• Model:DAOSL

DAOSL Back Draft Damper

£ 11.49 (excl. VAT)

£ 13.79 (inc. VAT)



The DAOSL back draft damper has aluminium lamellae which open during the air flow in one direction and close when the fan motor is inactive. When no air is flowing, the lamellae are maintained in a vertical position using a spring. The damper is supplied with double EPDM gasket.

Available sizes - 100m, 125mm, 150mm, 200mm, 250mm, 315mm,

Please select below..

Look good, works well, except the shaft of the lanellae cuts into the tube or pipe. Had to shorten mine to get it in. The shaft should not be longer that the seals diameter.

Rated by Trevor

Thank you for the review. The shaft length is not normally a problem because they are normally used to join two lengths of ducting and are not designed to be fully inserted, although it is interesting you have managed it! Be aware any extra friction on the shaft will affect its operation.
- Admin

Available Options

1 x Spiral Ducting 1 meter - 800mm1 x Duct Termination with Mesh - 560mm1 x Duct Termination with Mesh - 355mm1 x 220x90mm Insulated Rectangular Horizontal 45° Bend1 x 204x60mm x 1m Insulated Rectangular Duct1 x A Duct Mountable - Double Drilled Fixing Flange (PAIR) - 560mm1 x FAST-TRACK RANGE 90mm - Adaptor For Distribution Box1 x CRBB/4-355/112D PRMI 230v1 x Ancillary Pack for SLC-900 for SLC900/6A-3AC and SLC900/6B-3AC1 x Ducting 45 Degree Bend - 180mm1 x Ducting 15 Degree Bend - 180mm1 x Elta SPA560/46-3AC - IP541 x Elta SPA250/2-1AC - IP441 x Ducting 90 Degree Bend - 710mm1 x Ancillary Pack for SB-Biflow 400 model1 x Heat Resistant In-line Axial Fan - VOK 120/100 H1 x Duct Tape - High Temperature Resistance 350˚C - DTape3501 x Airbrick Grille with flange - 204 x 60mm1 x 204x60mm Equal T Piece1 x VORT-E 254 M ATEX II 2G/D h T3/125°C X Gb/Db (40320)1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 22 25 Frequency Inverter1 x FU 075 52 Frequency Inverter (IP20)1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Frequency converter FU 075 14 - IP661 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 1.5KW1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FRQ5-10A Inverter Speed controller1 x FU 15 16 Frequency Inverter1 x Elta 10 Amp Electronic single phase speed controller.1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x ELTA - Three Phase Transformer 10amps1 x ELTA - Three Phase Transformer 3amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x FU 075 04 Frequency Inverter (IP20)1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ELTA - Single Phase Transformer 2amps1 x NKS-D swirl diffuser v-300 x 300mm1 x Circular Ceiling Diffuser - TST 1251 x Electronic extractor fan speed controller - FSC 1.51 x PCA Diffuser - PCA-3151 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1001 x Circular Ceiling Diffuser - TST 2001 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 400mm1 x Curved Blade Grille 600x600 (2way blow)1 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Elta 2 Amp Electronic single phase speed controller.1 x JSR 200 Painted RAL50181 x Elta 3 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps1 x Circular Ceiling Diffuser - TST 1601 x EFSC-3N- Single Phase Speed Control1 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x Elta 3 Amp Electronic single phase speed controller.1 x Airvent ceiling fan controller1 x Balance S Diffuser - NO RING - 100mm1 x ELTA - Single Phase Transformer 12amps1 x DEF-140T Inlet Guard for the CBT-100N2 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Multi Input Run On Timer - 0 - 20min - CFCU2 x Remote controller FLEX - for VEKO INT2 x Helios TSW 7.5 Amp Transformer speed controller1 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x COM-31 x Round ceiling diffuser 300mm2 x Vent Axia ACM 150 inline mixed flow duct fan1 x EFSC-6N- Single Phase Speed Control1 x Elta 6 Amp Electronic single phase speed controller.1 x Round ceiling diffuser 250mm2 x Envirovent 4 Way Remote Control Switch - SWHBKRF-41 x Round ceiling diffuser 350mm1 x Helios TSW 0.3Amp Compact Transformer speed controller1 x PCA Diffuser - PCA-2501 x ELTA - Single Phase Transformer 10amps1 x Transformer 5 Speed Controller - ATC1-10TK1 x Transformer 5 Speed Controller - ATC1-4TK2 x Vent Axia ACM 100 inline mixed flow duct fan2 x Helios TSW MCB Amp Transformer speed controller1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan3 x Vent Axia ACM 125 inline mixed flow duct fan3 x Helios TSW 3 Amp Transformer speed controller2 x Helios TSW 1.5 Amp Transformer speed controller1 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A2 x Three Phase Transformer controllers - RMT 1.5 Amp1 x Temperature Fan Speed Controller - ATCP4-WMS
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