Spiro-SAFE premium silencer diameter 500 mm - length 900 mm with core (100 mm insulation)

Spiro-SAFE premium sound attenuator diameter 500 mm - length 900 mm with core (100 mm insulation)

The Spiro-SAFE premium sound attenuator diameter 500 mm - length 900 mm with core (100 mm insulation) is a circular ventilation sound attenuator made from galvanized steel, specifically designed for use in ventilation and air handling ducts. This attenuator 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 connections on both ends of the attenuator feature a male connection (insertion end) with an integrated double EPDM lip seal, providing an airtight and reliable connection to circular ventilation ducts.

Practical information

Sound absorption is achieved by means of glass wool positioned between the inner and outer shells of the attenuator. Depending on the model, the wool thickness is 50 mm for standard and 100 mm for PREMIUM-100. The mineral wool is flexible and cut from roll material, allowing it to conform well to the attenuator’s shape and ensuring uniform sound reduction along the entire length of the product. This results in consistent attenuation, even with variable airflow and smaller duct sizes.

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

The construction is solid and functional, with a sturdy outer shell resistant to mechanical stress during installation and use. The product code clearly indicates information about the attenuator type, insulation thickness, duct diameter (Ød1), and attenuator length. This makes it easy to select the right attenuator for any ventilation project, from residential buildings to complex commercial applications.

Why is the premium variant better than the standard variant?

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

1. Wool thickness: The premium attenuator uses 100 mm thick mineral wool cut from roll material, which adapts better to the inner shape of the attenuator and provides more uniform sound attenuation.
2. Central core: Starting from diameter 315, the premium attenuators feature a central core. This core directs the airflow through a perforated inner tube, increasing the contact of sound waves with the absorption layer. As a result, especially mid and high frequencies are attenuated more effectively.
3. More uniform sound reduction: The combination of flexible insulation, tight joints, and thoughtful construction ensures that the premium variant delivers more consistent sound attenuation across a wide frequency range. The standard variant may provide less uniform attenuation, particularly at lower frequencies.