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Due to a high volume of orders there will be a 2 week delay in all custom manufactured ductwork. This includes all rectangular ductwork, grille boxes, and fabricated round fittings. This does not affect our stock items. We apologise for any inconvenience may cause.

In Duct Non-return (backdraft) Dampers

Ventilation Ducting  | Dampers & Access Doors | Non-return Dampers |  In Duct Non-return (backdraft) Dampers



In Duct Non return dampers with seals


Non-return dampers have traditionally been installed between two lengths of duct, rather like a coupler: new in duct dampers can be inserted directly, simplifying installation.

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 In Duct Non-return Damper with Seals
DAOSL-IN-100

Data sheet...


8.03 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Hose Clips (Ref: HC)
2. EDMA Monodex Hand Nibbler (Ref: MNX)
3. 100mm Male Couplers with Seals (Ref: NPL100)
100 dia In Duct Non-return Damper with Seals

125 dia In Duct Non-return Damper with Seals
DAOSL-IN-125

Data sheet...



8.03 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Spiral Tube - 3m Lengths (Ref: SR)
2. Suspension Rings with EPDM Rubber (Ref: RSUR)
3. 125 dia 90° Pressed Bends with Seals (Ref: BPL90-125)
125 dia In Duct Non-return Damper with Seals

150 dia In Duct Non-return Damper with Seals
DAOSL-IN-150

Data sheet...


8.07 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Spiral Tube - 3m Lengths (Ref: SR)
2. Suspension Rings with EPDM Rubber (Ref: RSUR)
3. Double-sided Spigots on Plates (Ref: DSPG)
150 dia In Duct Non-return Damper with Seals

160 dia In Duct Non-return Damper with Seals
DAOSL-IN-160

Data sheet...


8.77 (Excluding VAT at 20%)





Quantity:


160 dia In Duct Non-return Damper with Seals

200 dia In Duct Non-return Damper with Seals
DAOSL-IN-200

Data sheet...


11.06 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. 200mm Semi-rigid Flexible Ducting (Ref: PAK200)
2. Rectangular Duct Straight 300x100mm (Ref: RDS300-100)
3. Tecseal 100FR 380cc Cartridge (Ref: 100FR380)
200 dia In Duct Non-return Damper with Seals

250 dia In Duct Non-return Damper with Seals
DAOSL-IN-250

Data sheet...


16.98 (Excluding VAT at 20%)





Quantity:



People who bought this item also bought:
1. Spiral Tube - 3m Lengths (Ref: SR)
2. Alu 800 Aluminium Spray Paint (Ref: ALU-800)
3. 75mm Width Cold Shrink Tape Roll (Ref: ASB7075)
250 dia In Duct Non-return Damper with Seals

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