Dampers and Damper Hardware
PVA Back Draft Damper
Model: PVA
A spring-operated pressure-relief damper that prevents reverse airflow in circular ducts.
Product description
The PVA Back Draft Damper prevents reverse airflow in circular duct systems. It opens when excess pressure develops and closes by means of its spring mechanism as pressure falls. An internal foam seal improves airtightness and acoustic insulation. Installation in horizontal circular duct systems is recommended.
Technical specifications
| Product Type | Pressure-Relief / Back Draft Damper |
|---|---|
| Body | Galvanised Steel |
| Blades | Aluminium |
| Internal Seal | Foam Seal |
| Operating Principle | Opens under pressure and closes by spring mechanism |
| Recommended Installation | Horizontal Circular Duct Systems |
| Models | PVA 100 / PVA 125 / PVA 150 / PVA 200 |
Model and performance data
| Model | ØD (mm) | L1 (mm) | L (mm) |
|---|---|---|---|
| PVA 100 | 99 | 6 | 88 |
| PVA 125 | 124 | 19 | 88 |
| PVA 150 | 149 | 31 | 88 |
| PVA 200 | 199 | 56 | 88 |
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