Multiflow Attenuators - MFB / SIL Series

  Features

  • Silencer overall length includes a 300mm long plenum section which should be fitted to the fan flange when silencers/fans are coupled.
  • This aids the airflow entering/exiting the fan unit and minimises flow disturbance and losses.
  • Alternative silencer lengths are available to special order, together with Melinex lining to baffles.
  • The illustrated insertion losses will vary under such cases - please consult Elta Fans.

  Construction

  • The units are rigidly constructed and consist of a galvanised sheet metal casing containing a series of centre and side splitters.
  • End flanges are of the Ductmate type to allow easy fixing to the Multiflow Series, of fans and ductwork.

  Dimensions

 
Model
MFB ..SIL
A B C E Ductmate
Flange size  
Kg
350 350 400 1200 9 375 25 24
400 400 450 1200 9 425 25 31
450 450 500 1200 9 475 25 38
500 500 550 1200 9 525 25 42
550 550 620 1200 11 585 35 49
650 650 720 1500 11 685 35 74
700 700 770 1500 11 735

35

81

  Performance

  • Performance data is based on an adaptation of the standard Q-Tech Rectangular attenuator range.
  • Refer to pages G-6/10 for further information.

  Sound Data

  Static Insertion Loss, dB
Model Octave Band Centre Frequency (Hz)
MFB..SIL 63 125 250 500 1k 2k 4k 8k
350 4 6 14 23 30 29 20 14
400 4 6 14 23 30 29 20 14
450 4 9 13 25 31 30 22 15
500 4 9 14 24 30 30 23 16
550 4 6 11 22 28 27 18 14
650 4 7 13 24 26 25 17 12
700 4 7 13 24 26 25 17 12

  PDF

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TDE

The Multiflow TDE 500 to 710 range consist of fully cased, cylindrical models with circular mounting flanges at both ends and a wired terminal box.

RVF

The Mini Centrifugal Roof Fan series are the new type roof extract units available in 2 sizes and suitable for vertical and horizontal installation. The low noise external motor and high efficient backward bladed impeller meets the requirement of efficient ventilation in residential, commercial and light industrial applications.

Future 150

The Decor Series can be wall or ceiling mounted and is designed to exhaust stale and moist air from bathrooms, toilets, laundries etc. They are also suitable for ventilating all types of small or closed areas.

TD Silent

The Silent Series is a low profile mixed-flow in-line fan that produces low noise when in operation. It does this through a specifically designed perforated internal skin that directs sound waves produced inside the fan to a layer of sound absorbent material.

NEW!! TD-EVO

The low-profile TD-EVO 250 and 315 in-line mixed-flow fans for circular ducts have a unique design where the support bracket allows the motor and impeller assembly to be fitted or removed without dismantling the adjacent ducting.

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