Beirens SAS products

Our single and twin wall modular flue and chimney systems are suitable for evacuating gases from boilers running on gas, fuel oil, wood and coal. They can be used in many types of applications: ideally suited for domestic, commercial and industrial schemes, the flues can be located internally or externally, and for both new build and renovation projects.

Double-chamber resonator: This silencer is formed by assembling two volumes inside a section of the smoke flue (exhaust or chimney) through which all smoke flows. The transversal section of these chambers is greater than the size of the flue, hence the name «expansion chamber». Gas inlets and outlets of these silencers can be axial or radial.

This type of silencer consists of a series of parallel baffles placed inside the smoke flue (exhaust or chimney) creating large contact areas that efficiently absorb low, medium and high frequency noises. The noise generated by turbine exhausts is significant (>130 dB) and therefore requires high-performance acoustic treatment. Each baffle is optimised to achieve the highest level of performance, while reducing pressure losses as much as possible. BEIRENS has developed a specific baffle design for this application, made up of independent absorbent boxes mounted on slides that are free to move and expand in relation to each other. Thus, each one is subject to lower mechanical stress, which contributes to avoid cracking, increasing both acoustic and structural performance.