• 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 Duct Termination with Mesh - 710mm3 x Duct Termination with Mesh - 355mm2 x Nicotra RDH G2E7-04501 x TD160-NT Mixvent - 100mm - TD160 Timer1 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR2 x Elta SCP400/4-1AC - IP552 x HIMF - Mixed Flow Fan 125mm Inline Fan1 x Flat Roof Terminal -OFT 5 - Asphalt1 x Vent Axia Silent 100T (TIMER)1 x Helios HQW-355/4 - IP552 x 125mm Round Connector with Damper1 x Clearflow CF Roof Mounted Vertical Discharge Centrifugal Fan - CF450/4-1AC - Single Phase2 x ELTA - Single Phase Transformer 2amps1 x RDH Flange - 03151 x 204 x 60mm Duct to Fitting Connector for use with Insulated Thermal Ducting1 x HXP450/6-1 - 6 Pole - Single Phase1 x CAD-COMPACT 900 ADVANCED N8 - MVHR unit1 x TD EVO-100 PF ECOWATT - Environmentally Friendly Energy Efficient Inline Fan1 x RDH Flange - 02501 x REU 1.5amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost2 x Two Speed Switch - REGUL-21 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)3 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 1100watt 6PT (Closed Motor)1 x Duct Termination with Mesh - 400mm1 x Silentub - STUB 2001 x Kitchavent 2000 Odour control System - 18152521 x Elta SCP500/4-1AC - IP553 x Silentub - STUB 1003 x Envirovent Silent MV160/100S Mixvent - 100mm - (5 year warranty)1 x REB Ecowatt Speed Control - REB-ECO1 x RDH Flange - 04501 x 110 x 54mm Round to Rectangular Adaptor - Long1 x Helios ESA-1 Surface mounted Speed Control 1amp2 x Elta SCP350/4-1AC - IP551 x ELTA - Single Phase Transformer 12amps2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Universal Pipe Fixing Clip1 x Clearflow CF Roof Mounted Vertical Discharge Centrifugal Fan - CF350/4-1AC - Single Phase1 x RDH Flange - 04002 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x SPI-100 C Iris damper1 x Etamaster EM 355 EC 01 inline mix-vent fan1 x RD31S-4EW.6Q.AL - 122296 (Single Phase)1 x RDH E0-0400 Mounting Feet (pair)1 x Helios PA10 Speed Potentiometer1 x TD160 Mixvent - 100mm - TD160-N Standard2 x 110 x 54mm Equal Horizontal T-Piece1 x Elta SLC500/4B-1AC - IP551 x TD ECOWATT 160/100 Inline Duct Fan - TD-ECOWATT3 x 110 x 54mm Vertical 45 Degree Bend1 x Duct Termination with Mesh - 315mm1 x Elta SCP500/4-3AC - IP551 x Helios SB EC 125 A SilentBox Centrifugal Fan1 x 2mtr Round Ducting - 100mm1 x FU 075 04 Frequency Inverter (IP20)1 x 110 x 54mm Low Profile Plastic Ducting - 1 Meter1 x 110 x 54mm Vertical 90 Degree Bend1 x Elta SCP450/4-1AC - IP552 x ELTA - Single Phase Transformer 4amps1 x CAD-COMPACT 500 ADVANCED N8 - MVHR unit2 x Contra Rotating TCBBx2-630 Cased Axial - Single Phase - IP65 - Soler & Palau1 x 125mm Round Equal T Piece1 x Elta Standard Ambient Flexible Connector - 500mm1 x Impeller Side Guard - 630mm1 x Ducting 90 Degree Bend - 355mm1 x Duct Mounted Filter Box With G2 Paper AND Metal Washable Filter - 150mm1 x Spiral Ducting 1 meter - 450mm1 x Jetflow Silent SJMF-S 150-1EC1 x Elta 6 Amp Electronic single phase speed controller.2 x Flanged Damper 019-0560-STD1 x 100mm Round Connector3 x Anti Vibration Mounts - Small - Pack of 4 - AVM21 x 100mm Round 90 Degree Bend1 x Ducting 90 Degree Bend - 450mm1 x Elta SCP710-1EC1 x 204 x 60mm Duct to Duct Connector for use with Insulated Thermal Ducting1 x TDP-D Pressure Sensor with Display1 x 220x90mm to 204x60mm Rectangular Adapter2 x Ducting 15 Degree Bend - 100mm1 x Spiral end cap - 150mm1 x Ducting 45 Degree Bend - 100mm1 x MWS 5 – Transformer Controller With Motor Protection Unit1 x MWS 3 – Transformer Controller With Motor Protection1 x MTP 10, 10K, Speed control1 x EC Trickle and boost module - IP561 x ENV 100 12v transformer SELV1 x TUNE-R-250-3-M0 - Control Damper (NO ACTUATOR)1 x RUCK MTP 20, 10K, Speed control1 x Biflow SB250-CON4-1 - High Temperature Bifurcated Fan1 x Ancillary Pack for SB-Biflow 250 model1 x Acoustic Box Fans (Inline) - CAB-355 RE1 x TEM 035 - 5 Speed Transformer Speed Control1 x 110 x 54mm Short Rectangular to Round Adaptor Female1 x Ducting 45 Degree Bend - 710mm1 x 150mm Round Connector1 x Soaker Sheet to suit RA630/7101 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x JMS-3001 x Elta Standard Ambient Flexible Connector - 315mm1 x Speed Controller - REB161 x Speed Controller - REB2.5-N1 x Duct Termination with Mesh - 200mm1 x Eco-Loft Positive Input Ventilation System - PIV Loft Mounted -EVL-H2 x Electronic extractor fan speed controller - FSC 1.51 x Helios TSW 3 Amp Transformer speed controller1 x Rectangular Airbrick Adaptor1 x Multileaf Volume Control Dampers -500/500 Rectangular Flanged1 x UB47- Universal Insulated Terminal1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x DEF-CBM-RE-7 - Protection Guard1 x Remote controller FLEX - for VEKO INT1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Speed Controller - REB1-N1 x Transformer Speed Control - RTRE- 1.5Amp
Reviews
Duct Mounted Inline Filter - EU4
Duct Mounted Inline Filter - EU4
£ 44.99

Well made and robust, but it was not use for my application ...