• 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 DDMP 10-08 3F 2210W M6A4 DG03 x VTR 300 STD Filter Kit3 x Speed Controller - REB2.5-N5 x SAVE VSR 300 heat recovery unit2 x Elta Variable Speed Drive IP66 - 1.5KW2 x EBM-Papst D4E225-BC01-17 Double inlet2 x Elta 6 Amp Electronic single phase speed controller.3 x Speed Controller - REB11 x Duct Termination with Mesh - 355mm1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7102 x WSD 100 (1060x1060x70)3 x SPI-100 C Iris damper1 x TUNE-R-200-3-M4 - Control Damper4 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR2 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Egg Crate Grille with Dust panel filter 1 inch- 595x5952 x CBA-60 Inlet Flange for CBT-602 x Transformer Speed Control - RTRE- 1.5Amp1 x Single Deflection Grille 400mm with OBD damper3 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan3 x Duct Termination with Mesh - 100mm7 x Helios RR-250-C Centrifugal inline fan1 x SD-MUB Vibration pad set3 x AIRVENT speed control - AIR4019612 x CBM 12-12 1100w 6P Three Phase2 x CO2 Room Sensor - CO2-R2 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011593 x Duct Termination with Mesh - 450mm4 x CBT-100N Centrifugal1 x GXC6EC - High Performance Extract Fan1 x Vertical Cowl and Fan (Single Phase) - RAV400-4-11 x RD35S-4DW.6W.3L - 122297 (Three Phase)3 x Round ceiling diffuser 250mm4 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR4 x LFBR 160 G4 - Helios Inline Filter Box - 160mm5 x HIMF - Mixed Flow Fan 100mm Inline Fan2 x CSB-60 Centrifugal fan1 x ENV 100 12v transformer SELV2 x Comefri - TLZ 450 R - High Performance Scroll Fan5 x Helios ESA-1 Surface mounted Speed Control 1amp1 x CK-60F Kit1 x Round ceiling diffuser 200mm1 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH5 x ACO8AC/EC AutoChangeover panel2 x Silentub - STUB 1001 x CBA-100 Inlet Flange for CBT-1005 x DDMP 12-12 3F 5700W M6M0 DG75 x Helios HQW-355/4 - IP551 x VTR 500 STD Filter Kit1 x TUNE-R-200-3-M2 - Control Damper3 x Elta SCP400/4-1AC - IP552 x Multi Input Run On Timer - 0 - 20min - CFCU1 x RDS 1 Helios Transformer Controller With Motor Protection2 x KAD-225-F400 Rectangle Flexible Connector2 x CFI In-line 150 - Carbon Filter3 x TecFire Intumescent Damper - Rectangular 400x400mm1 x DEF-CBM-RE-7 - Protection Guard2 x Quietflow Twin SQTDCV250-1ECL1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR5 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost2 x Mini Diffuser - 100mm1 x KBA- inlet mounting flange for CRMT 2502 x Electrostatic Precipitator - 1H x 3W2 x Flat Roof Terminal -OFT 5 - Asphalt2 x Elta SPA500/4-1AC - IP542 x ELTA - Three Phase Transformer 3amps2 x 100mm Round Connector with Damper3 x CPTA-E Flush mounted PIR sensor with timer3 x RTRD - Three Phase Speed Controller - 2 Amp1 x Three Phase 3 step - 10amp Transformer controller for use with the HV Wall Mounted fans.2 x FRQ5-4A V2 Inverter Speed Controller2 x Transformer Speed Control - RTRE- 5.0Amp3 x MTS10- extractor fan 3 step switch2 x FU 22 25 Frequency Inverter1 x Contactor Interface Station - CI92 x DDMP 10-10 1F 1000W M6A2 DA51 x Duct Termination with Mesh - 150mm1 x CBS-100 Outlet Flange for CBT-1001 x Transformer 5 Speed Controller - ATC1-10TK2 x Easy-fix termination kit - High Rise Ventilator - EFT2 x HIMF - Mixed Flow Fan 125mm Inline Fan1 x TUNE-R-200-3-M0 - Control Damper (NO ACTUATOR)1 x Vent Axia Silent 100T (TIMER)1 x Speed Controller - REB1-N2 x VKS 355-500 Automatic shutter1 x Elta HXP 800mm 6-Pole (Three Phase)2 x Transformer Speed Control - RTRE- 3.0Amp2 x Speed Controller - REB161 x KBA- Inlet Mounting 2251 x TD Mixvent 1100/250 EEXEIIT31 x Elta Variable Speed Drive IP66 - 5.5KW2 x DS-2 2-Speed Switch (3 Phase)1 x VEKA INT 2000/15.0-L1 EKO1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Clearflow CF Roof Mounted Vertical Discharge Centrifugal Fan - CF450/4-1AC - Single Phase1 x ACO3TO-ADS-VFC-7.1A1 x RUCK MTP 20, 10K, Speed control1 x CBB-60N Centrifugal1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x Transformer (silent) speed controller - RE 1.5 Amp1 x Vent Axia SC5001 - Speed controller1 x Silent 300 CZ Design PLUS Extractor Fan1 x EFSC-3N- Single Phase Speed Control1 x RDH Flange - 03151 x Envirovent Silent MV160/100S Mixvent - 100mm - (5 year warranty)1 x MWS-75 Transformer controller with TK -7.5A1 x RDH Flange - 02502 x Binks Bullows - Spray Booth Filter1 x Duct Termination with Mesh - 250mm1 x Speed Controller - REB51 x ELTA - Single Phase Transformer 2amps1 x SDD-U Anti Vibration Pads1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan1 x CBT-80N Centrifugal
Reviews
Circular Inline Silencers - 0.6M long - SLU-600
Circular Inline Silencers - 0.6M long - SLU-600
£ 58.40

I have a loft mount extractor fan which was very noisy. I ...