Spiro-SAFE silencer diameter 400 mm - length 900 mm (100 mm insulation)

Spiro-SAFE Silencer Diameter 400 mm - Length 900 mm (100 mm Insulation)

The Spiro-SAFE silencer with a diameter of 400 mm and length of 900 mm (100 mm insulation) is a round ventilation silencer made of galvanized steel, specially designed for use in ventilation and air handling ducts. This silencer is engineered to effectively reduce noise generated by airflow and mechanical fans, ensuring that sound levels in occupied spaces and technical rooms remain within acceptable limits.
The silencer connection on both ends features a male connection (insertion end) with an integrated double EPDM lip seal, providing an airtight and reliable connection to round ventilation ducts.

Practical Information

Sound absorption is achieved through glass wool located between the inner and outer casing of the silencer. Depending on the model, the wool thickness is 50 mm or 100 mm for the PREMIUM-100 version. The mineral wool is flexible and cut from roll material, allowing it to fit well to the shape of the silencer and ensuring uniform sound reduction over the entire length of the product. This guarantees consistent attenuation even with variable airflow rates and smaller duct sizes.

The outer casing is made from high-quality galvanized steel to ensure durability and reliability, providing a robust and corrosion-resistant finish.

The construction is sturdy and functional, with a solid outer shell that withstands mechanical stresses during installation and operation. The product code clearly indicates the silencer type, insulation thickness, duct diameter (Ød1), and silencer length, making it easy to select the right silencer for any ventilation project, from residential buildings to complex commercial installations.

Why is the Premium Version Better Than the Standard Version?

The premium silencer offers several advantages over the standard silencer, making it better suited for certain applications:

1. Wool Thickness: The premium silencer uses 100 mm thick mineral wool cut from rolls, allowing the insulation to better conform to the internal shape of the silencer for more uniform sound attenuation.
2. Central Core: From diameter 315 and above, premium silencers feature a central core. This core directs airflow through a perforated inner tube, increasing contact between sound waves and the absorption layer. This significantly improves attenuation of mid and high frequencies.
3. More Uniform Sound Reduction: The combination of flexible insulation, good sealing, and thoughtful construction ensures that the premium version provides a more consistent sound attenuation across a wide frequency range. In contrast, the standard version’s attenuation may be somewhat less uniform, especially at lower frequencies.