• Model:SLU-300

Circular Inline Silencers - 0.3M long - SLU-300

£ 38.85 (excl. VAT)

£ 46.62 (inc. VAT)

Inline Circular Attenuators in standard diameters from 100mm to 400mm diameter. Attenuators are available in standard 300mm, 600mm, 900mm and 1200mm lengths.
This version is 300mm long
The longer the unit, the more effective it is.

Attenuator construction for this range comprises a pre-galvanised sheet steel spiral wound outer casing, manufactured in accordance with HVCA DW144 specification, with circular spigoted end caps. The inner bore is manufactured from pre-galvanised and perforated spiral wound steel tube, retaining a 50mm thick scrim faced 45 kg/cu.m acoustic media.

This range of circular attenuators offer minimal resistance to airflow and can be used in a variety of noise control applications:-
• Small fan system attenuation
• Cross-talk attenuation
• System noise regeneration attenuation
• System terminal unit attenuation

PDF Files


Silencer Range


Range Spec sheet

Available Options

1 x Duct Termination with Mesh - 250mm5 x Helios TSW 1.5 Amp Transformer speed controller2 x Elta 10 Amp Electronic single phase speed controller.1 x Balance S Diffuser - NO RING - 125mm1 x PCA Diffuser - PCA-3151 x ELTA - Single Phase Transformer 2amps1 x Circular Ceiling Diffuser - TST 1253 x Electronic extractor fan speed controller - FSC 1.51 x Circular Ceiling Diffuser - TST 2001 x Versio Square Ceiling Diffusers - RS141 x Circular Ceiling Diffuser - TST 1602 x EC6H - Reversible Group Fan Electronic Controller1 x JSR 200 Painted RAL50181 x Balance S Diffuser - NO RING - 100mm1 x Elta 2 Amp Electronic single phase speed controller.1 x Elta 3 Amp Electronic single phase speed controller.2 x Round ceiling diffuser 200mm4 x Airvent ceiling fan controller1 x ELTA - Single Phase Transformer 8amps5 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps2 x EFSC-3N- Single Phase Speed Control2 x Elta 3 Amp Electronic single phase speed controller with TK4 x AIRVENT speed control - AIR4019611 x ELTA - Single Phase Transformer 12amps1 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 350mm4 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)4 x COM-35 x Round ceiling diffuser 250mm1 x ELTA - Single Phase Transformer 4amps1 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x PCA Diffuser - PCA-2501 x EFSC-6N- Single Phase Speed Control1 x ELTA - Single Phase Transformer 10amps1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)3 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A2 x Push Timer Switch - ZA42 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B7 x Multi Input Run On Timer - 0 - 20min - CFCU3 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp4 x ACO8AC/EC AutoChangeover panel1 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x ACO 149-ACO1/EDV1 x EM30-24 Electro-Mechanical Control Panel1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Elta ACO Panel 149-ACO18B1 x EC-Vent Room Unit1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3552 x Elta Variable Speed Drive IP66 - 0.75KW1 x Elta Wall Cowl SWC56/631 x GRA-100 External Grill by S&P1 x Elta Louvre Shutter - 400mm1 x Elta Wall Cowl SWC35/401 x Elta Wall Cowl SWC45/501 x Elta Wall Cowl SWC25/311 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 x Jet Cowl - 315mm1 x Egg Crate Grille with G2 Dust panel filter 1 inch- 300x3001 x Egg Crate Grille with Dust panel filter 1 inch- 595x5951 x Biflow SB250-CON2-3 - High Temperature Bifurcated Fan4 x Helios TSW 7.5 Amp Transformer speed controller1 x Circular Ceiling Diffuser - TST 1001 x Curved Blade Grille 600x600 (2way blow)1 x Round ceiling diffuser 400mm3 x Three Phase Transformer controllers - RMT 1.5 Amp6 x Vent Axia ACM 100 inline mixed flow duct fan3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp5 x Vent Axia T-Series Controller2 x Envirovent G4 Filter - SL-G4/F72 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)6 x Transformer (silent) speed controller - RE 3.0 Amp6 x Speed Controller - REB51 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x EM30-24 Control Panel Commissioning Service3 x REB-CVF 0-10v Controller3 x PIR Sensor - PIR23 x MTS10- extractor fan 3 step switch4 x Vent Axia Silent 100T (TIMER)5 x QPTW 250C Acoustic Twin Fan with Controller5 x Silentub - STUB 1002 x SAVE VSR 300 heat recovery unit4 x VEKA INT 2000/15.0-L1 EKO1 x Single Deflection Grille 400mm with OBD damper6 