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We are the Market Leader in Dust Control Spare Part Supply

Non-return (back draught) Damper

Non return (back draught) shutter damper.

Available in sizes ranging from 100mm to 400mm diameter.

• Body is constructed from galvanised steel.

• Blades are made out of Aluminium.

• Easy installation in any position.

• Spring loaded blades to prevent unwanted flow of air.

Will fit directly into spiral ducting.

Need an ATEX version?

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Starting at £6.80 £5.67

Available
FREE DELIVERY over £350
 
Product Code
back-draught-damper
Data Sheet

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Product Code Diameter Stock Qty Price
BDS100 100mm 7 - 10 Working Days
£6.80 £5.67
BDS125 125mm 7 - 10 Working Days
£8.22 £6.85
BDS150 150mm 7 - 10 Working Days
£12.62 £10.52
BDS160 160mm 7 - 10 Working Days
£12.62 £10.52
BDS200 200mm 7 - 10 Working Days
£14.87 £12.39
BDS250 250mm 7 - 10 Working Days
£25.38 £21.15
BDS315 315mm 7 - 10 Working Days
£37.86 £31.55
BDS355 355mm 7 - 10 Working Days
£32.26 £26.88
BDS400 400mm 7 - 10 Working Days
£60.11 £50.09

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These simple "butterfly" type backdraught dampers have lightweight hinged blades which will only open in one direction, preventing airflow in the opposite direction. They feature a small spring to keep them in the closed position without causing significant back pressure when the fan is running.

Backdraught dampers are normally used on ducted extract systems to prevent cold outside air from being blown back into the building when the fan is turned off.

For airflow control in ventilation systems, the aluminium blades will open when blades are exposed to overpressure and will shut again when pressure falls away, thanks to a stainless steel mechanical spring.

Back draught shutters, also known as non-return dampers, are designed to permit air to flow in only one direction, making them useful for applications where a duct is only used at intervals, and needs to be shut down when not in use to prevent heat loss or backflow.

More Information
Diameter 100mm-400mm
Minimum Price Inc VAT 6.80
Minimum Price Ex VAT 5.67
Reviews
  • Delivery Information

    Standard delivery when ordering before 2.30pm with DPD and before 12:30 with DX

    Expresspaks - £8.99 | Standard from £12.48
  • Next Day - Pre 10:30am - DPD

    Next working day before 10:30am when ordering before 2.30pm available on some items

    From £21.19
  • FREE UK DELIVERY

    When you spend over £350 in one order.*T&C Apply*

    FREE
  • Lead Times & Back Orders

    Orders with a lead time can be split at checkout

    FREE

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