• 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

2 x Isolator Switch - ISOSW2 x MWS 3 – Transformer Controller With Motor Protection1 x TTC-2000 Three phase electric heater controller2 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Elta ACO Panel 149-ACO14E1 x CONTROL ECOWATT - Basic3 x Systemair Save Connect 2.0 Internet Module1 x TG-K Duct temperature sensor1 x EC-Vent control board1 x EM30-24 Electro-Mechanical Control Panel2 x BEAS-control module1 x Helios HQW-200/2 - IP553 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x ACO 149-ACO1/EDV1 x Elta 6 Amp Electronic single phase speed controller with TK2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x Elta ACO Panel 149-ACO18B2 x Envirovent G4 Filter - SL-G4/F71 x Vent Axia ACM 100 inline mixed flow duct fan1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp3 x Vent Axia Silent 100T (TIMER)2 x Transformer 5 Speed Controller - ATC1-12TK1 x UB47- Universal Insulated Terminal2 x Speed Controller - REB103 x TG-K3/NTC10-01 - Duct temperature sensor2 x Helios HQW-200/4 - IP551 x Single phase speed controller by auto-transformer - RMB 10.0 Amp2 x SG-200 Fan Guard for the HQW 2001 x Helios HQW-250/4 - IP551 x Transformer Speed Control - RTRE- 7.0Amp1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service3 x PIR Sensor - PIR22 x PIR Sensor - PIR41 x MWS 1.5 – Transformer Controller With Motor Protection3 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Quietflow SQS100-1ECL - Centrifugal Box Fan1 x TD Mixvent 800/200 EEXEIIT33 x WS - Reversing Switch from Helios Fans2 x EBM-Papst D4E225-BC01-17 Double inlet1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Transformer (silent) speed controller - RE 1.5 Amp2 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)2 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR2 x Speed Controller - REB82 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS3 x Transformer (silent) speed controller - RE 3.0 Amp1 x Airvent ceiling fan controller2 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan1 x Multiflow SMB550/4-1AC1 x Quietflow SQS400-1ECL - Centrifugal Box Fan1 x CFI In-line 425 - Carbon Filter1 x Elta Variable Speed Drive IP66 - 2.2KW2 x REE-1 Electronic Speed Controller3 x Helios ESA-1 Surface mounted Speed Control 1amp1 x TG-R room temperature sensor1 x Speed Controller - REB2.5-N2 x Electronic extractor fan speed controller - FSC 1.51 x Duct Termination with Mesh - 450mm1 x CBA-100 Inlet Flange for CBT-1002 x HIMF - Mixed Flow Fan 100mm Inline Fan2 x Speed controller with Reverse - REB-1R1 x DDMP 12-09 1F 1800W M6A4 DA82 x DDMP 12-12 3F 5700W M6M0 DG71 x Duct Termination with Mesh - 250mm1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x CBM 9-9 550w 4P VR (Open Motor)1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR1 x Remote Timer Control - 13511 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x CBM Low Pressure Centrifugal Fan - CBM 9/9 4 Pole 550watt 3V (3-Speed)1 x DPD 12PM Delivery Surcharge1 x CBA-60 Inlet Flange for CBT-601 x QPTW 250C Acoustic Twin Fan with Controller1 x Silentub - STUB 1001 x Transformer Speed Control - RTRE- 12.0Amp1 x CAD-COMPACT 900 ADVANCED N8 - MVHR unit1 x Contactor Interface Station - CI91 x Biflow SB250-CON2-3 - High Temperature Bifurcated Fan1 x Speed Controller - REB51 x ACO8AC/EC AutoChangeover panel1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x DDMP 12-12 3F 1810W M6A4 DG01 x DDMP 10-10 1F 1000W M6A2 DA51 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Helios TSW 1.5 Amp Transformer speed controller3 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan1 x Elta Variable Speed Drive IP66 - 0.75KW1 x TUNE-R-200-3-M1 - Control Damper1 x TUNE-R-200-3-M4 - Control Damper1 x Speed Controller - REB11 x AIRVENT speed control - AIR4019611 x CO2 Room Sensor - CO2-R1 x Vertical Cowl and Fan (Single Phase) - RAV400-4-11 x Quietflow Twin SQTDCV250-1ECL1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR1 x CMT-2 120/50 - 0,09Kw - LG270 Single inlet centrifugal fan direct driven1 x KBA- inlet mounting flange for CRMT 2501 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 200 inline mixed flow duct fan3 x Commercial Single or 3 phase Fan Reversing Switch - RS12 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

Excellent low noise fan, I've got one unit running years and...