Please note that we are currently experiencing a high number of orders and that the current lead time on all products manufactured to order will be approx. 7 - 10 working days. Off the shelf products are unaffected.


Please note we are currently unable to dispatch to Northern Ireland.

Please note that due to a technical issue we are currently unable to accept Paypal payments.

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. Spiral Tube Duct 1.5m Length (Ref: SRH)
3. 315mm Diameter T Piece (Ref: TCP315)
100 dia Non-return Damper with Seals

125 dia Non-return Damper with Seals
DAOSL-125




8.03 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Fast Clamps (Ref: FC)
2. Filter Elements (Ref: FIL)
3. Suspension Rings with EPDM Rubber (Ref: RSUR)
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. Fast Clamps (Ref: FC)
2. Filter Elements (Ref: FIL)
3. Hose clips - Bundle of 10 (Ref: HC10)
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. Fast Clamps (Ref: FC)
2. Plastic Louvre Back Draft Shutter to Suit 450mm dia Fans (Ref: PER-450-W)
3. Plastic Louvre Back Draft Shutter to Suit 500mm dia Fans (Ref: PER-500-W)
200 dia Non-return Damper with Seals

250 dia Non-return Damper with Seals
DAOSL-250




16.98 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Foil Plain Flexible Ducting (Ref: AF)
2. 90° Bends (Ref: B90)
3. 200mm Diameter Reducing Y Piece (Ref: RCYP-200)
250 dia Non-return Damper with Seals

315 dia Non-return Damper with Seals
DAOSL-315




28.87 (Excluding VAT at 20%)





Quantity:


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




45.80 (Excluding VAT at 20%)





Quantity:


400 dia Non-return Damper with Seals

Your Basket

Items:
Total:

View BasketCheckout
Best Sellers

100 dia 90° Pressed Bends with Seals

100 dia 90 Pressed Bends with Seals

6.49

600mm 30x30 Cantilever Support

600mm 30x30 Cantilever Support

17.22

PU S1 Clear Extraction Hose 10m Length

PU S1 Clear Extraction Hose 10m Length

M8 Back Plate Threaded Rod Hanger

M8 Back Plate Threaded Rod Hanger

0.90

100mm dia Chrome Exhaust Valve

100mm dia Chrome Exhaust Valve

7.96