S Series (Spigot Connection) Attenuator

A comprehensive range of attenuators with male spigot connections to suit metric spiral ductwork systems.

Available in up to four standard lengths from stock they have excellent attenuation properties.  Achieved with sound absorbing acoustic infill which is glass tissue faced as standard to minimise fibre migration retained in the casing with a perforated steel liner.


Melinex lining (no additional cost)

Where moist or greasy ambient conditions exist (kitchen hood or wash extract) or for clean air applications (hospital or test lab).  The glass tissue facing should be replaced with a melinex lining barrier.  To prevent any particle migration through the inner liner and to protect the acoustic infill from soakage.  This will however result in a slight loss of attenuator performance.  Please contact our sales office for further information.

  • Standard sizes from 100 to 500mm internal diameter
  • Four standard lengths 300mm, 600mm, 900mm and 1200mm
  • Special diameters and lengths on request up to 1500mm long
  • Maximum continuous temperature 100 degrees C
  • Maximum pressure 1500 pa + / 750 pa-
  • Deep stock holding of popular size combinations

Material Specification

Casing: pre galvanised mild steel, with single piece spun formed end caps

Inner liner: perforated galvanised mild steel

Acoustic infill: inert resin bonded mineral wool slabs

Manufactured to HVCA ductwork specification DW144, class ‘b’

Alternative product/material/finish

Although we only stock products manufactured to our standard specification, we are able to supply custom made products with alternative dimensions, temperature ratings, material type (stainless steel and aluminium) and finishes (powder coated)

Got a Question, or Looking for a Quotation?

Looking for a quotation for any of our stock products or bespoke manufactured items. Contact us on +44 (0)2393 200 170 or email us at sales@airmovementsupplies.co.uk, a member of our team will be happy to assist you.