We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

Dayton 29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia - Universal-Mount Backdraft Dampers
DaytonUniversal-Mount Backdraft Dampers

Dayton 29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia

The Dayton is a universal-mount backdraft damper designed for a 30-inch fan and 30-inch nominal duct diameter. It features a single-panel flat blade construction with aluminum material, supporting horizontal airflow…

SKU 3G-OTH-74585

Brand
Dayton
Item
29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia
Category
Universal-Mount Backdraft Dampers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Dayton
Type
For 30 in Nominal Duct Dia, Single Panel
Blade Type
Flat Blade
Airflow Direction
Horizontal
Mounting Position
Vertical
Maximum Air Velocity
2000 fpm

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Dayton Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dayton is a universal-mount backdraft damper designed for a 30-inch fan and 30-inch nominal duct diameter. It features a single-panel flat blade construction with aluminum material, supporting horizontal airflow and vertical mounting. The damper has a maximum air velocity of 2000 fpm.

Frequently Asked Questions

What is the Dayton backdraft damper used for?

The Dayton backdraft damper prevents reverse airflow in exhaust or ventilation systems. It is designed for a 30-inch fan and 30-inch nominal duct diameter, with horizontal airflow and vertical mounting. Common applications include commercial kitchens, industrial exhaust, and HVAC systems where one-way airflow is critical.

What are the specifications of the Dayton backdraft damper?

The Dayton is a universal-mount backdraft damper with a single-panel flat blade made of aluminum. It supports horizontal airflow, vertical mounting, and a maximum air velocity of 2000 fpm. The damper fits a 30-inch fan and 30-inch nominal duct diameter. The manufacturer part number is .

Where to buy the Dayton backdraft damper worldwide?

3G Electric supplies the Dayton backdraft damper worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source and deliver this Dayton damper to any country.

How to install the Dayton backdraft damper?

Install the Dayton damper in a vertical position within a 30-inch duct, ensuring airflow direction is horizontal. Mount the damper securely using the universal-mount frame, and verify the flat blades open freely with airflow. Follow standard HVAC practices for duct sealing and support. Always consult local codes.

Used in

Common applications for Dayton
HVAC ventilation — DAYTON centrifugal upblast roof exhaust fans (SKU 7M7U3) for kitchen exhaust systems
Mechanical power transmission — DAYTON HTD timing pulleys (SKU 404GV0) for conveyor belt drives
Process water handling — DAYTON self-priming centrifugal pumps (SKU 2ZXT4) for dewatering or transfer
Roofing and building services — DAYTON fixed ventilated roof curbs (SKU 4HX59) for filtered supply fan installations
Material handling — DAYTON latch assemblies (SKU 2KEN4) for electric chain hoist hook safety
Industrial air movement — DAYTON downblast roof exhaust fans (SKU 3HFL9) for clean air exhaust in manufacturing plants

Dayton Products

3G Electric supplies Dayton universal-mount backdraft dampers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
35.75"H-W 4.5"L Aluminum Backdraft Dampr: For 36 in Fan, For 36 in Nominal Duct Dia, Single Panel
Dayton
35.75"H-W 4.5"L Aluminum Backdraft Dampr: For 36 in Fan, For 36 in Nominal Duct Dia, Single Panel
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia, Single Panel
Dayton
27.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 28 in Fan, For 28 in Nominal Duct Dia, Single Panel
15.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 16 in Fan, For 16 in Nominal Duct Dia, Single Panel
Dayton
15.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 16 in Fan, For 16 in Nominal Duct Dia, Single Panel
32.75"H-W Alu Universal Backdraft Dampr: For 30 in Fan, Single Panel, 32 3/4 in H, 32 3/4 in W, Felt
Dayton
32.75"H-W Alu Universal Backdraft Dampr: For 30 in Fan, Single Panel, 32 3/4 in H, 32 3/4 in W, Felt
Manual Damper: For 36 in Fan, Single Panel, 35 in W, 1 5/8 in D, Aluminum, Front Flange, Horizontal
Dayton
Manual Damper: For 36 in Fan, Single Panel, 35 in W, 1 5/8 in D, Aluminum, Front Flange, Horizontal
49.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 50 in Nominal Duct Dia, Double Panel
Dayton
49.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 50 in Nominal Duct Dia, Double Panel

More from Dayton

View all Dayton parts
7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia, Single Panel
Dayton
7.75"H-W 4.5"L Aluminum Backdraft Damper: For 8 in Fan, For 8 in Nominal Duct Dia, Single Panel
33.75"H-W 4.5"L Aluminum Backdraft Dampr: For 34 in Fan, For 34 in Nominal Duct Dia, Single Panel
Dayton
33.75"H-W 4.5"L Aluminum Backdraft Dampr: For 34 in Fan, For 34 in Nominal Duct Dia, Single Panel
19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia, Single Panel
Dayton
19.8"H-W 4.5"L Alu Spring Bkdrft Dampr: For 20 in Fan, For 20 in Nominal Duct Dia, Single Panel
44.75"H-W Alu Universal Backdraft Dampr: For 42 in Fan, Single Panel, 44 3/4 in H, 44 3/4 in W, Felt
Dayton
44.75"H-W Alu Universal Backdraft Dampr: For 42 in Fan, Single Panel, 44 3/4 in H, 44 3/4 in W, Felt
47.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 48 in Nominal Duct Dia, Single Panel
Dayton
47.75"H-W 4.5"L Aluminum Backdraft Dampr: For 48 in Fan, For 48 in Nominal Duct Dia, Single Panel
41.75"H-W 4.5"L Aluminum Backdraft Dampr: For 42 in Fan, For 42 in Nominal Duct Dia, Single Panel
Dayton
41.75"H-W 4.5"L Aluminum Backdraft Dampr: For 42 in Fan, For 42 in Nominal Duct Dia, Single Panel
23.75"H-W 4.5"L Alu Univ Backdraft Dampr: For 24 in Fan, For 24 in Nominal Duct Dia, Single Panel
Dayton
23.75"H-W 4.5"L Alu Univ Backdraft Dampr: For 24 in Fan, For 24 in Nominal Duct Dia, Single Panel
39.75"H-W 4.5"L Aluminum Backdraft Dampr: For 40 in Fan, For 40 in Nominal Duct Dia, Single Panel
Dayton
39.75"H-W 4.5"L Aluminum Backdraft Dampr: For 40 in Fan, For 40 in Nominal Duct Dia, Single Panel