• Model:DAOSL

DAOSL Back Draft Damper

£ 10.53 (excl. VAT)

£ 12.64 (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 and 125mm, Please select above..
NB. 100mm and 150mm out of stock until mid February. Try the BDP

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 Duct Mounted Filter Box - G4 Grade Panel - 355mm1 x KVK SLIM 200 EC - Centrifugal Circular Duct Fan1 x HRFD 250/4 EX Atex Rated 250mm Cased Axial Fan 400v1 x Elta Turboflow-TF - 630mm - Three phase1 x Purlin Box 350 for RAW Cowls1 x Helios GigaBox 560mm GBD 560/4/4 centrifugal1 x Revolution SLCX ATEX Long Cased Axial Flow Fan SLCX400/4-3 Three Phase1 x CBMT/Q 315-30 1 HEATER KIT1 x CFDM-125 Circular Twin Blade Fire Damper1 x Duct Mounted Filter Box - 500mm - M6 grade Bag filter1 x CBMT/Q 150-27 1 HEATER KIT1 x Duct Mounted Filter Box With G2 Paper AND Metal Washable Filter - 400mm1 x Raptor SDA630/4-3EC1 x JAA-560 Acoustic Upstand1 x TCBT/4-450/H EXEIIBT4 ATEX1 x Helios SB-200-C SilentBox Acoustic Inline Fan1 x Activated Carbon Discarb Cell - Grade 50 - EXTRA DUTY - 445H x 445W x 595Dmm ACTUAL1 x Belt Drive Cased Axial Fan - 710mm - H version1 x GENIOX 11 Roof Mounted External Unit1 x Blast Gate (Manual) 100mm1 x Access Door for Circular Duct - 300 x 200 - SIZE 351 x Duct Termination with Mesh - 450mm1 x Elta Wall Cowl SWC45/501 x CFI Lite 600 Carbon Filter1 x HD Series Control Damper - 3000mm X 1500mm1 x Shoed T Piece Un-Equal -450mm-315mm1 x Belt Drive Cased Axial Fan - 630mm - L version1 x Flanged Spigot - 450mm1 x Ducting Y Piece - 100mm1 x *VORT HRW 40 MONO Evo HCS WIFI - Single Room Heat Recovery Unit,1 x Biflow SB250-CON4-1 - High Temperature Bifurcated Fan1 x Miniflow SMF Horizontal Roof Cowl SMF131 x Access Door for Circular Duct - 250 x 150 - SIZE 251 x Soler & Palau - HCBT/4-900/L - IP551 x Access Door for Circular Duct - 300 x 200 - SIZE 401 x Male Ducting Connector - 100mm1 x *VORT HRW 30 MONO Evo HCS WIFI - Single Room Heat Recovery Unit,1 x AKOR Mounting Plate for GD model(VIM166423)1 x Female Ducting Connector - 450mm1 x RSK450 - Back Draught Shutter1 x Commercial Activated Carbon Filters - Panel Type - 24" x 24" x 2" - ACP1 x *VORT HRW 30 MONO Evo HCS - Single Room Heat Recovery Unit,1 x Spiral Ducting 1 meter - 100mm1 x SPI-200 C Iris damper1 x Belt Drive Cased Axial Fan - 800mm - H version1 x HRST/6-910/30-BZ
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