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    Non-return (back draught) Damper

    Product Code: back-draught-damper

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    Non-return (back draught) Damper

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    Product Code
    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?

    For more information, read more.

    View Product Details Download Data Sheet

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    03456 800 696 Mon - Thurs 8:30am - 5pm
    Fri 8:30am - 4pm

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    Starting Price £6.80 £5.67

    Available Free Delivery over £350 Pay in 30 days with Learn more
    18+, T&C apply, Credit subject to status.
     

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    Scroll right for more information
    Product Code Diameter Price Availability
    BDS100 100mm
    Our Price £6.80 £5.67
    		7 - 10 Working Days
    BDS125 125mm
    Our Price £8.22 £6.85
    		7 - 10 Working Days
    BDS150 150mm
    Our Price £12.62 £10.52
    		7 - 10 Working Days
    BDS160 160mm
    Our Price £12.62 £10.52
    		7 - 10 Working Days
    BDS200 200mm
    Our Price £14.87 £12.39
    		7 - 10 Working Days
    BDS250 250mm
    Our Price £25.38 £21.15
    		7 - 10 Working Days
    BDS315 315mm
    Our Price £37.86 £31.55
    		7 - 10 Working Days
    BDS355 355mm
    Our Price £32.26 £26.88
    		7 - 10 Working Days
    BDS400 400mm
    Our Price £60.11 £50.09
    		7 - 10 Working Days
    Filter Products
    BDS100
    Diameter : 100mm
    Our Price £6.80 £5.67
    (7 - 10 Working Days)
    BDS125
    Diameter : 125mm
    Our Price £8.22 £6.85
    (7 - 10 Working Days)
    BDS150
    Diameter : 150mm
    Our Price £12.62 £10.52
    (7 - 10 Working Days)
    BDS160
    Diameter : 160mm
    Our Price £12.62 £10.52
    (7 - 10 Working Days)
    BDS200
    Diameter : 200mm
    Our Price £14.87 £12.39
    (7 - 10 Working Days)
    BDS250
    Diameter : 250mm
    Our Price £25.38 £21.15
    (7 - 10 Working Days)
    BDS315
    Diameter : 315mm
    Our Price £37.86 £31.55
    (7 - 10 Working Days)
    BDS355
    Diameter : 355mm
    Our Price £32.26 £26.88
    (7 - 10 Working Days)
    BDS400
    Diameter : 400mm
    Our Price £60.11 £50.09
    (7 - 10 Working Days)

    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.

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

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

      Expresspaks - £7.99 | Standard from £12.48

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