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan3 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan3 x Remote controller FLEX - for VEKO INT5 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans5 x Transformer 5 Speed Controller - ATC1-4TK3 x Transformer 5 Speed Controller - ATC1-12TK4 x Vent Axia ACM 200 inline mixed flow duct fan2 x Vent Axia ACM 150 inline mixed flow duct fan5 x Vent Axia ACM 125 inline mixed flow duct fan3 x Isolator Switch - ISOSW2 x BEAS-control module2 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x Transformer (silent) speed controller - RE 1.5 Amp2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)5 x Commercial Single or 3 phase Fan Reversing Switch - RS12 x Transformer (silent) speed controller - RE 5.0 Amp6 x Speed Controller - REB1-N4 x MTP 10, 10K, Speed control4 x REE-2 Electronic Speed Controller2 x CBM 9-9 550w 4P VR (Open Motor)2 x Elta Variable Speed Drive IP66 - 2.2KW2 x RDH FLEX-SQUARE - ADH/RDH 04505 x Speed Controller - REB12 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)2 x MEV Spider Wireless boost Switch - MEV-SWH-W3 x Silent 100 Window Kit - windowS4 x VTR 300 STD Filter Kit1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan3 x CBT-100N Centrifugal3 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Elta 6 Amp Electronic single phase speed controller.2 x Contactor Interface Station - CI91 x Compact SCD450/4-1AC2 x CFI In-line 425 - Carbon Filter2 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Biflow SB250-CON4-1 - High Temperature Bifurcated Fan2 x EBM-Papst D3G133-BF05-14 Double inlet2 x CO2 Room Sensor - CO2-R2 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan2 x DS-2 2-Speed Switch (3 Phase)2 x Envirovent 4 Way Remote Control Switch - SWHBKRF-46 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan3 x CPTA-E Flush mounted PIR sensor with timer2 x Temperature Fan Speed Controller - ATCP4-WMS4 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE3 x Transformer 5 Speed Controller - ATC1-8TK3 x Helios TSW 3 Amp Transformer speed controller3 x Transformer 5 Speed Controller - ATC1-10TK1 x RDS 11 Helios Transformer Controller With Motor Protection4 x Systemair Save Connect 2.0 Internet Module4 x CS2 Current Switch3 x DEF-140T Inlet Guard for the CBT-100N3 x MWS 3 – Transformer Controller With Motor Protection6 x Single phase speed controller by auto-transformer - RMB 1.5 Amp5 x RRB- transformer controller3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp4 x WS - Reversing Switch from Helios Fans2 x Helios HQW-200/2 - IP553 x Helios HQW-630/4 - IP553 x CBS-60 Outlet Flange for CSB/CBT-604 x TG-K3/NTC10-01 - Duct temperature sensor3 x Helios HQW-200/4 - IP551 x REE-1 Electronic Speed Controller1 x Isolator Switch - EFF-ISO3 x Transformer Speed Control - RTRE- 7.0Amp1 x Transformer Speed Control - RTRE- 5.0Amp2 x Transformer Speed Control - RTRE- 12.0Amp3 x Helios HQW-315/4 - IP553 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS5 x Transformer Speed Control - RTRE- 1.5Amp1 x Quietflow SQS400-1ECL - Centrifugal Box Fan2 x PIR Sensor - PIR43 x Helios HQW-250/4 - IP554 x DDMP 12-12 3F 1810W M6A4 DG02 x Elta Variable Speed Drive IP66 - 4.0KW2 x Mini Diffuser - 100mm3 x TUNE-R-200-3-M4 - Control Damper2 x DEF-CBM-RE-7 - Protection Guard3 x TD160-NT Mixvent - 100mm - TD160 Timer1 x Singleflow SSDL315-1EC3 x Duct Termination with Mesh - 100mm4 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR3 x CBA-100 Inlet Flange for CBT-1001 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH1 x Vertical Cowl and Fan (Single Phase) - RAV400-4-13 x Transformer 5 Speed Controller - ATC1-2TK3 x MWS 5 – Transformer Controller With Motor Protection Unit2 x RDS 1 Helios Transformer Controller With Motor Protection4 x Transformer speed controller - ATC1 - 1.5 Amps3 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT3 x TD EVO-100 PF ECOWATT - Environmentally Friendly Energy Efficient Inline Fan2 x TEM 075 - 5 Speed Transformer Speed Control1 x MEV300/160 Wireless Boost Switch - SWHWMEV2 x Vortice Quadro Micro 100 I - Standard Version1 x TG-R room temperature sensor3 x Skyflow SSR Horizontal Roof Cowl SSR31/35B3 x CBA-60 Inlet Flange for CBT-602 x TD Mixvent 800/200 EEXEIIT33 x Speed Controller - REB81 x TG-K Duct temperature sensor1 x Biflow SB315-CON4-3 - High Temperature Bifurcated Fan3 x FRQ5-10A Inverter Speed controller1 x HXP450/6-1 - 6 Pole - Single Phase1 x Speed Controller - REB2.5-N3 