• 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 KMBI 315 Connector rectangular/circular to install on the discharge of CMT1 x Elta Variable Speed Drive IP66 - 7.5KW2 x Elta Variable Speed Drive IP66 - 2.2KW1 x FRQ-10A V2 Inverter Speed controller1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 15 40 Frequency Inverter1 x FU 22 25 Frequency Inverter4 x Elta Variable Speed Drive IP66 - 0.75KW1 x FU 075 52 Frequency Inverter (IP20)1 x FRQ5-10A Inverter Speed controller1 x Elta Variable Speed Drive IP66 - 5.5KW1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FU 15 16 Frequency Inverter1 x FU 22 04 Frequency Inverter1 x Frequency converter RUCK - FU 075 211 x FU 075 04 Frequency Inverter (IP20)1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x Elta 10 Amp Electronic single phase speed controller.1 x ELTA - Three Phase Transformer 10amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Three Phase Transformer 3amps1 x ELTA - Single Phase Transformer 2amps1 x NKS-D swirl diffuser v-300 x 300mm1 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1255 x Electronic extractor fan speed controller - FSC 1.54 x EC6H - Reversible Group Fan Electronic Controller1 x Circular Ceiling Diffuser - TST 1001 x PCA Diffuser - PCA-3151 x Curved Blade Grille 600x600 (2way blow)1 x Circular Ceiling Diffuser - TST 2001 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps3 x Airvent ceiling fan controller1 x ELTA - Single Phase Transformer 8amps1 x JSR 200 Painted RAL50181 x Round ceiling diffuser 400mm1 x 5-Speed Controller for use with Elta SAX Classic Fans4 x Elta 3 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 12amps1 x Circular Ceiling Diffuser - TST 1601 x Elta 3 Amp Electronic single phase speed controller.4 x Elta 6 Amp Electronic single phase speed controller with TK1 x EFSC-3N- Single Phase Speed Control1 x Balance S Diffuser - NO RING - 100mm1 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019613 x COM-31 x EFSC-6N- Single Phase Speed Control1 x Round ceiling diffuser 200mm1 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 250mm1 x Elta 6 Amp Electronic single phase speed controller.1 x PCA Diffuser - PCA-2501 x ELTA - Single Phase Transformer 10amps1 x Round ceiling diffuser 350mm1 x Run On Timer - 5s - 4hrs - RT5A3 x Remote Timer Control - 13512 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer3 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B2 x 7 Day Programmable TIMECLOCK2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans4 x Systemair Save Connect 2.0 Internet Module5 x Helios TSW MCB Amp Transformer speed controller1 x TTC-2000 Three phase electric heater controller1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x CONTROL ECOWATT - Basic1 x EM30-24 Electro-Mechanical Control Panel1 x ACO 149-ACO1/EDV2 x Envirovent G4 Filter - SL-G4/F71 x Elta ACO Panel 149-ACO18B1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x EM30-24 Control Panel Commissioning Service1 x Envirovent 4 Way Remote Control Switch - SWHBKRF-43 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan4 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Remote controller FLEX - for VEKO INT2 x Transformer 5 Speed Controller - ATC1-10TK2 x Transformer 5 Speed Controller - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-8TK2 x Helios TSW 3 Amp Transformer speed controller3 x Single phase speed controller by auto-transformer - RMB 1.5 Amp3 x MWS 3 – Transformer Controller With Motor Protection2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x Helios HQW-200/2 - IP554 x Helios HQW-630/4 - IP552 x Helios TSW 7.5 Amp Transformer speed controller1 x Vent Axia ACM 150 inline mixed flow duct fan2 x Helios TSW 0.3Amp Compact Transformer speed controller2 x Transformer 5 Speed Controller - ATC1-12TK3 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Vent Axia ACM 100 inline mixed flow duct fan5 x Vent Axia ACM 125 inline mixed flow duct fan3 x CS2 Current Switch3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x TG-K Duct temperature sensor4 x Isolator Switch - ISOSW2 x Single phase speed controller by auto-transformer - RMB 8.0 Amp2 x BEAS-control module2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted5 x MWS 1.5 – Transformer Controller With Motor Protection5 x WS - Reversing Switch from Helios Fans5 x Transformer (silent) speed controller - RE 3.0 Amp4 x Helios HQW-200/4 - IP551 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x REE-1 Electronic Speed Controller2 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS2 x Vent Axia T-Series Controller2 x Temperature Fan Speed Controller - ATCP4-WMS2 x Helios TSW 1.5 Amp Transformer speed controller4 x MV-B Dual Switch for use with Helios HQW plate fans,2 x TG-K3/NTC10-01 - Duct temperature sensor1 x Easy-fix termination kit - High Rise Ventilator - EFT3 x Helios TSW 10 Amp Transformer speed controller1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR1 x DEF-140T Inlet Guard for the CBT-100N2 x Multiflow SMB550/4-1AC1 x Transformer Speed Control - RTRE- 12.0Amp2 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Transformer (silent) speed controller - RE 1.5 Amp2 x Speed Controller - REB51 x Quietflow SQS400-1ECL - Centrifugal Box Fan2 x TG-R room temperature sensor1 x KKS 100 silencer-section - For use with the MUB 100 size Fans.1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x CBS-60 Outlet Flange for CSB/CBT-601 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 355
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Reviews
DAOSL Back Draft Damper
DAOSL Back Draft Damper
£ 11.49

Look good, works well, except the shaft of the lanellae cuts...