• 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 Ancillary Pack for SLC-4001 x 204x60mm Elbow Bend with 125mm Fixed Spigot1 x Duct Termination with Mesh - 630mm1 x CBMT/Q 400-55 1 HEATER KIT1 x Spiral Ducting 1 meter - 160mm1 x FSD-TD 400mm Fire and Smoke Damper, Type C, EASY FIX AF, GALV Case, GALV Blades, PM24-TF (SC)1 x 125mm Round Connector1 x PGK 40-20-3-2,0 Duct cooler1 x Duct Mounted Filter Box - G4 Grade Panel - 400mm1 x Flanged Spigot - 630mm1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x FRQ-10A V2 Inverter Speed controller1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 075 52 Frequency Inverter (IP20)1 x FRQ5-4A V2 Inverter Speed Controller1 x FU 22 25 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 1.5KW1 x Frequency converter RUCK - FU 075 201 x FRQ5-10A Inverter Speed controller1 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW1 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 FU 22 04 Frequency Inverter1 x Frequency converter RUCK - FU 075 211 x FU 075 04 Frequency Inverter (IP20)1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Single Phase Transformer 2amps1 x NKS-D swirl diffuser v-300 x 300mm1 x Balance S Diffuser - NO RING - 125mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Circular Ceiling Diffuser - TST 1251 x PCA Diffuser - PCA-3151 x Elta 2 Amp Electronic single phase speed controller.1 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Circular Ceiling Diffuser - TST 2001 x ELTA - Single Phase Transformer 8amps1 x Curved Blade Grille 600x600 (2way blow)2 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan2 x Multi Input Run On Timer - 0 - 20min - CFCU2 x Remote controller FLEX - for VEKO INT2 x Vent Axia ACM 150 inline mixed flow duct fan1 x Helios TSW 7.5 Amp Transformer speed controller2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x ELTA - Single Phase Transformer 16amps1 x Elta 6 Amp Electronic single phase speed controller with TK1 x Round ceiling diffuser 400mm1 x Airvent ceiling fan controller1 x Elta 3 Amp Electronic single phase speed controller.1 x JSR 200 Painted RAL50181 x ELTA - Single Phase Transformer 12amps2 x Transformer 5 Speed Controller - ATC1-10TK1 x Transformer 5 Speed Controller - ATC1-4TK1 x Circular Ceiling Diffuser - TST 1602 x Helios TSW 0.3Amp Compact Transformer speed controller1 x ELTA - Single Phase Transformer 4amps1 x Envirovent 4 Way Remote Control Switch - SWHBKRF-41 x COM-31 x AIRVENT speed control - AIR4019611 x Balance S Diffuser - NO RING - 100mm1 x EFSC-6N- Single Phase Speed Control1 x Round ceiling diffuser 200mm1 x Elta 6 Amp Electronic single phase speed controller.1 x Round ceiling diffuser 300mm1 x TDP-D Pressure Sensor with Display1 x Round ceiling diffuser 250mm1 x RDS 11 Helios Transformer Controller With Motor Protection1 x Helios TSW MCB Amp Transformer speed controller1 x PCA Diffuser - PCA-2501 x ELTA - Single Phase Transformer 10amps2 x Vent Axia ACM 100 inline mixed flow duct fan1 x Round ceiling diffuser 350mm1 x Transformer 5 Speed Controller - ATC1-8TK1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Temperature Fan Speed Controller - ATCP4-WMS
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