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR1 x 204x60mm Insulated Rectangular Vertical 45° Bend1 x Clearflow CF Roof Mounted Vertical Discharge Centrifugal Fan - CF400/4-1AC - Single Phase2 x Electrostatic Precipitator - 1H x 3W3 x CSB-60 Centrifugal fan1 x CBM 12-12 1100w 6P Three Phase4 x Helios RR-250-C Centrifugal inline fan1 x Polyurethane Foam Media - 10PPI - Filter Media Sheets - Size: 2000mm x 1000mm1 x HIMF - Mixed Flow Fan 100mm Inline Fan2 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011593 x VTR 500 STD Filter Kit2 x CFI In-line 150 - Carbon Filter3 x SPI-100 C Iris damper3 x IR24-P - Presence detector2 x WSD 100 (1060x1060x70)2 x SD-MUB Vibration pad set2 x Helios TSW 0.3Amp Compact Transformer speed controller2 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost2 x Helios TSW MCB Amp Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,1 x ERR 20/1 Centrifugal inline fan3 x MWS 1.5 – Transformer Controller With Motor Protection2 x KMBI 315 Connector rectangular/circular to install on the discharge of CMT1 x Speed Controller - REB32 x KMBI 250 Connector rectangular/circular to install on the discharge of CMT3 x TUNE-R-200-3-M1 - Control Damper2 x Helios PU10 Speed Potentiometer (Flush Mounted)3 x SG-200 Fan Guard for the HQW 2002 x DDMP 09-09 3F 2130W M6A4 DG01 x CMT-2 225/090 1.1KW - Single inlet centrifugal fan direct driven2 x DDMP 09/09 Mounting Flange2 x ENV 100 12v transformer SELV2 x KBA- Inlet Mounting 3552 x KKS 100 silencer-section - For use with the MUB 100 size Fans.2 x Elta Variable Speed Drive IP66 - 1.5KW2 x DDMP 10-08 3F 2210W M6A4 DG01 x Quietflow SQS100-1ECL - Centrifugal Box Fan2 x CMT/4-315/130-4KW - Single inlet centrifugal fan direct driven2 x KAD-355-F400 Rectangle Flexible Connector4 x Speed Controller - REB163 x TUNE-R-200-3-M2 - Control Damper4 x Helios ESA-1 Surface mounted Speed Control 1amp1 x CMT/4-250-100 1.1KW - Single inlet centrifugal fan direct driven ( LG-90)1 x Ancillary Pack for SB-Biflow 250 model2 x CBT-130N Centrifugal ATEX II 3D ExtD 125*C1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x Potentiometer EGH 01 - for DDMP Fans2 x RD35S-4DW.6W.3L - 122297 (Three Phase)2 x Flat Roof Terminal -OFT 5 - Asphalt1 x CBT-80N Centrifugal2 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x Two Speed Switch - REGUL-21 x Vent Axia SC5001 - Speed controller1 x Speed Controller - REB61 x Speed Controller - REB102 x FFR 355 Filter Cassette2 x Duct Termination with Mesh - 150mm2 x RSK355 - Back Draught Shutter1 x Skyflow SSR Horizontal Roof Cowl SSR80B1 x CBM Low Pressure Centrifugal Fan - CBM 9/9 4 Pole 550watt C VR4 x UB47- Universal Insulated Terminal2 x Elta - Room Sensor - Temp/Humid/C021 x Chaysol da 9-7 - 3 Speed1 x 220x90mm Insulated Rectangular Horizontal 45° Bend1 x 220x90mm Insulated Rectangular Vertical 45° Bend2 x LFBR 160 G4 - Helios Inline Filter Box - 160mm1 x TUNE-R-315-3-M4 - Control Damper2 x Duct Termination with Mesh - 355mm1 x CBP-18/18-RC Belt Driven Centrifugal Fans1 x KBA- Inlet Mounting 2801 x DA9/9-NT1 x 110 x 54mm Round to Rectangular Adaptor - Long1 x Ancillary Pack for SB-Biflow 315 model1 x Clearflow CF Roof Mounted Vertical Discharge Centrifugal Fan - CF450/4-1AC - Single Phase3 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR1 x VKS 355-500 Automatic shutter2 x 100mm Round Connector with Damper1 x TUNE-R-200-3-M0 - Control Damper (NO ACTUATOR)1 x REU 3amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x RDS 7 Helios Transformer Controller With Motor Protection1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x ELM 18 EX Flexible Cuff for ERM 181 x CBM 7/7 147w 4P RE-VR2 x Silent 300 CZ Design PLUS Extractor Fan2 x KBA- inlet mounting flange for CRMT 2251 x AXC TP - 100mm Plastic Centrifugal Inline Fan1 x Elta SCP400/4-1AC - IP551 x Chaysol da 9-7 - V7099331 x Quietflow Twin SQTDCV250-1ECL1 x Comefri - TLZ 450 R - High Performance Scroll Fan1 x Helios HQW-355/4 - IP552 x KBA- Inlet Mounting 2251 x ACO3TO-ADS-VFC-7.1A1 x MWS-75 Transformer controller with TK -7.5A1 x CBM Low Pressure Centrifugal Fan - CBM 9/9 4 Pole 550watt 3V (3-Speed)1 x CBM 9/7 4p 420W RE-VR1 x GXC6EC - High Performance Extract Fan2 x CMT/4-280-115 2.2KW - Single inlet centrifugal fan direct driven ( LG-90)1 x 204x60mm Insulated Rectangular Vertical 90° Bend1 x CK-60F Kit
Reviews
DAOSL Back Draft Damper
DAOSL Back Draft Damper
£ 11.49

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