• 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 Remote Timer Control - 13513 x MWS 3 – Transformer Controller With Motor Protection1 x Push Timer Switch - ZA42 x Isolator Switch - ISOSW1 x COM-31 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x Helios ZNE Electronic Fan Overrun Timer1 x CS2 Current Switch1 x Multi Input Run On Timer - 0 - 20min - CFCU1 x ACO8AC/EC AutoChangeover panel2 x TG-K Duct temperature sensor1 x 7 Day Programmable TIMECLOCK2 x Elta 6 Amp Electronic single phase speed controller with TK1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Systemair Save Connect 2.0 Internet Module1 x TTC-2000 Three phase electric heater controller2 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Helios HQW-200/2 - IP552 x Single phase speed controller by auto-transformer - RMB 8.0 Amp2 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Elta ACO Panel 149-ACO14E1 x EM30-24 Electro-Mechanical Control Panel1 x CONTROL ECOWATT - Basic2 x Elta Variable Speed Drive IP66 - 0.75KW1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x Transformer (silent) speed controller - RE 1.5 Amp1 x EC-Vent control board1 x Isolator Switch - EFF-ISO2 x Envirovent G4 Filter - SL-G4/F71 x Transformer 5 Speed Controller - ATC1-12TK2 x MWS 1.5 – Transformer Controller With Motor Protection1 x TG-K3/NTC10-01 - Duct temperature sensor1 x ACO 149-ACO1/EDV2 x Vent Axia Silent 100T (TIMER)1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x EC6H - Reversible Group Fan Electronic Controller2 x Transformer Speed Control - RTRE- 7.0Amp1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection2 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Vent Axia T-Series Controller1 x Speed Controller - REB103 x Transformer (silent) speed controller - RE 3.0 Amp3 x Helios HQW-630/4 - IP551 x VTR 300 STD Filter Kit1 x REE-1 Electronic Speed Controller2 x Multiflow SMB550/4-1AC1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011593 x WS - Reversing Switch from Helios Fans1 x CMT-2 120/50 - 0,09Kw - LG270 Single inlet centrifugal fan direct driven1 x Speed Controller - REB81 x Speed Controller - REB51 x SG-200 Fan Guard for the HQW 2001 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x Helios HQW-200/4 - IP551 x Electronic extractor fan speed controller - FSC 1.51 x Elta Variable Speed Drive IP66 - 2.2KW1 x Envirovent Silent MV160/100S Mixvent - 100mm - (5 year warranty)1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Transformer 5 Speed Controller - ATC1-4TK1 x HIMF - Mixed Flow Fan 100mm Inline Fan1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x AIRVENT speed control - AIR4019611 x GXC6EC - High Performance Extract Fan2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x PIR Sensor - PIR21 x Speed Controller - REB11 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Airvent ceiling fan controller1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan1 x TUNE-R-200-3-M1 - Control Damper1 x Speed controller with Reverse - REB-1R1 x Elta 6 Amp Electronic single phase speed controller.1 x CBM 9-9 550w 4P VR (Open Motor)1 x TUNE-R-200-3-M4 - Control Damper1 x EBM-Papst D4E225-BC01-17 Double inlet1 x Transformer 5 Speed Controller - ATC1-8TK
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