• 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 Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x FU 075 52 Frequency Inverter (IP20)1 x Helios VDS-7 Three Phase Transformer 5-Step1 x FRQ5-4A V2 Inverter Speed Controller1 x Frequency converter FU 075 14 - IP661 x FU 22 25 Frequency Inverter1 x Frequency converter RUCK - FU 075 201 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FRQ5-10A Inverter Speed controller1 x Inverter VFKB 451 x Elta Variable Speed Drive IP66 - 1.5KW2 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Inverter VFKB 481 x Inverter - IDDXF54-2.21 x RDS 1 Helios Transformer Controller With Motor Protection1 x RDKT40 - 4amp Transformer Speed Control -1 x FU 075 04 Frequency Inverter (IP20)1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x FU 22 04 Frequency Inverter1 x Frequency converter RUCK - FU 075 211 x Elta 10 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 2amps1 x Frequency converter RUCK - FU 075 341 x Versio Square Ceiling Diffusers - RS141 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 250mm1 x ELTA - Single Phase Transformer 10amps1 x Round ceiling diffuser 350mm1 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 4.0KW2 x Vent Axia ACM 100 inline mixed flow duct fan1 x ELTA - Three Phase Transformer 3amps1 x NKS-D swirl diffuser v-300 x 300mm1 x Electronic extractor fan speed controller - FSC 1.51 x EC6H - Reversible Group Fan Electronic Controller1 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1251 x Elta 2 Amp Electronic single phase speed controller.1 x Vent Axia ACM 150 inline mixed flow duct fan1 x PCA Diffuser - PCA-3151 x Elta 3 Amp Electronic single phase speed controller with TK1 x Circular Ceiling Diffuser - TST 1001 x ELTA - Single Phase Transformer 8amps1 x Versio Square Ceiling Diffusers - RS141 x Curved Blade Grille 600x600 (2way blow)1 x ELTA - Single Phase Transformer 16amps1 x Airvent ceiling fan controller1 x EFSC-3N- Single Phase Speed Control1 x Elta 6 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 12amps1 x Round ceiling diffuser 400mm1 x JSR 200 Painted RAL50181 x Circular Ceiling Diffuser - TST 1601 x Flakt Woods ME 1.1 speed controller 1amp - EA9011571 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011591 x ELTA - Single Phase Transformer 4amps1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x AIRVENT speed control - AIR4019611 x Flakt Woods ME 1.12 speed controller 12.0amp - EA9011613 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Remote controller FLEX - for VEKO INT3 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x EFSC-6N- Single Phase Speed Control1 x Transformer 5 Speed Controller - ATC1-10TK1 x Circular Ceiling Diffuser - TST 2002 x Helios TSW 0.3Amp Compact Transformer speed controller1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)2 x Transformer 5 Speed Controller - ATC1-4TK1 x Elta 6 Amp Electronic single phase speed controller.2 x Transformer 5 Speed Controller - ATC1-8TK2 x Helios TSW 3 Amp Transformer speed controller
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