• 30350 Ecorse Road, Romulus, MI 48174
  • 734-326-0050



CWV - Aluminum frame and blades - 8"-50" - Flanged - Wall Supply (Intake)

The Model CWV is a flanged frame vertical mount automatic backdraft damper. It is designed to allow airflow in one direction and to prevent reverse airflow. The counter balanced blades open with airflow and close by spring-assist when the fan shuts down. Recommended for vertical mount supply (intake) applications. Ideal for belt-driven centrifugal wall ventilators. Do not use with any kitchen exhaust applications.

Standard Construction:
Frame: 1-5/8" deep x 1-3/8" flanged x .062 Extruded Aluminum.
Blades: 26 gauge 3105 Aluminum with a Galvanized Steel reinforcement strip and spring assist to close.
Seals: Felt on leading edge of blades for tight closure and quiet operation.
Tie Rod: Galvanized Steel for uniform opening and closing.
Bushings: 304 Stainless Steel pivot pins, rivets, and bushings.
Construction: Staked corners.
Finish: Mill.

Sizes (see chart on Submittal Dwg. for std. sizes):
Minimum: 8" W x 8" H
Maximum: 50" W x 50" H

Performance Criteria:
2250 FPM Maximum Velocity.
1" wg Maximum Pressure.
180 degree Maximum Temperature.

Motor pack (Model MTR-611 - see submittal dwg.)
Custom sizes available in whole inch increments.
Frame and Blades - polar white finish.

We recommend mounting the damper at least 1/3 the fan diameter away from the fan blade.


Submittal Dwg.


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Backdraft Dampers

411 611 CWV


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About ACP

Family owned and operated since 1947, Air Conditioning Products Company (ACP) is a world-class manufacturer of shutters, dampers, louvers, and other products for air movement equipment.