The SLC and SRC rectangular acoustic duct silencers are intended for sound attenuation in ventilation and air conditioning systems. More often than not they are mounted between the fan and the air supply duct or air exhaust duct and before the air diffusers
The acoustic silencer consists of the housing and internal baffles. The housing is made of galvanised steel sheet and has frames at the ends made of sheet metal profiles. The baffle is rounded on one side and consists of the frame made of galvanised steel sheet and sound-absorbing insert that absorbs the acoustic energy.
The sound-absorbing insert constitutes a combination of non-flammable mineral wool boards. Its external surface is covered with a special abrasion-resistant fabric that protects the mineral wool. The mineral wool boards are covered with black glass fibre veil, the surface of which is adapted to the air flow with the speed of 20 m/s.
The maximum temperature of the thermal energy carrier is 250°C. The product is non-flammable.
With bigger sizes - a or b - the baffles are carried out as combined.
In terms of the design, we distinguish three types of baffles:
L - absorption baffles,
R – absorption-resonator baffles
P – absorption-resonator baffles, perforated
Distance s between the baffles is 40 - 100 mm.
SLC, SRC and SPC rectangular silencers are mounted in ventilation runs with the vertically positioned baffles.
