• 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 Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x MWS 3 – Transformer Controller With Motor Protection1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Isolator Switch - ISOSW2 x Elta 6 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x RDS 7 Helios Transformer Controller With Motor Protection1 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT2 x CBS-60 Outlet Flange for CSB/CBT-601 x MEV Spider Wireless boost Switch - MEV-SWH-W1 x CMT-2 225/090 1.1KW - Single inlet centrifugal fan direct driven2 x MWS 1.5 – Transformer Controller With Motor Protection1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp2 x Transformer (silent) speed controller - RE 1.5 Amp1 x RDH FLEX-SQUARE - ADH/RDH 04501 x TG-K3/NTC10-01 - Duct temperature sensor1 x EC6H - Reversible Group Fan Electronic Controller1 x CBA-60 Inlet Flange for CBT-602 x Helios HQW-200/4 - IP551 x EBM-Papst D4E225-BC01-17 Double inlet1 x Helios HQW-630/4 - IP554 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)3 x SG-200 Fan Guard for the HQW 2001 x Vent Axia Silent 100T (TIMER)1 x Airvent ceiling fan controller1 x Transformer (silent) speed controller - RE 3.0 Amp1 x Multiflow SMB550/4-1AC1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x Elta Variable Speed Drive IP66 - 0.75KW2 x TD Mixvent 800/200 EEXEIIT31 x CSB-60 Centrifugal fan1 x HIMF - Mixed Flow Fan 100mm Inline Fan1 x Transformer Speed Control - RTRE- 7.0Amp1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x CBM Low Pressure Centrifugal Fan - CBM 7/7 6 Pole 72watt CVR1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x MV-B Dual Switch for use with Helios HQW plate fans,1 x ELM 18 EX Flexible Cuff for ERM 181 x Helios HQW-250/4 - IP552 x CMT-2 120/50 - 0,09Kw - LG270 Single inlet centrifugal fan direct driven1 x CBT-100N Centrifugal2 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x CBM Low Pressure Centrifugal Fan - CBM 9/9 4 Pole 550watt 3V (3-Speed)1 x Vent Axia ACM 200 inline mixed flow duct fan1 x RRB- transformer controller1 x Vent Axia ACM 100 inline mixed flow duct fan1 x Vent Axia T-Series Controller1 x Helios TSW 1.5 Amp Transformer speed controller
Reviews
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