The BSIL attenuating bend has been designed for ventilation
systems where confined installation space or other
requirements prevent using straight (ducted) silencers, e.g. SIL.
The attenuating bend is made of two duct bends inside one
another. The inner bend is made of perforated steel sheet.
The clearance between the outer cladding and the inner
perforated cladding is filled with sound-insulating material.
To prevent its entrainment and loss due to the air flow, the
sound-insulating material is lined with a cloth.
The standard attenuating bends sized Ø315 mm are supplied
with the SPIRAL®system connectors. The attenuating bends
sized Ø355 mm and larger are supplied with the SPIRAL®system
NSL connectors.
