Spiro-SAFE premium silencer diameter 400 mm - length 900 mm with core (100 mm insulation) without plug connections

Spiro-SAFE premium sound attenuator diameter 400 mm - length 900 mm with core (100 mm insulation)

The Spiro-SAFE premium sound attenuator diameter 400 mm - length 900 mm with core (100 mm insulation) is a round ventilation sound attenuator made of 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 connection of the sound attenuator features male connections (insertion ends) on both sides 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 attenuator. Depending on the model, the wool thickness is 50 mm or 100 mm for the PREMIUM-100. The mineral wool is flexible and cut from roll material, allowing it to conform well to the shape of the attenuator and ensuring uniform noise reduction along the entire length of the product. This guarantees consistent attenuation, even with variable airflows and smaller duct sizes.

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

The construction is sturdy and functional, with a rigid outer casing that withstands mechanical stress during installation and operation. The product code clearly provides 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, ranging from residential buildings to complex commercial installations.

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 sound attenuator uses 100mm thick mineral wool cut from rolls. This insulation better conforms to the internal shape of the attenuator, providing more uniform sound attenuation.
2. Central core: Starting from diameter 315, the premium attenuators are equipped with a core in the centre. The central core directs the airflow through a perforated inner tube, increasing the contact of sound waves with the absorbent layer. This particularly enhances attenuation of mid and high frequencies.
3. More uniform noise reduction: The combination of flexible insulation, secure fitting, and thoughtful design ensures the premium variant provides more consistent noise reduction across a wide frequency range. The standard variant may have slightly less uniform attenuation, especially at lower frequencies.