• 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 Egg Crate Grille with G2 Dust panel filter 1 inch- 300x3001 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x Single Deflection Grille 400mm with OBD damper1 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH1 x Mini Diffuser - 100mm1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 2.2KW1 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 TSD 5.5 Transformer Speed Control (400v)1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW1 x FRQ5-10A Inverter Speed controller1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 4.0KW1 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 Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x ELTA - Three Phase Transformer 3amps1 x ELTA - Single Phase Transformer 2amps1 x Balance S Diffuser - NO RING - 125mm1 x NKS-D swirl diffuser v-300 x 300mm1 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1001 x PCA Diffuser - PCA-3151 x Elta 2 Amp Electronic single phase speed controller.4 x Elta 6 Amp Electronic single phase speed controller with TK1 x Circular Ceiling Diffuser - TST 2001 x ELTA - Single Phase Transformer 16amps1 x ELTA - Single Phase Transformer 8amps1 x Curved Blade Grille 600x600 (2way blow)2 x Airvent ceiling fan controller1 x Elta 3 Amp Electronic single phase speed controller with TK4 x COM-31 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 1601 x Round ceiling diffuser 400mm1 x JSR 200 Painted RAL50181 x ELTA - Single Phase Transformer 12amps1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller.1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x Round ceiling diffuser 300mm1 x Balance S Diffuser - NO RING - 100mm1 x Round ceiling diffuser 200mm1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x EFSC-6N- Single Phase Speed Control1 x Round ceiling diffuser 250mm1 x PCA Diffuser - PCA-2501 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 Round ceiling diffuser 350mm2 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 TIMECLOCK1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x TTC-2000 Three phase electric heater controller1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x EM30-24 Electro-Mechanical Control Panel1 x CONTROL ECOWATT - Basic1 x ACO 149-ACO1/EDV1 x Elta Wall Cowl SWC25/311 x Elta Wall Cowl SWC45/501 x Elta Wall Cowl SWC35/401 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 x 220x90mm Insulated Rectangular Vertical 90° Bend3 x Remote controller FLEX - for VEKO INT3 x Helios TSW 7.5 Amp Transformer speed controller2 x Vent Axia ACM 100 inline mixed flow duct fan3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp2 x Single phase speed controller by auto-transformer - RMB 10.0 Amp5 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan2 x Transformer 5 Speed Controller - ATC1-10TK1 x Transformer 5 Speed Controller - ATC1-4TK2 x Helios TSW 0.3Amp Compact Transformer speed controller6 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x BEAS-control module4 x Systemair Save Connect 2.0 Internet Module1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x Transformer (silent) speed controller - RE 1.5 Amp1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x RDH FLEX-SQUARE - ADH/RDH 04501 x Electronic extractor fan speed controller - FSC 1.51 x Speed Controller - REB101 x REB-CVF 0-10v Controller1 x SG-200 Fan Guard for the HQW 2003 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 150 inline mixed flow duct fan3 x Vent Axia ACM 200 inline mixed flow duct fan6 x Vent Axia ACM 125 inline mixed flow duct fan2 x MV-B Dual Switch for use with Helios HQW plate fans,2 x TG-K Duct temperature sensor2 x DEF-140T Inlet Guard for the CBT-100N3 x MWS 3 – Transformer Controller With Motor Protection1 x Helios HQW-200/2 - IP551 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven2 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x Envirovent G4 Filter - SL-G4/F74 x Isolator Switch - ISOSW1 x Elta ACO Panel 149-ACO18B1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6302 x Vent Axia T-Series Controller1 x FAST-TRACK RANGE 90mm - Click Ring (1 bag of 10)1 x Transformer (silent) speed controller - RE 3.0 Amp1 x Speed Controller - REB31 x Skyflow SSR Horizontal Roof Cowl SSR31/35B5 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan3 x Temperature Fan Speed Controller - ATCP4-WMS1 x Transformer 5 Speed Controller - ATC1-8TK2 x RRB- transformer controller2 x MWS 1.5 – Transformer Controller With Motor Protection1 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x FAST-TRACK RANGE 90mm - Adaptor For Distribution Box3 x Helios HQW-630/4 - IP552 x TG-K3/NTC10-01 - Duct temperature sensor3 x Envirovent 4 Way Remote Control Switch - SWHBKRF-42 x Transformer 5 Speed Controller - ATC1-12TK2 x Three Phase Transformer controllers - RMT 1.5 Amp2 x Helios TSW 3 Amp Transformer speed controller2 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x RDS 11 Helios Transformer Controller With Motor Protection2 x Helios TSW MCB Amp Transformer speed controller1 x Helios TSW 1.5 Amp Transformer speed controller2 x CS2 Current Switch1 x KMBI 315 Connector rectangular/circular to install on the discharge of CMT1 x Insulated extract Plenum 8+11 x Insulated extract Plenum 6+13 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Two Speed Switch - REGUL-21 x TEM 075 - 5 Speed Transformer Speed Control1 x WS - Reversing Switch from Helios Fans1 x ERR 20/1 Centrifugal inline fan
Reviews
DAOSL Back Draft Damper
DAOSL Back Draft Damper
£ 11.49

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