Solid Circular Silencer 600mm long - 100mm dia Product description USE For attenuation of noise produced by a ventilation system and spreaded along ventilation ductworks. Used jointly with sound-insulated fans in premises with high requirements to noise level produced by ventilation equipment. Compatible with Ø 100 mm up to 315 mm round air ducts. MOUNTING Fixing to round ducts with clamps. Any mounting position. For better sound absorption install the silencers in series. DESIGN Galvanized steel case is filled with non-flammable sound-absorbing material with protecting covering against fiber blowing. Airtight connection with air ducts due to connecting flanges with rubber seals. A great variety of standard ranges with several length options.