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The intake flange could be installed on the wrong face.
Use the incoming-air flange as the seating face and preserve the blade opening direction.
STJH-BACKDRAFT-DAMPER-VERTICAL-INTAKE
Backdraft Damper Vertical-Mount Intake
A gravity-operated intake damper for vertical wall or duct openings.
- The intake flange establishes a clear mounting side.
- Light blades provide passive operation for normal ventilation duty.
Introducción del producto
The intake-side flange seats against the entering-air side of the opening. Horizontal airflow lifts the aluminum blades away from their stops; the vertical installation lets them settle closed when forward flow is lost.
Características clave
- The intake flange establishes a clear mounting side.
- Light blades provide passive operation for normal ventilation duty.
Parámetros técnicos
| Installation | Vertical |
|---|---|
| Airflow Direction | Horizontal intake |
| Flange Position | Intake side |
| Frame | Galvanized steel |
| Blades | Aluminum |
| Return Mechanism | Gravity closing |
| Typical Opening Pressure | Approximately 0.009 in. w.g.; varies with size |
| Maximum Air Velocity | 1500 fpm |
| Reverse Pressure Limit | 2 in. w.g. |
| Customization | Available to match the intake opening and operating conditions. |
Applications
- Ventilation intake plenums
- Vertical branch intake openings
Solutions for Your Application
Reverse airflow occurs when the supply fan stops.
The freely pivoting blades fall onto their closing stops without a control signal.
Opciones disponibles
- Opening width and height
- Flange dimensions
Planning a Backdraft Damper Vertical-Mount Intake specification?
Envíenos sus dimensiones, condiciones de instalación, objetivos de rendimiento y acabado superficial requerido.
