| Item No: | Nominal Size | Size (Duct Opening) | Model | Slots | Neck Size | Actual Size | Material | Outer Dimensions | Color | Airflow Direction | Bulk Pricing | Order | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2-10 | 11-20 | 21-49 | 50+ | 100+ | ||||||||||||
| 410102-1 | 10" Neck | Steel | 11-1/2" | Black | $23.29 | $22.13 | $21.66 | $21.20 | $20.97 | ||||||||
| 410102-4 | 8" Neck | Steel | 9-1/2" | Black | $18.19 | $17.29 | $16.92 | $16.56 | $16.38 | ||||||||
| 410202-2 | 8" Neck | Steel | Brown | $9.49 | $9.02 | $8.83 | $8.64 | $8.55 | |||||||||
| 410202-1 | 6" Neck | Steel | Brown | $8.19 | $7.79 | $7.62 | $7.46 | $7.38 | |||||||||
| 410102-2 | 12" Neck | Steel | 13-1/2" | Black | $28.59 | $27.17 | $26.59 | $26.02 | $25.74 | ||||||||
| 410102-3 | 6" Neck | Steel | 7-1/2" | Black | $13.69 | $13.01 | $12.74 | $12.46 | $12.33 | ||||||||
| 410202-3 | 10" Neck | Steel | Brown | $13.69 | $13.01 | $12.74 | $12.46 | $12.33 | |||||||||
Steel Butterfly Damper for Round Ceiling Air Supply Diffuser with Plastic Key-Handle
Steel butterfly dampers control the volume of air moving through round duct, installed behind a round diffuser or elsewhere in the duct run. Within the Round Ceiling Diffusers & Dampers range, AirGrilles stocks the damper in 2 colors, black and brown, in 4 neck sizes, 6, 8, 10, and 12 inches, with a plastic key-handle for manual operation. The high-quality steel blade wears a powder-coated finish and turns quietly, without the rattle a thinner damper can develop. For the round diffuser this damper pairs with, AirGrilles also carries a Steel Round Diffuser in the same family. Bulk pricing runs across 6 quantity tiers with savings up to 30%, orders of 500+ units qualify for custom production, and in-stock items ship the same day on orders placed by 11AM ET.
A Damper for Round Duct, Not a Diffuser Face
Steel butterfly dampers control airflow volume inside round duct, separate from the diffuser face that spreads the air into the room. Within the Round Ceiling Diffusers & Dampers range, the damper installs in the duct run behind a round diffuser rather than replacing it. A plastic key-handle turns the blade open or closed from outside the duct, so adjustments happen without removing the diffuser face. The steel blade holds its set position quietly, without the rattle a lighter damper can develop over time.
Pairing a Butterfly Damper with a Round Diffuser
A butterfly damper alone controls volume but does not spread air into the room, since it has no visible face. Steel Round Diffusers cover the ceiling opening, and the damper installs behind it in the same round duct run. Ordering the two separately lets a room skip the damper where volume control is not needed, or add it where balancing matters. Match the damper's neck size to the diffuser's neck size before ordering either.
Neck Sizes, Colors, Bulk and Custom Orders
Butterfly dampers are ordered by neck size, the diameter of the round duct they install into, rather than a width-by-height opening. AirGrilles stocks 4 neck sizes, 6, 8, 10, and 12 inches, in black and brown powder-coated steel. The plastic key-handle turns the blade from fully open to fully closed, and stays in place once set. Bulk pricing spans 6 quantity tiers, from 1 unit to 100+, with savings up to 30% at the higher tiers. Orders of 500+ units qualify for custom production depending on size, finish, and lead time, and in-stock items ship the same day on orders placed by 11AM ET.
Common Questions About Steel Butterfly Dampers
These answers cover the handle, sizing, pairing, and ordering questions that come up most on steel butterfly dampers.
How does a butterfly damper work?
A butterfly damper uses a single blade inside the duct that rotates open or closed with a plastic key-handle. Turning the handle partway sets a partial airflow volume, while a full turn opens or closes the duct completely. The blade holds its position quietly once set.
How do I size a butterfly damper?
Measure the round duct's diameter and match it to the closest neck size, 6, 8, 10, or 12 inches. The damper installs inside the duct itself, not over the visible ceiling opening. Confirm the duct diameter before ordering, since the damper will not seat in a mismatched size.
What diffuser pairs with a butterfly damper?
Steel Round Diffusers cover the visible ceiling opening and pair with a butterfly damper installed in the same duct run behind it. Match both to the same neck size before ordering. Buying them separately lets a room skip the damper where volume control is not needed.
What colors do steel butterfly dampers come in?
The range ships in black and brown, both finished with a powder coat baked onto the steel. Neither color needs to match the diffuser face, since the damper sits hidden inside the duct. Check the product listing for the latest color availability by neck size.
Will a butterfly damper fit a square ceiling diffuser?
No, a butterfly damper is built for round duct only and will not fit a square opening. Square Ceiling Diffusers use their own damper built into the face instead of a separate duct-mounted damper. Match the damper type to the duct shape, not just the ceiling opening.
Is there a bulk discount on butterfly dampers?
Yes, bulk pricing applies automatically across 6 quantity tiers, with savings up to 30% at the 50+ tier. Orders of 500+ units qualify for custom production depending on size, finish, and lead time. In-stock items ship the same day on orders placed by 11AM ET.
- Choosing a selection results in a full page refresh.