Spiro-SAFE premium silencer diameter 400 mm - length 600 mm with core (100 mm insulation) without plug connections

Spiro-SAFE premium sound attenuator diameter 400 mm - length 600 mm with core (100 mm insulation)

The Spiro-SAFE premium sound attenuator diameter 400 mm - length 600 mm with core (100 mm insulation) is a round 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 and technical spaces remain within acceptable limits.
The attenuator’s connection is equipped on both ends with a male spigot featuring an integrated double EPDM lip seal, creating an airtight and reliable connection to round ventilation ducts.

Practical information

Sound absorption is achieved using glass wool, situated 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 version. The mineral wool is flexible and cut from roll materials, allowing it to conform well to the shape of the attenuator and ensuring uniform sound attenuation along the entire length of the product. This provides consistent damping, even with variable airflow and smaller duct dimensions.

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

The construction is sturdy and functional, with a solid outer shell capable of withstanding mechanical stresses 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 correct attenuator for any ventilation project, from residential buildings to complex commercial installations.

Why is the premium version better than the standard version?

The premium sound attenuator offers several advantages over the standard model that make it better suited for certain applications:

1. Wool thickness: The premium sound attenuator uses 100 mm thick mineral wool cut from rolls, allowing the insulation to better conform to the inner shape of the attenuator, resulting in more uniform sound attenuation.
2. Central core: Starting from diameter 315, the premium attenuators feature a core in the centre. This central core ensures that air flows through a perforated inner tube, increasing the contact of sound waves with the absorption layer. This particularly enhances attenuation of mid and high frequencies.
3. More uniform sound reduction: The combination of flexible insulation, effective sealing, and thoughtful construction enables the premium variant to provide more consistent noise reduction across a broad frequency range. The standard variant’s sound attenuation can be slightly less uniform, especially at lower frequencies.