• 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

2 x RDH FLEX-SQUARE - ADH/RDH 04502 x EC6H - Reversible Group Fan Electronic Controller1 x Transformer (silent) speed controller - RE 1.5 Amp1 x KKS 100 silencer-section - For use with the MUB 100 size Fans.2 x Quietflow SQS400-1ECL - Centrifugal Box Fan2 x Isolator Switch - EFF-ISO1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6303 x Speed Controller - REB105 x SG-200 Fan Guard for the HQW 2002 x MWS 1.5 – Transformer Controller With Motor Protection1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection4 x Helios HQW-200/4 - IP552 x Elta Variable Speed Drive IP66 - 2.2KW1 x Helios HQW-630/4 - IP554 x WS - Reversing Switch from Helios Fans1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)3 x REB-CVF 0-10v Controller1 x EM30-24 Control Panel Commissioning Service2 x TUNE-R-200-3-M1 - Control Damper1 x Speed Controller - REB1-N2 x Vent Axia T-Series Controller1 x Airvent ceiling fan controller4 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Transformer Speed Control - RTRE- 7.0Amp3 x Transformer (silent) speed controller - RE 3.0 Amp4 x MTP 10, 10K, Speed control2 x Helios HQW-315/4 - IP551 x Easy-fix termination kit - High Rise Ventilator - EFT2 x Vent Axia Silent 100T (TIMER)1 x Silent 100 Window Kit - windowS2 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x TD Mixvent 800/200 EEXEIIT32 x Electronic extractor fan speed controller - FSC 1.53 x Multiflow SMB550/4-1AC1 x Elta Variable Speed Drive IP66 - 0.75KW1 x PIR Sensor - PIR21 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS3 x Helios HQW-250/4 - IP551 x Remote Timer Control - 13511 x REE-1 Electronic Speed Controller1 x CBA-60 Inlet Flange for CBT-601 x CBM 9-9 550w 4P VR (Open Motor)1 x QPTW 250C Acoustic Twin Fan with Controller2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Transformer (silent) speed controller - RE 5.0 Amp1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Transformer Speed Control - RTRE- 1.5Amp1 x UB47- Universal Insulated Terminal1 x Helios TSW 1.5 Amp Transformer speed controller1 x ELM 18 EX Flexible Cuff for ERM 181 x MTS10- extractor fan 3 step switch1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Speed Controller - REB51 x RDS 11 Helios Transformer Controller With Motor Protection1 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Quietflow SQS100-1ECL - Centrifugal Box Fan1 x Speed controller with Reverse - REB-1R1 x Elta 10 Amp Electronic single phase speed controller.1 x PIR Sensor - PIR41 x DDMP 10-08 3F 2210W M6A4 DG01 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x DDMP 12-12 3F 1810W M6A4 DG01 x Compact SCD450/4-1AC1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan2 x Transformer Speed Control - RTRE- 12.0Amp2 x Speed Controller - REB11 x Speed Controller - REB81 x Vent Axia ACM 200 inline mixed flow duct fan1 x Elta 6 Amp Electronic single phase speed controller.1 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x ENV 100 12v transformer SELV1 x Elta Wall Cowl SWC56/631 x AXC TP - 100mm Plastic Centrifugal Inline Fan1 x TUNE-R-200-3-M4 - Control Damper1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x GRA-100 External Grill by S&P
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Reviews
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Well made and robust, but it was not use for my application ...