hose clamp (not included).
Airflow dampers regulate airflow.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Blade Material | Each | |
| 20 | 20 1/8" | 20 | Rolled | Galvanized Steel | 00000000 | 0000000 |
Blast gates stop airflow when closed.
Aluminum | |||||
|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Blade Material | Each | |
| 20 | 20" | Rolled | Galvanized Steel | 00000000 | 0000000 |
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Sound Absorbed | Gauge | End Construction | Each | |
| 20 | 25% | 20 | Rolled | 00000000 | 000000000 |
Spark traps lower fire risk by reducing the number of sparks in a duct system.
Powder-Coated Steel | ||||
|---|---|---|---|---|
| Duct Size | Gauge | End Construction | Each | |
| 20 | 20 | Rolled | 00000000 | 000000000 |
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. 304 stainless steel is more corrosion resistant than steel and aluminum.
For technical drawings and 3-D models, click on a part number.
Connectors with welded seams prevent leaks.
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 20 | 20" | 19 7/8" | 24 | Crimped | 0000000 | 0000000 |
Straight connectors wrap around two female duct ends to join them.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | Gauge | End Construction | Each | |
| 20 | 20" | 26 | Plain | 00000000 | 000000 |
Airflow dampers control airflow through duct.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Blade Material | Each | |
Standard | ||||||
| 20 | 19 3/4" | 18 | Plain | Galvanized Steel | 00000000 | 0000000 |
Crush-Resistant Spiral Duct and Fittings
A spiral seam makes this duct strong and rigid. Fittings have male ends with a slightly smaller diameter to press-fit into duct.
Galvanized steel has good corrosion resistance. 304 stainless steel is more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Add a noise reducer to duct to decrease noise by as much as 50%.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Each | |
| 20 | 19 7/8" | 24 | Spiral | 00000000 | 0000000 |
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Male OD | Gauge | End Construction | Each | |
| 20 | 19 7/8" | 24 | Spiral | 00000000 | 0000000 |
Male straight connectors are required to connect two pieces of duct.
Female straight connectors join two fittings.
Collars create branches from a rectangular duct. Cut a hole in the duct and use a collar to attach spiral duct.
Duct Flanges
Bolt flanges to equipment to start a run of duct. They can also create secure connections between two duct ends by mounting a flange to each end and then joining the flanges.
Steel, galvanized steel, 304 stainless steel, and aluminum flanges are also known as angle rings.
Galvanized steel flanges have good corrosion resistance. Aluminum flanges have good corrosion resistance in wet environments, and weigh less than steel and stainless steel flanges. 304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.
Steel, 304 Stainless
Steel, and Aluminum
Flange | Mounting | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Fasteners Included | No. of Holes | Hole Dia. | Connection Type | Each | |
Steel | ||||||||||
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 000000 |
Galvanized Steel | ||||||||||
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 00000 |
304 Stainless Steel | ||||||||||
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 000000 |
Alumiunum | ||||||||||
| 20 | 20 1/8" | 1 1/2" | 1 1/2" | 3/16" | No | 12 | 7/16" | Press Fit | 0000000 | 00000 |
Weld-On Duct Flanges
Weld flanges to equipment to start a run of duct. They can also create secure connections between two duct ends by mounting a flange to each end and then joining the flanges. Also known as angle rings.
304 stainless steel flanges are more corrosion resistant than steel.
For technical drawings and 3-D models, click on a part number.