Gravity return
The blades fall closed without an electrical actuator or control command.
PRODUCT / TECHNICAL DATA Cleanroom Ductwork & AccessoriesSpecifications / Configurations / Procurement
PRODUCT GALLERYST
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Cleanroom Ductwork & Accessories
Gravity Backdraft Louver
Product specifications
Common specification options
| Brand | ST |
|---|---|
| Construction | Gravity-operated blades |
| Material | Aluminum alloy |
| Dimensions | Custom opening size and connection |
| Blade return | Gravity closure |
| Finish options | Anodized / powder-coated |
| Frame options | Flanged perimeter |
| Fixing options | Wall / duct mounting |
| Screen options | Rear protective screen |
| Size options | Custom width, height and frame depth |
Customization availableFace dimensions, frame depth, finish and installation connection can be customized.
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Gravity Backdraft Louver opens when exhaust air lifts its blades and closes under their own weight when flow stops. It gives a fan outlet a passive closure between operating periods, helping limit reverse drafts.
FEATURES AND BENEFITS
How it helps
Perimeter frame
A flanged frame provides a defined fixing edge around a wall or duct opening.
APPLICATIONS
Where it is used
Intermittent fan exhaust
Close the outlet face between fan cycles where the blade arrangement suits the airflow direction.
SELECTION GUIDANCE
Choosing the configuration
Mounting orientation
Install in the intended orientation so the blades can rise and fall freely; a gravity-return louver depends on both airflow and gravity.
PROCUREMENT / INQUIRY
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