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Coronavirus update: we remain open and will continue to dispatch and accept orders; although in light of the new guidance we will be operating with a reduced number of staff. We are also reliant on the positions of our suppliers and couriers so our service may be affected by future changes in their circumstances.

We cannot accept walk-in custom at this time. Custom manufactured grilles and louvres are not currently available due to a manufacturer shutdown.

Non-return (backdraft) Dampers with Seals

Ventilation Ducting  | Dampers & Access Doors | Non-return Dampers |  Non-return (backdraft) Dampers with Seals



Lightweight aluminium blades on a light steel spring maintain the damper in the closed position when no air is flowing, preventing wind/drafts from flowing back through the duct. These dampers feature seals and rolled edges.

100 dia Non-return Damper with Seals
DAOSL-100




8.03 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Spiral Tube - 3m Lengths (Ref: SR)
2. 100 dia 90° T Piece with Seals - 80mm Branch (Ref: TCPL100-80)
3. 100 dia 45° Y Pieces with Seals (Ref: YSVL100)
100 dia Non-return Damper with Seals

125 dia Non-return Damper with Seals
DAOSL-125




8.03 (Excluding VAT at 20%)





Quantity:


125 dia Non-return Damper with Seals

150 dia Non-return Damper with Seals
DAOSL-150




8.07 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Nuts (Ref: NUT)
2. Spiral Tube - 3m Lengths (Ref: SR)
3. Studding - 3 Metre Lengths (Ref: THRD3)
150 dia Non-return Damper with Seals

160 dia Non-return Damper with Seals
DAOSL-160




8.77 (Excluding VAT at 20%)





Quantity:


160 dia Non-return Damper with Seals

200 dia Non-return Damper with Seals
DAOSL-200




11.06 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Split Ring Supports (Ref: SPR)
2. Spiral Tube Duct 1.5m Lengths (Ref: SRH)
3. Studding - 1m Lengths (Ref: THRD1)
200 dia Non-return Damper with Seals

250 dia Non-return Damper with Seals
DAOSL-250




16.98 (Excluding VAT at 20%)





Quantity:


250 dia Non-return Damper with Seals

315 dia Non-return Damper with Seals
DAOSL-315




28.87 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Duct Flanges - Fabricated (Ref: CDF)
315 dia Non-return Damper with Seals

355 dia Non-return Damper with Seals
DAOSL-355




29.36 (Excluding VAT at 20%)





Quantity:


355 dia Non-return Damper with Seals

400 dia Non-return Damper with Seals
DAOSL-400




45.81 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. 90° Bends (Ref: B90)
2. Damper Units - Balancing (Ref: DS)
3. Double-sided Spigots on Plates (Ref: DSPG)
400 dia Non-return Damper with Seals

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