• 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 Speed Controller - REB101 x ELM 18 EX Flexible Cuff for ERM 181 x Speed Controller - REB81 x Elta SCP400/4-1AC - IP553 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR4 x DDMP 12-12 3F 5700W M6M0 DG74 x DDMP 10-10 1F 1000W M6A2 DA52 x GRA-100 External Grill by S&P1 x Duct Termination with Mesh - 150mm5 x 125mm Round Connector with Damper3 x ACO8AC/EC AutoChangeover panel1 x ELM 20 EX Flexible Cuff for ERM 225 x ELTA - Three Phase Transformer 3amps3 x CBM 7/7 147w 4P RE-VR5 x ELTA - Single Phase Transformer 2amps1 x DDMP 12-09 1F 1800W M6A4 DA83 x Universal Pipe Fixing Clip2 x Duct Termination with Mesh - 250mm1 x CBT-100N Centrifugal1 x RDH Flange - 04003 x CBS-100 Outlet Flange for CBT-1001 x Helios ZNE Electronic Fan Overrun Timer5 x HXP450/6-1 - 6 Pole - Single Phase5 x Potentiometer EGH 01 - for DDMP Fans2 x 204 x 60mm Duct to Fitting Connector for use with Insulated Thermal Ducting4 x DDMP 12-12 1F 1800W M6A4 DA82 x CBA-100 Inlet Flange for CBT-1004 x 220x90mm x 1m Insulated Rectangular Duct1 x RDH Flange - 04501 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011593 x DDMP 10-08 1F 1000W M6A2 DA55 x ACOAS/ AC/EC Auto Changeover 8Amp2 x CBT-100N Centrifugal ATEX II 2G Exe II T33 x DDMP 10-08 FLANGE1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan3 x Duct Termination with Mesh - 450mm1 x Biflow SB315-CON4-3 - High Temperature Bifurcated Fan1 x WSD 100 (1060x1060x70)4 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 1100watt 6PT (Closed Motor)1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR1 x Duct Termination with Mesh - 315mm1 x RD31S-4DW.6Q.AL - 121303 (Three Phase)1 x Duct Termination with Mesh - 200mm1 x CBA-130 Inlet Flange for CBT-1301 x SD-MUB Vibration pad set1 x 204x60mm to 220x90mm Rectangular Adapter2 x CBT-130N Centrifugal1 x Flakt Woods ME 1.3 speed controller 3amp - EA9011581 x Elta SCP500/4-1AC - IP551 x CBT-130N Centrifugal ATEX II 2G Exd IIB T41 x DA9/9-NT1 x Nicotra RDH G2E7-04501 x Atex Inline Fan 180mm - ERM18EXE1 x RD31S-4EW.6Q.AL - 122296 (Single Phase)1 x CBM Low Pressure Centrifugal Fan - CBM 9/9 4 Pole 550watt C VR1 x 220 x 90mm Duct to Fitting Connector for use with Insulated Thermal Ducting1 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x Helios TSW 1.5 Amp Transformer speed controller1 x Duct Termination with Mesh - 355mm1 x DDMP 10-08 3F 2210W M6A4 DG01 x RDH E0-0400 Mounting Feet (pair)2 x 110 x 54mm Short Rectangular to Round Adaptor male1 x Vent Axia W300310 Controller Electronic 1.5A1 x Flakt Woods ME 1.1 speed controller 1amp - EA9011571 x CAD-COMPACT 500 ADVANCED N8 - MVHR unit1 x Helios HQW-200/2 - IP551 x Multileaf Volume Control Dampers -500/500 Rectangular Flanged1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x Revolution SLCX ATEX Long Cased Axial Flow Fan SLCX500/4-3 Three Phase1 x RUCK MTP 30, Stepped Speed control1 x Elta SCP315/4-1AC - IP551 x Multi Input Run On Timer - 0 - 20min - CFCU
Reviews
Transformer (silent) speed controller - RE 1.5 Amp
Transformer (silent) speed controller - RE 1.5 Amp
£ 132.29

Unbelievable! With TDmixvent500: noise reduction minimum 50%...