• 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 Curved Blade Grille 600x600 (2way blow)1 x Circular Ceiling Diffuser - TST 2001 x Round ceiling diffuser 400mm1 x JSR 200 Painted RAL50181 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 200mm1 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 300mm1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 250mm1 x Round ceiling diffuser 350mm1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter FU 075 14 - IP661 x FU 22 25 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 0.75KW1 x FRQ5-4A V2 Inverter Speed Controller1 x FU 075 52 Frequency Inverter (IP20)1 x FRQ-10A V2 Inverter Speed controller1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Three Phase Transformer 3amps1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Elta 10 Amp Electronic single phase speed controller.1 x FU 22 04 Frequency Inverter1 x Frequency converter RUCK - FU 075 211 x Frequency converter RUCK - FU 075 381 x FU 075 04 Frequency Inverter (IP20)1 x ELTA - Three Phase Transformer 10amps1 x ELTA - Single Phase Transformer 2amps1 x Electronic extractor fan speed controller - FSC 1.51 x EC6H - Reversible Group Fan Electronic Controller2 x Airvent ceiling fan controller1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 12amps1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller.4 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps1 x ELTA - Single Phase Transformer 8amps1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019614 x COM-31 x EFSC-6N- Single Phase Speed Control1 x Elta 6 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x Run On Timer - 5s - 4hrs - RT5A1 x Remote Timer Control - 13515 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FRQ5-10A Inverter Speed controller1 x FU 15 16 Frequency Inverter1 x Balance S Diffuser - NO RING - 125mm1 x Circular Ceiling Diffuser - TST 1251 x PCA Diffuser - PCA-3151 x Circular Ceiling Diffuser - TST 1008 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan2 x Helios TSW 7.5 Amp Transformer speed controller2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 150 inline mixed flow duct fan3 x Multi Input Run On Timer - 0 - 20min - CFCU2 x Envirovent 4 Way Remote Control Switch - SWHBKRF-46 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 - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-10TK1 x Transformer 5 Speed Controller - ATC1-8TK2 x Helios TSW 0.3Amp Compact Transformer speed controller3 x Helios TSW 3 Amp Transformer speed controller3 x Vent Axia ACM 200 inline mixed flow duct fan1 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Helios TSW MCB Amp Transformer speed controller2 x Temperature Fan Speed Controller - ATCP4-WMS2 x Vent Axia ACM 100 inline mixed flow duct fan6 x Vent Axia ACM 125 inline mixed flow duct fan2 x Helios TSW 1.5 Amp Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,3 x CS2 Current Switch8 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Isolator Switch - ISOSW3 x MWS 3 – Transformer Controller With Motor Protection7 x Systemair Save Connect 2.0 Internet Module1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x TG-K Duct temperature sensor2 x 7 Day Programmable TIMECLOCK1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x DEF-140T Inlet Guard for the CBT-100N1 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 Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Elta ACO Panel 149-ACO14E1 x Helios HQW-200/2 - IP552 x BEAS-control module1 x EC-Vent control board1 x ACO 149-ACO1/EDV1 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted2 x MWS 1.5 – Transformer Controller With Motor Protection2 x Elta ACO Panel 149-ACO18B2 x TG-K3/NTC10-01 - Duct temperature sensor1 x EC-Vent Room Unit2 x WS - Reversing Switch from Helios Fans1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6302 x Helios HQW-630/4 - IP551 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x EM30-24 Electro-Mechanical Control Panel2 x Vent Axia T-Series Controller3 x Helios HQW-200/4 - IP551 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5003 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Transformer (silent) speed controller - RE 3.0 Amp1 x REE-1 Electronic Speed Controller1 x Envirovent G4 Filter - SL-G4/F7
BD7/7 centrifugal M4 0.13Kw
BD7/7 centrifugal M4 0.13Kw
£ 345.00 now £ 300.00
Reviews
DAOSL Back Draft Damper
DAOSL Back Draft Damper
£ 11.49

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