RVS500 – Automatic Backdraught Shutter – Spring Closing – Helios
Backdraught damper for connecting to circular flanged fans to circular ducting.
The backdraught shutter opens when the fan is running and closes when the fan is off – preventing a backdraught .
The damper blades are spring assisted for easier operation.
The connecting flange matches the diameter and hole drilling on circular flanged fans.
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