About Duct Connections
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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. Aluminum is more lightweight than steel and stainless steel and 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.
Adjustable-angle elbow connectors can be used at an angle or straight.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 3 | 3" | 2 7/8" | 26 | Crimped | 00000000 | 000000 |
Straight connectors wrap around two female duct ends to join them.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | Gauge | End Construction | Each | |
| 3 | 3" | 26 | Plain | 00000000 | 000000 |
Tee connectors join or split runs of duct.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
Female × Female × Male | ||||||
| 3 | 3" | 2 7/8" | 26 | Crimped | 0000000 | 000000 |
Reducers connect duct with different diameters.
Duct Size | Galvanized Steel | ||||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | Male OD (A) | Female ID (B) | Gauge | End Construction | Each | |
| 4 | 3 | 3 7/8" | 3" | 24 | Plain | 00000000 | 000000 |
Reducers connect duct with different diameters.
Airflow dampers control airflow through duct.
Aluminum | |||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Blade Material | Each | |
Standard | |||||||
| 3 | 3" | 2 7/8" | 26 | Crimped | Aluminum | 0000000 | 000000 |
Aluminum | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Includes | End Construction | Gauge | Each | |
Exhaust Vent | ||||||
| 3 | 3" | Damper | Plain | 24 | 0000000 | 000000 |
Downdraft diverters have an internal cone that prevents drafts from extinguishing pilot lights.
Galvanized Steel | ||||||
|---|---|---|---|---|---|---|
| Duct Size | Female ID | Male OD | Gauge | End Construction | Each | |
| 3 | 3" | 2 7/8" | 26 | Crimped | 0000000 | 000000 |
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Female ID | End Construction | Gauge | Each | |
| 3 | 3" | Plain | 26 | 0000000 | 000000 |
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.
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 | |
| 3 | 3 1/16" | 22 | Rolled | 00000000 | 0000000 |
Wye connectors join or split runs of duct.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | ID | Gauge | End Construction | Each | |
| 3 | 3 1/16" | 22 | 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 | |
| 3 | 3 3/16" | 22 | Rolled | Galvanized Steel | 00000000 | 000000 |
Blast gates stop airflow when closed.
Aluminum | |||||
|---|---|---|---|---|---|
| Duct Size | ID | End Construction | Blade Material | Each | |
| 3 | 3" | Rolled | Galvanized Steel | 00000000 | 000000 |
Saddles add a branch to an existing run of duct. Cut a hole in the duct and fit the saddle over the hole.
Duct Size | Galvanized Steel | |||||
|---|---|---|---|---|---|---|
| (A) | (B) | ID | Gauge | End Construction | Each | |
| 3 | 4 | 3 1/16" | 22 | Rolled | 00000000 | 000000 |
Flow sights have a clear plastic section, so you can easily view material flow through your duct.
Galvanized Steel | |||||
|---|---|---|---|---|---|
| Duct Size | Window Material | Gauge | End Construction | Each | |
| 3 | Acrylic Plastic | 22 | Rolled | 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.
Male straight connectors are required to connect two pieces of duct.
Female straight connectors join two fittings.
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.
Flange | Mounting | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Fasteners Included | No. of Holes | Hole Dia. | Connection Type | Each | |
Steel | ||||||||||
| 3 | 3 1/16" | 1" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 00000 |
Galvanized Steel | ||||||||||
| 3 | 3 1/16" | 1" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 00000 |
304 Stainless Steel | ||||||||||
| 3 | 3 1/16" | 7/8" | 1" | 1/8" | No | 6 | 9/32" | Press Fit | 0000000 | 00000 |
Alumiunum | ||||||||||
| 3 | 3 1/16" | 1" | 1" | 9/64" | No | 6 | 9/32" | 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.
For technical drawings and 3-D models, click on a part number.
Flange | Steel | ||||||
|---|---|---|---|---|---|---|---|
| Duct Size | Female ID | Overall Dp. | Ht. | Thick. | Connection Type | Each | |
| 3 | 3 1/16" | 1" | 1" | 1/8" | Press Fit | 0000000 | 00000 |
Blast Gates
Stainless Steel
Gate Material
Control the flow of air and material through duct systems.
Aluminum is more lightweight than stainless steel and has good corrosion resistance. 304 stainless steel is more corrosion resistant than galvanized steel. 316 stainless steel has excellent corrosion resistance.
ABS plastic gates work with plastic duct and duct hose. They withstand impact and abrasion.
On gates with a locking screw, use the screw to hold the slide in position. Gates with a stay-put slide do not require a locking screw.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||
|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Wd. | Ht. | Dp. | Features | Connection Type | Each | |
316 Stainless Steel Slide | ||||||||
| 3 | 2 7/8" | 5" | 8 5/8" | 2 7/8" | Locking Screw | Press Fit | 000000 | 0000000 |
Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Wd. | Ht. | Dp. | Slide Color | Gate Color | Features | Connection Type | Each | |
ABS Plastic Slide | ||||||||||
| 3 | 2 7/8" | 4 1/2" | 8 1/8" | 3 1/16" | Black | Black | Stay-Put Slide | Press Fit | 00000000 | 00000 |
Easy-Install Blast Gates
Often added to existing systems, these gates install without disassembling duct. Also known as half gates, these blast gates control the flow of air and material through duct systems. The locking screw holds the gate’s slide in position.
304 stainless steel is more corrosion resistant than galvanized steel.
For technical drawings and 3-D models, click on a part number.
Automatic Blast Gates
More convenient than other blast gates, these automatic gates open and close in sync with dust collectors, fume exhausters, and other machines to control the flow of air and material. The double-acting air cylinder moves the gate.
For technical drawings and 3-D models, click on a part number.
Overall | Galvanized Steel Slide | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Duct Size | Male OD | Wd. | Ht. | Dp. | Voltage | Max. Pressure, psi | For Tube OD | Inlet Connection Type | Connection Type | Each | |
Galvanized Steel Gates | |||||||||||
| 3 | 2 7/8" | 6 3/8" | 14 3/4" | 5 3/4" | 120V AC | 90 | 1/4" | Push to Connect | Press Fit | 0000000 | 0000000 |
Self-Cleaning Blast Gates
Use in dust collection systems. The slide pushes through the top of the gate to clear debris. These blast gates control the flow of air and material through duct systems. The locking screw holds the gate’s slide in position.
Aluminum is lighter in weight than stainless steel and has good corrosion resistance. 304 stainless steel is more corrosion resistant than galvanized steel.
For technical drawings and 3-D models, click on a part number.